Fluid coils

Anti-corrosion treatment for microchannel dry coils


Kaltra advances in creating protective treatments for microchannel heat exchangers and introduces new anti-corrosion coating for dry (fluid) coils to apply to inner surfaces. The new coating enables for an expanded range of process water pH value, a measure of how acidic/basic water is.

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Cooling plant

Essential chiller maintenance checklist


Every chiller or chiller plant should be, for the most part, relatively self-reliant. Yet like all heavy machinery, regular preventive maintenance can improve performance, prevent breakdowns, and extend the service life of the equipment. Chillers should be inspected leastwise two times a year if they are only used during the cooling seasons and four times a year in case of continuous operation.

We recommend the following procedures to keep your chiller system at peak performance and avoid unexpected shutdowns and costly downtimes. The below checklist has been compiled to help chiller plant operators conduct detailed and reliable maintenance on air-cooled and water-cooled chillers.

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Modular precision air conditioner

Kaltra introduces modular precision air conditioners


Lambda CW II is the result of an extensive R&D process, with Kaltra utilizing microchannel coil technology to give new ranges their own unique properties for precision cooling.

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CAB furnace

Microchannel heat exchangers: fabrication process


Air-conditioning and refrigeration industries have been evolving rapidly over the past decades. The latest energy efficiency regulations and phase-out of ozone-depleting refrigerants spur further development of air-to-refrigerant heat exchangers, making microchannel heat exchangers the better alternative to conventional heat exchangers for the majority of HVAC manufacturers. Heat transfer technology based on microchannel coils offers the largest potential for improving energy efficiency, reducing refrigerant volumes required,  while also providing a number of other benefits.

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Refrigerant distributor

Optimization of refrigerant distribution for microchannel evaporators


Microchannel heat exchangers have been broadly used in automotive applications due to their advantages of compactness, low weight, and high efficiency. There are numerous heat exchangers designs based on microchannel technology with folded fins and flat tubes which are connected to manifolds. These designs are predominantly used for automotive radiators, condensers, and, more recently, automotive air conditioning evaporators.

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Microchannel condenser bank

Air-cooled condenser assemblies for end-customers and OEMs


Based on recently introduced low-charge microchannel condensers, Kaltra offers high-performance V-shaped condensing coil assemblies intended for use in air-cooled chillers and stand-alone condensers.

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E-coated microchannel coil

High-grade corrosion protection for heat exchangers


Although modern microchannel heat exchangers made from highly corrosion-resistant alloys and able to withstand any type of corrosion, be it galvanic, formicary, or other types, even without any protective coating, there are some harsh conditions under which additional treatment may extend their service life and guarantee trouble-free HVAC equipment operation.

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Altmunster office

Kaltra is relocating its activities in Austria to Altmunster


As of January 31st, the main office of Kaltra in Austria will move to a new location in the city of Altmünster, which offers a better infrastructure to assist local customers. Kaltra has been highly active in Austria and surrounding regions since 2017 and expects significant business growth in the next couple of years.

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Microchannel heat exchanger

Kaltra offers coil replacements for condensers and water applications


When you need OEM replacement coils for your refrigeration or cooling system, Kaltra gets you covered with microchannel heat exchangers, matching or exceeding the performance of original coils.

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R32 scroll chiller

Kaltra launches a range of scroll chillers optimized for lower GWP refrigerant R32


Kaltra extends the portfolio of low-GWP chillers with the launch of Lightstream Scroll range based on its Versa platform and operating on refrigerant R32. Lineup’s capacity ranges from 300 to 1100kW at nominal conditions and demonstrates the same high level of efficiency as previously introduced R452b-based models.

Lightstream Scroll R32 available with the same extensive set of hydronic options, free cooling circuit, safety options, low-noise models, and control software functionality as found in existing Lightstream Scroll chillers running on refrigerants R410a and R452b.

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Precision air conditioner

Kaltra updates its range of Delta DX precision air conditioning units


This week Kaltra announced the updated range of its mainstream Delta DX precision air conditioners.

New models received the scroll compressors with latest control electronics and recent-generation radial EC fans with Modbus control.

The capacity range has been extended with unit models in the 5-15kW range (equipped with rotary compressors), as well as with top models delivering 125-150kW of cooling.

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HVAC system

Kaltra offers cooling solutions for HafenCity development project


Urban redevelopment plays a major role in the growth strategy of today’s cities. The advantages of urban renewal are obvious: substantial savings can be achieved by using modernized, energy-efficient infrastructure, including air conditioning and cooling facilities – which draw a significant fraction of energy in modern urban areas. Read more

Free cooling chiller

Kaltra extends the capacity of its flagship free cooling chiller range


Kaltra has extended the capacity range of its Lightstream Freecool inverter chiller to 1800kW of refrigeration. Lightstream Freecool chiller lineup was introduced in 2017, initially with a capacity range of 450 to 1200kW.

