Industrial add-on heat pumps with reciprocating compressors

GEA open type heat pumps

The GEA open type heat pump is for heat recovery. It is directly connected to an ammonia refrigeration system that’s used as the heat source. By recovering the chiller waste heat, GEA open type heat pumps provide heating supply temperatures of up to +82 °C.

GEA open type heat pumps are optimized for recovering heat from ammonia refrigeration plants. The hot gas from the refrigeration plant is cooled in an open gas cooler vessel, minimizing the superheat and pressure drop and so establishing perfect conditions for the efficient booster heat pump operation.

The heat pump series is equipped with GEA Grasso 5 HP (50 bar) or GEA Grasso V HP (39 bar) reciprocating compressors in either a single or duplex arrangement. It can be selected in different configurations with desuperheater and/or subcooler for optimized efficiency and reduced energy costs depending on the temperature difference of the heat carrier circuit. Adding a desuperheater allows supply temperatures up to +82 °C with 5 HP compressor and +70 °C with the V HP compressor technology.

GEA open type heat pumps are commonly added to ammonia refrigeration plants condensing between +20 and +40 °C. The heat pump series is supplied with a highly efficient oil separator which minimizes the oil carry-over to less than 5 parts per Million (ppm) and helps eliminate the mixing of oil between the refrigeration plant and the heat pump.

Highlights and technical features

  • Heat recovery from ammonia refrigeration plants
  • Heating capacity 300 kW – 3,500 kW *)
  • Hot water supply temperature up to +82 °C
  • Pressure difference (of compressors) up to 30 bar
  • Natural refrigerant ammonia (R717)
  • Maximum design pressure 50 bar(a)
  • Single or duplex reciprocating compressor arrangement
  • Fully welded plate and shell condenser
  • Heat exchangers are available with AISI 316L, SMO 254 or titanium plate material
  • Different plate materials available (acc. media requirements)
  • Subcooler and desuperheater options
  • Separation vessel (no intermediate heat exchanger to refrigeration plant)
  • Highest efficiencies, also at part load
  • VSD drive

*) Heat carrier +35/+65 °C, LP refrigeration plant condensing +35 °C

Learn more with GEA RT Select – our product selection and configuration tool.

GEA open type heat pumps

Add-on version (cascade evaporator charged wiht ammonia from low-pressure chiller)
Type Heat
carrier (°C)
LP Conden-
sing (°C) 1)
Heating
capacity (kW)
COP 2)
inlet/outlet at 1500 min-1 line
35 HP
+35/+65
+70/+80
35.0
35.0
320
266
8.38
4.78
45 HP
+35/+65
+70/+80
35.0
35.0
426
355
8.33
4.91
55 HP
+35/+65
+70/+80
35.0
35.0
533
444
8.45
4.87
65 HP
+35/+65
+70/+80
35.0
35.0
639
531
5.78
4.29
2x 45 HP
+35/+65
+70/+80
35.0
35.0
828
709
8.19
4.90
2x 55 HP
+35/+65
+70/+80
35.0
35.0
1036
887
8.19
4.89
2x 65 HP
+35/+65
+70/+80
35.0
35.0
1242
1063
8.22
4.93
V300 HP +35/+65 35.0 879 8.51
V450 HP +35/+65 35.0 1317 8.53
V600 HP +35/+65 35.0 1756 8.59
2x V450 HP +35/+65 35.0 2634 8.56
2x V600 HP +35/+65 35.0 3511 8.59
1) Condensing temperature of the low-pressure Ammonia refrigeration system
2) COP (coefficient of performance) = heating capacity / electrical consumption at net

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