Aermec launches water-to-water heat pumps with up to 889 kW capacity

Aermec has introduced two high-temperature water-to-water heat pump ranges for industrial heating, centralized heating systems and building refurbishment. The HWSG_H series offers heating capacities of approximately 145 kW to 450 kW and water temperatures of up to 80 C. The larger WFGN_H range covers approximately 443 kW to 889 kW, with outlet temperatures of up to 85 C, according to the manufacturer.

HWSG_H models use inverter-controlled screw compressors, electronic expansion valves and plate heat exchangers on both the source and heating sides. Depending on the model, they have one or two refrigerant circuits; Aermec says the dual-circuit design supports continuity and performance at partial load.

The WFGN_H range consists of five dual-compressor models with screw compressors and shell-and-tube heat exchangers. Aermec says this configuration provides higher capacity, redundancy and flexibility in managing loads. The units can use either R1234ze, an A2L refrigerant with a global warming potential below 2, or R515B, an A1 refrigerant with a GWP below 300. The manufacturer says R1234ze models require additional leak-detection and ventilation safeguards.

Both refrigerant options include electronic expansion valves and are available in standard or acoustically enclosed low-noise versions. An optional four-pass condenser is offered for applications requiring a greater temperature difference in the water and lower flow rates.

Aermec says the heat pumps are intended for industrial processes and for replacing conventional boilers in existing buildings that retain high-temperature radiators or other heating terminals. The company has not published performance coefficients, dimensions, weight or sound levels for the new ranges.

For comparison, Aermec’s previous HWSG series had COP values of 4.41 to 4.62 with heating water temperatures of 40 C to 45 C and source water temperatures of 10 C to 7 C. Its reported SCOP values for 55 C heating applications under average climatic conditions ranged from 4.53 to 4.73.

Sources: pv magazine.