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Dry cooler

Dry coolers vs. wet cooling towers

Working Principle

Cooling towers are heat-transfer devices that are used to reject heat loads to the atmosphere. Cooling towers are used to cool circulating water in a wide variety of applications such as process cooling and HVAC systems.

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Water-cooled chiller

Air-cooled vs. water-cooled chillers

Working Principle and Differences

A chiller is a heat transferring device that uses mechanical refrigeration to remove heat from a continuous flow of process liquid and transfers it to the environment, thus lowering the temperature of the process liquid. Read more

Vienna office

Kaltra establishing its presence in Austria


We are delighted to announce the expansion of our business with the launch of our Austrian office, located in Vienna. In line with Kaltra’s growth in the Austrian market, the Vienna office strengthens our positions with a focus on expanding regional presence.

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Bora XL dry cooler

Kaltra expands its dry cooler portfolio with Bora XL range


This week, Kaltra announced its next range of dry coolers based on recently engineered Versa platform. Versa is a shared set of innovative engineering, major components, and production efforts over a number of the distinct, full-size chillercondenser, and dry cooler ranges. Kaltra’s equipment based on Versa platform characterized by high flexibility, significantly lower manufacturing costs, and enables easy customization and adaptation to the customer-specific application and requirements.

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Bora XL condenser

Kaltra offers high-performance condensers of Bora XL range


The XL range is a further development of Bora series air-cooled condensers which offer to the customers consistently high performance combined with reduced footprint and low refrigerant charge. Bora XL condensers have been designed to use with both traditional and low-GWP refrigerants, including R134a, R410a, R452b, R513a, R449a and more. The range includes models in the nominal capacity range from 150 to 1850 kW with two available sound level versions: standard low noise and extra low noise.

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Water-cooled Turbocor chiller

R1234ze chillers bring efficiency to rolling mill facility


As global warming potential becomes more of an issue, a growing number of industries and businesses moving toward new refrigerants. One of the best examples is the recent upgrade completed by Kaltra for ArcelorMittal’s hot strip rolling mill cooling in Belgium. Recently, the cooling system was driven by water-cooled chillers charged with large amounts of refrigerant R134a, which is characterized by high GWP value of 1430.

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E-coated microchannel coil

Heat exchanger protection with electrocoating



Corrosion, the deterioration of metals and alloys through a physical and/or chemical reaction with the environment, is expensive. Heat exchangers used in HVAC equipment, specifically condenser and cooling/heating coils are exposed in the environment, and this can lead to corrosion, failures, and performance degradation of the equipment in the cases of improper heat exchanger protection in corrosive locations.

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R452b scroll chiller

Air-cooled chillers with R452b now available


Following the debut of its water-cooled chillers running on refrigerant R452b this March, Kaltra announces an air-cooled range of chillers with scroll compressors using this low-GWP refrigerant.

Lightstream Scroll R452b chillers will be available in the capacity range from 260 to 1000kW and may be fitted with the highly efficient free cooling system. Other options include partial heat recovery with a desuperheater or full heat recovery, making these chillers a multi-purpose solution for simultaneous, year-round production of chilled and hot water.

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Serpentine coil

Serpentine coils for compact cooling systems



Compact heat exchangers, especially those of serpentine design, are widely used for cooling in many industries, products and systems, from consumer products to IT cooling to military applications. In recent times, with the advances in microfluidics and progress in manufacturing, compact microchannel heat exchangers are becoming widespread. The principal idea behind using microchannel heat exchangers is their potential for enhanced heat transfer capabilities. The use of such heat exchangers enables the transfer of large amounts of heat while benefiting from high heat transfer coefficients.

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Water-cooled chiller

R452b chillers added to Kaltra portfolio


Kaltra is now offering low-GWP refrigerant R452b across its Easystream-M range of modular water-cooled chillers with scroll compressors – an environment-friendly alternative to R410a gas with a GWP value as low as 675. R452b is a zeotropic HFO/HFC blend classified as a mildly flammable refrigerant (A2L ASHRAE safety class) which delivers an optimal balance of performance, safety, and compatibility to replace R410a and outperforms other R410a alternatives.

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Microchannel heat exchanger manufacturing plant

Microchannel coils in single-phase heat transfer applications


Single-phase heat exchangers are widely used today for a variety of cooling and heating applications and in different types of equipment. These include free cooling systems, dry coolers, air conditioners, and more, where the most common media is water or glycol mixtures. Microchannel coils in practice became the norm in condenser applications, and, more recently, microchannel heat exchangers became an alternative to finned tube coils that used traditionally for water applications.

