Kaltra - Model 500-1400kW -Lightstream Screw Inverter Chillers

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.

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.