Kaltra - Model 300-1600kW -Lightstream Screw Chillers

Innovative chiller solution designed for efficient and reliable cooling

Lightstream Screw chiller family is exceptionally reliable air-cooled chillers offering a wide range of cooling capacities and featuring a huge array of accessories, including partial and total heat recovery.

Lightstream Screw chillers combine all the latest compressor, fan and heat exchanger technologies available. Lightstream Screw users can choose from either R134a or low-GWP, ozone-friendly R1234ze refrigerants.

Driven by screw compressors
LATEST SCREW COMPRESSOR TECHNOLOGY
Lightstream Screw chillers feature compact semi-hermetic screw compressors are distinguished by a further improvement in energy efficiency at full and part load conditions. Moreover, the application limits have been substantially extended towards low condensing temperatures as well as to high pressure ratios – without compromises regarding operating reliability.

As a result, these compressors exceed the international efficiency standard of compact screws with respect to the seasonally weighted energy requirements to an even higher degree than before. This results in particularly high ESEER/IPLV and SCOP values.

The cooling capacity of the compressor is controlled by a slider which allows an adaptation of the compressor displacement to the power requirement by shifting the start of the compression process through axial movements of the control slider. The slider, starting from the full load position (100%) can be positioned to nominal 75%, 50%, and 25%.

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.

• Cooling capacity 300-1600kW
• EER Up to 3.36
• ESEER Up to 4.75
• Compressors Screw
• Refrigerant R134a / R1234ze
• Condensers MCHE
• Evaporators Flooded
• Fan type AC/EC
• Heat recovery Available