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Scroll chiller

Kaltra adds air-cooled version to its Easystream chiller range


Kaltra, a leading manufacturer of air conditioning and refrigeration equipment, has announced the commercial launch of scroll chillers that expands an existing lineup of condenserless and water-cooled models with air-cooled version.

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Canary Wharf chilled water plant

Kaltra completes the chilled water production project in Canary Wharf


It is well-known that the cooling equipment dominates in energy consumption in commercial buildings. Alongside, electricity prices are increasing around the world, increasing pressure on facility managers to reduce the operating costs incurred by operating chillers. The facility managers at a newly constructed commercial building in Canary Wharf, London, were tasked to build and deploy a central air conditioning system with improved energy efficiency and lifecycle value, and Kaltra was invited to contribute to this task.

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Kaltra office UK/Ireland

Kaltra opens branch to serve its customers in the UK and Ireland


In response to growing customer interest and following its plan to step up the regional expansion, Kaltra, a world-known developer and supplier of air conditioning, cooling and refrigeration products and systems, is proud to announce the opening of independent, strategically vital entity to serve its customers in the United Kingdom and Ireland.

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Air-cooled condenser

Low-charge air-cooled condensers for use with low-GWP refrigerants


Kaltra is now taking one step further by introducing the new flatbed, low-charge air-cooled condensers for use with low-GWP refrigerants, including R449a, R454a, and R454c.

To meet market requirements to reduce global warming potential and increase the energy efficiency of cooling equipment, Kaltra has engineered a new line of air-cooled condensers with market-leading features at reasonable initial and running costs.

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Variable-speed water-cooled chiller

Kaltra extends the range of water-cooled chillers with inverter models and adds R513a


Kaltra is delighted to make an exciting new addition to their chiller portfolio – Powerstream Screw Inverter family of water-cooled chillers.

The chillers feature fixed-speed screw compressor combined with an inverter-driven one.  The unit starts with the inverter compressor; when the cooling demand exceeds its capacity, the second compressor starts up at full speed to ensure the best possible efficiency. Capacity regulation is carried out by the inverter-driven compressor.

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Free cooling chiller

Air conditioning chiller replacement for a movie theater in Eindhoven


The air conditioning chiller supporting the movie theatre building in Eindhoven, The Netherlands, was the original equipment that has reached the end of its service life. To address the recurring maintenance issues associated with air conditioning system, the building owner has decided to replace existing equipment, including the original chillers installed at the roof gantry, with a modern energy-efficient system.

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Cooling plant

Kaltra expands chilled water plant at multi-tenant commercial centre


With the expansion of its premises, a large commercial centre located in Marseille needed to increase the capacity of its chilled water plant to meet the growing demand for chilled water production. Opened in 2014, Les Terrasses du Port occupies the area of more than 60,000 square meters and is a home to around 200 stores, restaurants, and food courts.

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Free cooling chiller

Kaltra modernizes Ultracompact II chiller to add a new free cooling system


Following the market success of Ultracompact II, Kaltra modernized its free cooling version. The revised free cooling system now includes double-regulating valves and a 3-way mixing valve for precise water temperature control in free cooling operation.

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Free cooling chiller

Retrofitting air conditioning system with a free cooling chiller


Several concerns including inefficient energy use and growing maintenance costs initiated the need for a chiller replacement at Business Park Vienna, Austria. Having been installed for a long period, and being one of the largest energy consumers in a multi-story building, the existing air-cooled chiller did not operate efficiently under part load conditions such as non-business hours air-conditioning.

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LPG recovery plant cooling

Kaltra rolls out the second stage of chilled water plant at Sonatrach LPG recovery


Following the initial installation of process cooling system at the GP2Z industrial area in 2016, Kaltra continues to extend the facility and adds new equipment to increase its overall capacity to 5MW cooling.

Initially equipped with air-cooled Lightstream series chillers, GP2Z chilled water production plant will be supplemented with high-reliable units based on screw compressors. Kaltra will integrate new equipment with existing automation system implemented during the first stage of the project.

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Free cooling chiller

Kaltra R513a chillers now available


Following the recent announcement of its first R513a-compatible chiller range, Kaltra has revealed the availability of its Lightstream Freecool inverter-driven chillers with refrigerant R513a in addition to regular R134a and low-GWP R1234ze.

