GEA recently outlined the benefits of its new HA44e compressor for low temperature applications.

As part of continuous optimization, the new semi-hermetic air-cooled HA44e compressors, based on the suction gas-cooled compressor technology of the GEA Bock HG44e series, will replace the proven HA4 compressor series.

Together with the already optimized HA22e and HA34e series, the HA44e compressors now complete the new GEA Bock HAe series.

The current program offers 3 model sizes with 10 capacity stages from 11.1 to 57.7 m3/h (50 Hz).

Low-temperature applications place greater demands on compressors. In this application the refrigerant mass flow is smaller and is heated up disproportionately by the drive motor.

This results in higher discharge gas and oil temperatures. The oil ages more quickly and the lubrication properties deteriorate.

The “HA principle” (Hermetic Air-Cooled) of air-cooled compressors, specially developed by GEA, is the most efficient semi-hermetic solution for low-temperature applications, the company said.

It employs a direct-suction compressor combined with an air-cooled drive motor. The suction gas is not heated additionally, but rather fed directly into the cylinders without diversions via the motor.

A compact ventilation unit is integrated to cool the motor and provide air flow for the cylinder heads, partially cooling them as well.

This solution reduces the discharge temperature, increasing capacity and extending the range of applications.

The air-cooled HA principle results in lower discharge temperature, which is particularly advantageous in operation with new low GWP transition R404A replacement refrigerants, according to GEA product manager, Dalibor Sandor.

"This series also offers higher efficiency, especially compared to compressor models that are forced to use liquid injection for gas cooling," Sandor explains.

“GEA's efficient and sustainable energy concepts offer solutions with short payback periods that aim to reduce the total cost of ownership and CO2 emissions of their customers.”


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