The new generation of precision air conditioners includes Delta DX II lineup equipped with fixed-speed scroll compressors and Delta DXi II with inverter-driven compressors. The range with fixed-speed scrolls consists of 28 models from 35 to 135kW in downflow or upflow configurations. Inverter-driven units are available in a capacity range of 30-140kW.
Last month, Kaltra added a free cooling version to its Lightstream Turbo II R1234ze range, targeting hyperscale data centers and critical IT infrastructures.
Amid the global shift towards carbon neutrality, air-source heat pumps (ASHP) have emerged as efficient and environmentally beneficial to traditional boilers, attracting substantial attention in recent years. Contrary to the cooling process, where the condenser is inside, the heating process uses an indoor condenser and an outdoor evaporator in ASHPs.
Designed to meet ambitious efficiency targets and equipped with rotary scroll compressors incorporating intermediate discharge valve (IDV) technology, Easystream Evo is the first series of Kaltra’s 4th generation chillers/reversible heat pumps. It offers cooling capacities from 50kW up to 250kW and up to 20% higher energy efficiency ratios (EER) in the standard version and up to 33% higher EER in its flagship version than the previous range. Even higher efficiencies can be reached in part-load operations.
Brazing is the joining of metals – aluminum, in the case of microchannel heat exchangers – with the use of molten filler metal. During melting, the filler metal spreads between the closely fitted parts and forms a fillet around the joints. This creates a metallurgical bond when cooled.
With expansion of production facilities which included installation of two new CAB furnaces with large indexing grids and intended for high-volume production runs completed in Q2 2023, Kaltra reduced manufacturing time for microchannel heat exchangers by 30%.
Florida is a high-corrosivity region due to several factors, mainly due to marine atmosphere with high airborne salinity, and falls into the range provided for an ISO C3 category classification and even C4 for coastal areas. For C3 category environments, aluminum coils like microchannel heat exchangers without protective coating are unsuitable but are often used because of their low cost compared to coils with electrophoretic epoxy-coated ones. Traditional uncoated copper-aluminum coils demonstrate even worse corrosion resistance in C3/C4 regions.
To expand its presence and the scope of its business in the USA, Kaltra announced opening a hub office in Tacoma, WA, which would primarily be focused on sales and service of heat exchange products.
In May 2023, Kaltra delivered its first Ultracompact-V II chillers, recently upgraded for higher operating efficiency with new control software, twin-slab condenser coils, and high-efficiency packages (optional). These improvements aimed at increasing both cooling capacity and seasonal energy efficiency by 10% and 15%, respectively, compared to the previous generation of Ultracompact-V chillers.
Microchannel evaporators are being increasingly used in air conditioning and refrigeration systems, since they aid in reducing refrigerant charge, enhancing heat transfer performance, lowering tube-side pressure drop, and reducing system size. However, as with other types of evaporators, microchannel evaporators face the issue of refrigerant maldistribution. This phenomenon leads to unequal superheated vapor at tube exits and prevents optimum utilization of the heat exchanger surface.
Kaltra, the leading provider of HVAC equipment and microchannel heat exchangers, today reported financial results for the second quarter of 2022 and increased its year-earnings outlook.
Kaltra has reported a record first quarter with net sales increase of 89% over Q1 2022 and 45% over the previous quarter. Excluding the impact of currency and acquisitions, organic sales increased by 87%. Despite a significant rise in energy costs, Kaltra has delivered sequential sales growth during the past ten quarters.
Cooling season 2023 in the Global North is about to start, and chiller owners and facility operators conduct seasonal maintenance. As is often the case, various issues are detected, including leaks or other damages beyond repair in condenser coils.
The Mistral series is the most popular range of dry coolers offered by Kaltra that includes flat and V-shaped models with finned-pack copper-aluminum coils and capacities of up to 3MW in dry operation.
Microchannel evaporators provide several advantages over traditional coils, the most important of which are high heat transfer rates and low internal volume, and have been widely studied with a focus on refrigerant distribution and condensate behavior. The present study reviews the impacts of refrigerant charge quantity and arrangement of refrigerant inlets and outlets on evaporator performance.
With the launch of Powerstream Turbo II water-cooled chillers this month, Kaltra extends and improves its portfolio for IT- and process cooling applications. In terms of energy efficiency, new chillers are a step ahead of mainstream units available on the market, far exceeding seasonal efficiency levels of EcoDesign 2021 specification.
The portfolio of most demanded direct expansion precision air conditioners is to be modernized in February 2023 and receive the latest generation scroll compressors with inverter drives (ranging in cooling capacity 30-140kW) and fixed-speed (35-135kW), new, compact enclosures, high-speed PLC controllers, and finned-pack or microchannel evaporators (for single-circuit units with capacity up to 75kW).
Kaltra GmbH and its subsidiaries (“Kaltra”) announced fiscal net revenue up 15% from the prior-year period and 4% above the previously provided outlook. This demonstrates a solid end to the fiscal year despite navigating a volatile macro-environment and softening demand in the second half.