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Turbocor centrifugal chiller

Kaltra extends its Powerstream Turbo range with high-capacity models


In response to the rising demand for high-end, energy-efficient cooling solutions, Kaltra has expanded its flagship lineup of Turbocor-based chillers. So far, the customers have been able to pick from the models with the capacity range of up to 1800kW. For increased requirements, Kaltra has added 5- and 6-compressor models to Powerstream Turbo chiller family making it suitable for large commercial and industrial cooling applications with up to 4600kW cooling power per chiller unit. With an ESEER value as high as 10.50 and new control software which optimizes the performance of multi-compressor units, Powerstream Turbo chillers meet the highest demands for energy efficiency at any operating condition.

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Inverter chiller

Kaltra announces a new, broad screw chiller range


This week Kaltra announced its new chiller family designed with screw compressors, a successor of well-known Lightstream Screw range.

With different screw compressors, inverter-driven and fixed-speed, Kaltra launched its widest chiller lineup which includes R134a and R1234ze models, 160 in total. Units with R513a refrigerant are available by request. New Lightstream Screw V chillers cover all applications in the capacity range from 200 to 3600kW. In addition to process cooling and air conditioning tasks, the new screw chillers are addressed for mission-critical applications where the reliability and precise temperature control are the crucial factors.

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Precision air conditioner

Precision air conditioning system installed for Amtech, Inc.


Significant attention is currently being paid to improving building energy efficiency and reducing of environmental impact, as required by the recent European directives. In commercial and industrial buildings, a significant part of the energy demand is related to air conditioning systems.

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Dry cooler

Kaltra supplied high-performance dry coolers to FME hospital in Mulhouse


The infrastructure of the newly inaugurated hospital in Mulhouse includes central air conditioning system which provides the cooling and heating to the building, as required. The heat rejection of the system is performed by high-efficient dry coolers with a total capacity of 2000kW, installed outside. Given the limited installation space and tight noise rejection requirements, Kaltra offered a compact solution based on Mistral dry coolers with the bottom to top airflow. Year-round operation of the air conditioning system is supported by a glycol-based coolant.

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Evaporatively-cooled chiller

Enhancing air-cooled chiller performance with evaporative cooling


Amount of electrical power consumed by cooling systems in energy-intensive industries like data centers and manufacturing plants is huge, especially in hot climate locations, and this fuels the development of new, energy-efficient cooling solutions and equipment for mission-critical applications. One of the more promising solutions is evaporative cooling combined with the conventional compressor-based system.

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Free cooling chiller

Free cooling chillers improve data center energy efficiency


Over time, increasing power density and growing number of installed servers had increased the heat load on Telecity data center cooling system which operates on a 24/7 basis 365 days on the year. Existing fixed-speed chillers installed during the building’s construction could not meet the cooling demand and provide the necessary redundancy Telecity required. As a result, the cooling system needed to be upgraded to keep pace with the data center’s growth.

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Turbocor centrifugal chiller

Highly efficient Turbocor-based chillers


From an energy usage point of view, chillers are the most energy-intensive equipment to run and the key components within a chiller that impact performance and energy consumption are compressors. Turbocor compressors with built-in variable speed control can offer substantial energy savings of 50-60% compared to chillers equipped with fixed-speed compressors. In addition to the stepless capacity control, the Turbocor compressors employ built-in inlet guide vanes to trim the compressor capacity at low loads.

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Evaporative dry coolers

Hybrid dry coolers: a water-saving cooling solution


Closed-loop process cooling systems are gaining attention among a growing number of industries with the introduction of more stringent regulations on water use and increasing costs for water purchase and discharge. A hybrid cooling system where the dry cooling and evaporative cooling technologies are taken together is an attractive alternative to open-loop cooling towers in terms of both water saving and efficiency.

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Microchannel heat exchanger

Microchannel heat exchangers as an advanced alternative to traditional HVAC coils

Introduction

For over three decades now, air-to-refrigerant microchannel heat exchangers have been successfully used in a number of industries, including automotive and chemical processing. More than a decade ago, microchannel heat exchangers were introduced in the HVAC industry; but it must be noted that requirements concerning heat exchangers and their operating conditions in refrigeration and air conditioning systems are different from those applicable in the automotive and other industries. Because of this, the first adaptations of microchannel heat exchangers to HVAC applications, principally as condensers, were not entirely successful.

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Evaporative condenser

Green refrigeration saves energy for retail business in Spain


Supermarkets are one of the most energy-intensive types of commercial buildings. Supermarket refrigeration systems consume the significant amount of energy to maintain freezing temperatures for a variety of items intended for human consumption on a 24 hours a day, seven days a week basis, which implies that the refrigeration equipment is never shut off. In a typical supermarket, sales area of 1000m² consumes around 300.000kWh annually for refrigeration, including the power consumed by compressors, condensers, coolers, and evaporator defrosting.

