INVERTER SCREW CHILLERS

Lightstream Screw Inverter

Air-cooled chillers with inverter controlled screw compressors which deliver energy efficient cooling across a wide capacity range and load requirements

500-1400kW

PRODUCT OVERVIEW

An ideal choice for variable-demand applications

Lightstream Screw Inverter chillers deliver efficient operation by adjusting the compressor speed to actual cooling demand. Combined with the latest condenser technology and close approach evaporators, these R1234ze-based chillers offer decreased energy consumption and stable water temperatures, particularly at partial load under low water temperature conditions, and help customers to reduce operating expenses and environmental impact.

In addition, the chillers have many unique options and accessories which satisfy the customers' demand to design tailored solutions.

Inverter screw compressors

The compact frequency-controlled screw compressors of Lightstream Screw Inverter chillers are particularly suitable for systems that are frequently operated under part-load.

 

These compressors also achieve impressively high full-load efficiency and significantly improved ESEER/IPLV and SCOP values. With an average ESEER value above 5.5, Lighstream Screw chillers are setting new benchmarks in the industry.

 

The compressor monitors its own application limits and communicates via Modbus with the master system controls. The integrated data log can be used at any time to analyze operation over the running time and optimize the system settings.

EXCELLENT EFFICIENCY UNDER PART LOAD CONDITIONS

Power-saving fans

EC-TYPE FANS WITH REDUCED POWER CONSUMPTION

Lightstream Screw’s new intelligent fan system consisting of the profiled, sickle-shaped axial fans, multifunctional air guide vanes, and diffusers - provides maximum flexibility, lowest possible sound emission and highest energy efficiency.

 

Modern EC motor technology not only produces savings in full-load operation - it is exactly when operating under partial load that electronically commutated motors lose much less of their efficiency.

 

EC motor controls features thermal management and fan frost protection ensures stable operation in extreme ambient conditions.

Flooded evaporators

GENERATES ENERGY SAVINGS ALL YEAR ROUND

The flooded evaporator used in Lightstream Screw Inverter chillers enables operation at the higher saturated evaporating temperature when compared to many other evaporator types and allows a  higher cooling capacity to be achieved with correspondingly higher degree of efficiency.

 

The refrigerant pool in the shell behaves as a flywheel, allowing the controls of the flooded evaporator to successfully track the varying load of a batch process. In order to avoid preferential flows, Lightstream’s evaporators have optimized tube geometry, ensuring optimal refrigerant distribution.

Microchannel condensing coils

MODULAR W-BANK DESIGN
LOWER CONDENSING TEMPERATURES
ENHANCED HEAT TRANSFER

All-aluminium microchannel condensing coils used in Lighstream Screw Inverter chillers allows achieving the number of advantages, including low airside pressure drops, higher heat transfer rate, and closer approach temperatures.

 

The end result is up to 40% higher energy efficiency in comparison to fin/tube coil design. Smaller coil surface area, thin design, up to 50% less weight, and less refrigerant charge translates to lower cost.

 

Due to the all-aluminium construction, microchannel condensing coils are subject to significantly less galvanic corrosion than traditional fin/tube design, in that there are no dissimilar metals.

Green R1234ze solution

ENVIRONMENT-FRIENDLY REFRIGERANT WITH LOW GLOBAL WARMING POTENTIAL

The proposed phase-down of HFC refrigerants has prompted an assessment of alternative fluids for a wide range of applications, including medium-temperature air-cooled chillers.

 

Recently developed R1234ze refrigerant features low global warming potential and zero ozone depletion potential and fulfils EU regulatory requirements for reducing the use of high global warming potential (GWP) substances. At the same time, R1234ze almost exactly matches the efficiency of R134a.

 

With R1234ze, Lightstream Screw Inverter chiller provides the environmental leadership while achieving the best energy performance levels for applications.

Lightstream Screw Inverter has been designed with attention to every detail to maximize its reliability and fits ideally with 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 under part-load conditions, Lighstream Screw Inverter is a brilliant economy solution for applications where heat load is not constant or expected to increase.

PRODUCT SPECIFICATIONS

Cooling capacity

500-1400kW

EER

Up to 3.56

ESEER

Up to 5.75

Compressors

Inverter screw

Refrigerant

R134a / R1234ze

Condensers

MCHE

Evaporators

Flooded

Fan type

AC/EC

Heat recovery

Available

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Kaltra Innovativtechnik GmbH


Max-Reger-Str. 44
90571 Schwaig
Germany


Email: info@kaltra.de
+49(0)911 715 32021

VAT: DE300943964

Kaltra is a customer-focused developer and supplier of reliable, energy efficient thermal management equipment and solutions.

 

From the professionalism of our research and development engineers to the wide experience of our service team, we are dedicated to delivering you the best service possible.

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