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Air-cooled screw chiller

New chillers for Arla dairy processing plant


Processing of milk products requires the correctly designed process in order to attain end products of the highest quality. Processing of milk involves pasteurization, a technique that destroys pathogens in milk and makes it safe to drink. Pasteurization necessitates the use of chilled water to cool down the milk after the heating-up process to prevent the deterioration. During the cooling process, the pasteurized milk has to be cooled to 0°C. Thus, the production of chilled water for dairy processing operations is a vital part of producing safe and high-quality consumer products. Tight thermal control is also a crucial requirement for dairy processing facilities.

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Water-cooled Turbocor chiller

HVAC system modernization on The Parade, Swindon


The main drivers which fuelled the modernization of a cooling plant at 4.000 sq. meter outlet were rising energy bills and a sharp increase in maintenance costs. The original chiller plant which included units contained ozone-depleting refrigerant was in need of replacing with more efficient and quiet equipment. Based on the survey and energy analysis performed by Kaltra engineers, the new equipment necessary to replace the existing equipment for an energy saving modernization was specified, including two 300kW variable speed drive chillers, together with quieter dry coolers.

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Variable-speed chiller

Kaltra’s advanced cooling solutions help realize massive power savings


At the Sanofi/France production site, the original chilled water plant functioned as initially intended, but a steady decline in energy performance and sharp increases in maintenance costs of the plant equipment were experienced by the customer. Prior to starting the upgrade project of the plant, the owners made the decision to invest by using technology giving the highest return over the lifecycle of the equipment.

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Air-cooled chiller

Kaltra screw chillers serve four-star hotel in Malaga, Spain


In the last week of 2017, Kaltra Innovativtechnik completed installation and commissioning work on the chiller replacements for a four-star luxury hotel located in Malaga, Spain.

The customer experienced inadequate comfort air conditioning from the existing air-cooled chillers and escalating operating costs. The hotel operator called on Kaltra for a replacement to reduce energy consumption, improve the reliable, smooth and quiet operation of the system.

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Unit cooler

Kaltra starts the production of Tramontana unit coolers


Kaltra Innovativtechnik starts production of its Tramontana unit coolers with a capacity range of up to 60kW. Tramontana units stand out based on consistent performance, wide selection of optional components to tailor the solution to the customers’ requirements, and low installation and maintenance cost.

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Precision air conditioner

Technology rally: microchannel vs. finned tube evaporator



In recent times, microchannel heat exchangers (MCHE) have started to attract attention from the HVAC industry as an alternative to fin/tube evaporators. The enhancement of heat transfer and compactness are major advantages of microchannel heat exchangers, as well as reduced refrigerant charge, lower airside pressure drop, and a reduction in materials used for manufacturing. Under current tight regulations of energy efficiency, microchannel heat exchangers are appreciated by many leading manufacturers.

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Manufacturing plant

Kaltra accelerates growth with the opening of a new manufacturing facility in Slovenia


Kaltra is proud to announce the opening of a brand-new manufacturing plant in Slovenia. The facility consists of 4000 square meters of manufacturing space, a test lab, and offices. Approximately 30 employees will work in the new location initially and it is expected to grow to around 80 within the next two years.

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Cooling plant

Efficiency optimization for cooling plants


In most developed countries, a large amount of energy use of about 6% of the total is for air conditioning and refrigeration. The same is true for many hot countries where air conditioning systems use up to 40% of energy in the cities, and this could be a major problem as developing economies continue to grow.

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In-row cooling

Aisle containment as an approach to data center cooling


For decades, data centers have used raised floor systems to deliver cooled air to the server racks. Cooled air discharged by a computer room air conditioner (CRAC – a split air conditioning system or system with fluid coolers) or air handler (CRAH – a chilled water cooling system connected to air-cooled or water-cooled chillers) creates high pressure in the underfloor space. Read more

Evapco-Alcoil

EVAPCO acquires Alcoil to create EVAPCO Alcoil, Inc.


EVAPCO Inc., an industry leading manufacturing company with global resources and solutions for worldwide heat transfer applications, announced today that it has acquired Alcoil USA LLC , a York, Pennsylvania-based company that designs and manufactures micro-channel heat exchangers.

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Evaporative dry coolers

Kaltra extends its portfolio with evaporative condensers and dry coolers


With the development of evaporative air-cooled condensers and dry coolers, Kaltra sets new standards in the field of efficient and environmentally safe cooling.

The power saving potential of the new units is based on the evaporative cooling principle, in which the air temperature drops when the air takes up water by transforming it from liquid to vapor.

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Microchannel coil

Corrosion protection for microchannel heat exchangers


Corrosion is the deterioration of metals arising from the chemical reactions between a metal and the surrounding environment. In HVAC equipment, such as air-cooled chillerscondensers, and dry coolers, corrosion of the heat exchangers may lead to performance and efficiency losses, as well as to equipment failures.

In order to avoid unwanted corrosion, microchannel heat exchangers and chilled water system, in general, must be properly protected based on environmental conditions.

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Air-cooled chiller

Kaltra reveals the new Ultracompact II product line


As a part of its long-term product development roadmap, Kaltra Innovativtechnik introduces the next generation of its Ultracompact product line. This series covers the cooling duty range between 50 and 300kW with capacity increases of 25kW and provides total or partial heat recovery in compact machine design and suitable for air-cooled applications across many industries.

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Evaporatively-cooled condenser

Evaporative cooling helps to boost cooling equipment efficiency


Adiabatic cooling was first used in the Roman Empire. For 2000 years, people have been using water evaporation to cool down the surrounding air in all types of climate systems, including modern, highly advanced cooling systems, where engineers combine this ancient principle with modern technologies.

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Chiller sequencer

Sequence management for chiller plants


When it comes to chilled water plant optimization, the control strategy based on management of individual water chillers is not an optimum approach to achieve the best results in terms of energy efficiency.

Individual control of the water chillers with common pipework will cause unnecessary cycling of compressors and associated excessive power consumption as a response to changes in cooling demand; consequently, compressor cycling will lead to unstable return water temperature and increased wear of compressors.

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In-row cooling unit

Kaltra announces the second generation of in-row cooling units with a 50% capacity increase


Among other innovations, Kaltra launches the second generation of its high-capacity in-row cooling solution designed for high power density data centers. With the cooling capacity of 141kW, Lambda In-Row is able to replace up to 4 typical in-row cooling units, saving expensive data center space for server racks.

Lambda In-Row has a new microchannel evaporator combined in V-form with a 41m² total heat transfer surface. With these evaporators, the cooling capacity of the new units increases from 90 kW to 141kW (for water temperatures of 15/21°C and inlet air temperature of 40°C).  A special type of manifolds for microchannel heat exchangers provide a uniform water distribution, and at the same time keeps low waterside pressure drop.

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Microchannel evaporator

Alcoil receives U.S. and international patents for microchannel evaporator design


Alcoil announces the issuance of US Patent No. 9,459,057 and European Patent EP 2 948 725, which relates to an improved and advanced refrigerant evaporator design. The patented technology is used as an air-to-refrigerant microchannel heat exchanger to cool air or reject heat in residential, commercial or industrial evaporators and heat pump systems.

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Turbocor chiller

Lightstream Turbo chiller range extended with highly efficient models


Trending Turbocor-based chiller family by Kaltra has been extended with highly efficient models with extra condenser banks, which enable lower condensing temperatures and 15% higher energy efficiency rates (EER) compared to standard Lightstream Turbo models, as well as reduced noise emission level.

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Free cooling chiller

Kaltra announces the new Lightstream Freecool chiller family


Kaltra Innovativtechnik, a German-based provider of innovative thermal management technologies and advanced cooling equipment, is excited to announce the launch of the new lineup of freecooling chillers based on frequency-controlled compact screw compressors and microchannel technology adopted for both condensing and freecooling coils.

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Logistics hub cooling

New logistics hub near Erlangen served by Kaltra chillers


The new logistics hub located near Erlangen, Germany, serves more than 40 international customers and guarantees just-in-time delivery for the clients across Europe. The new center with approx. 35,000m² is dedicated to storing bulky materials under controlled environmental conditions provided by Kaltra Lightstream Screw free cooling chillers.

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Serpentine coil

Serpentine heat exchangers for small cooling applications


Kaltra offers the latest heat transfer technology for electronics cooling, cooling of laser devices, medical appliances, and other small cooling applications with serpentine heat exchangers based on microchannel technology.

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Plant room chiller

Kaltra unveils its new family of packaged chillers


German chiller manufacturer, Kaltra Innovativtechnik, is set to showcase its new Easystream family of air- and water-cooled chillers with scroll compressors in March 2017.

New chillers are intended for either indoor or outdoor installation. The series covers the capacity range starting from 40kW and up to 480kW with cooling densities of up to 220kW/m². When used with Mistral condensers/dry coolers, Easystream allows for installation in populated urban areas and anywhere where low noise pollution is a crucial factor.

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Variable-speed chiller

Kaltra to announce the updated Lightstream Screw air-cooled chiller family


Kaltra is excited to announce the launch of the updated lineup of Lighstream Screw chillers based on fixed-speed or inverter-driven compact screw compressors, which have been improved to perform efficiently and optimally under every climatic condition.

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Compact scroll chillers

Kaltra debut a range of updated compact scroll chillers


Kaltra Innovativtechnik begins marketing and selling updated Ultracompact air-cooled chillers. Each chiller model in the Ultracompact range features an aluminium frame and paneling with a 10-year corrosion resistance warranty.

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Air-cooled condenser

Air-cooled condensers and dry coolers for refrigeration and industrial process


Mistral is the next generation of table-type air-cooled condensers and dry coolers that cover cooling capacities from 5kW up to 1500kW and intended for use with standard refrigerants, ammonia, and carbon dioxide.

One of the cornerstones of Mistral condensers/dry coolers range is the new high efficient heat exchangers with up to 6kW/l performance and reduced refrigerant charge.

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Air-cooled condenser

New air-cooled condensers with microchannel coils and high-performance EC fans


Kaltra Innovativtechnik, a Germany-based cooling specialist, today has released the new CNM Series air-cooled condensers intended for use with various HFC and HFO refrigerants. Thank microchannel condenser coils, introduced condensers have a 25% smaller footprint and 20% less weight in comparison to the previous generation. New condensers are equipped with high-performance fans with EC motors as a standard.

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Free cooling chiller

Microchannel coils in free cooling applications


Air-based free cooling uses low-temperature ambient air as a cooling medium for chilled water systems, thus providing significant opportunities to generate energy savings. The more time the chilled water system can operate in the free cooling mode, the higher the energy savings it can deliver.

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Precision air conditioner

New direct expansion air conditioners with microchannel evaporators


Following the launch of super-efficient Lambda DX precision air conditioning systems, Kaltra has released the new family of compact air conditioners intended for data center and IT cooling applications using elevated return air temperatures.

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Precision air conditioner

Kaltra launches new range of high-efficient precision air conditioners


Kaltra Innovativtechnik, a Germany-based provider of innovative thermal management technologies and advanced cooling equipment, today released the Lambda DX/DXU family of feature-rich, high-end direct expansion (DX) precision air conditioners with innovative microchannel evaporators and dual refrigerant circuit amongst many of its features.

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Server rack cooling door

Kaltra launches high-efficiency rack cooling door solution to target data center hotspots


Kaltra Innovativtechnik, a Germany-based cooling specialist, has launched its chilled water rack-based cooling solution intended for use in high-density data center applications. The development of the In-Rack solution is in response to growing demand for high-density cooling solutions from the data center sector for energy savings and reduction in carbon emissions.

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Evaporative fluid cooler

New fluid coolers to be available in Q4 2016


Jumbo Cooler fluid coolers are intended for cooling process water in industrial, commercial, and free cooling applications, and features the benefits of evaporative cooling with water recirculation, thus minimizing energy and water consumption and offer increasing free cooling hours.

Jumbo Cooler units are equipped with evaporative pads wetted via the water distribution system to pre-cool the air before passing through the heat exchanger coils. This increases the amount of heat the air can extract from the coil and, in turn, increases the cooling capacity of the unit.

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Microchannel evaporator

Advanced microchannel technology for HVAC and process cooling


The HVAC and process industries are making a transition to microchannel heat exchangers. This is evidenced by the extensive use of microchannel condensers by major HVAC manufacturers and many smaller OEMs manufacturing cooling and refrigeration equipment. Significant energy efficiency improvements drive the trend, the need for smaller equipment footprints and weight, conversion to lower GWP refrigerants, and the ongoing rise in the cost of copper.
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Microchannel heat exchanger

Methods of microchannel coils defrosting


Microchannel coils are becoming quite popular as an alternative to bulky fin/tube heat exchangers. For desired capacity, microchannel coils are smaller in size compared to a fin/tube heat exchangers, resulting in less refrigerant charge in the system.

The most frequent issue with which users are faced when considering microchannel coils for some applications, like heat pumps, is the issue of a shorter frosting time compared to fin/tube coils, and the further reduction in time, with each cycle due to residual water retained at the end of each defrost cycle.

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Air-cooled chiller

V-shaped microchannel coils for chiller applications


The efficiency of air-cooled chiller is dictated by the condensing temperature, which may be decreased with increasing heat transfer performance of the condensing coil. Microchannel heat exchangers have become popular in chiller applications due to better thermo-hydraulic characteristics in comparison to conventional finned tube heat exchanger designs. The most straightforward way to improve heat exchanger performance is to increase its face area by combining two microchannel coils in V form.

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Microchannel heat exchanger

Microchannel coils add dimension for cooling systems



by Steven Wand

Although not traditionally used in industrial process applications, microchannel designs may offer advantages over traditional coil technologies in most process cooling applications. Long considered a coil technology primarily used in commercial and residential air-conditioning, microchannel coils are being used by more manufacturers who have discovered how they can improve process cooling applications.

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Microchannel heat exchanger

Microchannel coil: fix or replace


by Lance Robinson

I vote for fix. Anytime you can fix a condenser as opposed to replacing it, is a good day for all in the repair business. Less time = more money. Customers are happier and all around better vibe. Replacement of perfectly good coil makes no sense. Instead make the fix in less than 5 minutes with a propane torch and a few simple instruments all HVAC techs have on hand.

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Microchannel coil

The most advanced microchannel technology comes to Europe


Alcoil, York, PA, one of the world’s foremost manufacturers of microchannel heat exchangers for condenser, evaporator, heat pump and water coil applications, and Kaltra, a developer and manufacturer of innovative cooling solutions, announced a new broad partnership.

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Microchannel heat exchanger

Formicary corrosion



Approximately 10% of heat exchanger failures are connected with leaks caused by formicary corrosion. Organic compounds remain on copper tubes during manufacturing and fabrication of the HVAC equipment, are able to advance to formicary corrosion only with the simultaneous presence of moisture, oxygen, and acids. Read more

Microchannel heat exchanger

Aluminum coils: recommendations for cleaning


by Carter Stanfield

Aluminum coils are here to stay. Not only have they been applied successfully for years by Kaltra in their spiney fin condenser coils, they have also been used for years as evaporator coils in refrigerators.

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Microchannel coil

Microchannel coils fast becoming industry standard


Since the introduction of the next generation all-aluminum microchannel coils, their acceptance in the process and HVAC industries has been nothing short of remarkable! The microchannel coil advantages are the future and rapidly becoming the norm because of the many benefits they provide in new HVAC equipment.

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Evaporative air handler

Evapair: new generation evaporative air handler


Evaporative cooling takes advantage of using water for humidification of warm and dry air and leads to significant energy savings in data center applications.

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Microchannel coil

Field tests for evaluating microchannel heat exchangers with variable fin pitch


Field tests for evaluating microchannel heat exchangers with variable fin pitch (VFP-MCHE) performance have been started this week. VFP-MCHE design features variable fin pitches and dimensions, tube geometries, port shapes, and the location of fins and tubes within the same heat exchanger core.

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Raised floor

Raised floor systems


Kaltra offers a full range of comprehensive raised floor solutions specifically designed for use in commercial buildings, data centers, clean rooms, and industrial facilities where strength and durability are critical.

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Turbocor chiller

Environment-friendly R1234ze chillers with oil-free centrifugal compressors


The Lightstream Turbo chiller family has been designed with attention to every detail to maximize operational reliability. It is ideally suited to the requirements of mission-critical applications like data centers, telecom facilities and clean rooms, and in every area where reliability is a crucial factor.

Due to its excellent efficiency at part-load conditions, the Lighstream Turbo chiller is a brilliant economy solution for applications where the heat load is not constant or expected to increase.

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Microchannel coil

Microchannel heat exchangers: advantages and benefits


All-aluminium microchannel heat exchanging products are now being widely used in the HVAC industry: they provide higher performance, smaller size, features and capabilities not found in traditional fin/tube heat exchangers.

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LPG recovery plant cooling

Lightstream Scroll chillers for LPG recovery process


With its installation experience and technical expertise, Kaltra was chosen by the customer to assist in the development of the new chilled water production plant for the LPG recovery facility at the GP2Z industrial zone, Algeria.

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Evaporative cooling solutions

Kaltra expands its business in the segment of evaporative cooling


In line with its growth strategy, air conditioning and refrigeration specialist company Kaltra is laying the organizational foundations for further business diversification and market expansion. In addition to its existing core business areas, Kaltra has now also started in the evaporative cooling sector with its newly introduced product lines.

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Equipment maintenance

Predictive maintenance programme


The cost of mission-critical facility failure is huge and constantly increasing. The standard practice for most cooling facilities provides real-time management and monitoring of critical process equipment, but low tiered equipment is deemed too difficult to monitor. However, these uncontrolled equipment assets may cause a serious cooling process disturbances and loss of efficiency. The best method of equipment failure prevention is to institute a preventive maintenance program.

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Technical support

Kaltra launched a 24/7 hotline for its customers in Germany


Kaltra launched a 24/7 hotline for its customers in Germany, aiming to provide comprehensive and improved technical support.

Moving its services to address more businesses and markets and further strengthening their support, Kaltra, a Germany-based HVAC specialist that delivers innovative products to consumers and businesses, announces a new 24/7 hotline for its customers in Germany, aimed to provide improved support for partners and customers.

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