COOL GAS
HOT GAS
HEAT
EXCHANGER
EVAPORATOR
COLD LIQUID
REFRIGERANT
HIGH PRESSURE SIDE
CONDENSED
REFRIGERANT
AMBIENT
AIR
LOW PRESSURE SIDE
WATER OUT
WATER IN
1
2
3
4
COMPRESSOR
EXPANSION
VALVE
THE HEAT PUMP CYCLE
The CALOREX Swimming Pool Heat Pumps provides ermodynamic heating
by means of a vapour compression cycle, (similar to at employed in a
conventional refrigerator), in addition to operating as an active solar collector.
2 The COMPRESSOR where it is compressed and upgraded
to a much higher temperature. The hot vapour now enters -
1 The EVAPORATOR collects e heat from e outside ambient air,
pre-heated by e sun. In e Calorex swimming pool heat pumps, high
volumes of outside air are drawn into e unit by e fan and expelled
rough e evaporator fins. The evaporator has liquid refrigerant passing
rough it which is at a considerably lower temperature an e ambient
air. Therefore e air gives up its heat to e refrigerant which en
vaporizes. This pre-heated vapour now travels to -
3 The CONDENSER where it is surrounded by e pool water.
e heat is given up to e cooler pool water and e now cold
refrigerant returns to its former liquid state but still under high
pressure from e compressor.
This pressure is released by passing e liquid rough -
4 The EXPANSION DEVICE and from ere, now at normal
pressure, it is returned to e evaporator and e cycle starts
again.
COEFFICIENT OF PERFORMANCE
The eciency of a Heat Pump is usually called its ‘Coecient of Performance’
- (C.O.P.) which is simply a ratio of heat output to energy input, bo being
expressed in kW. Thus a Heat Pump absorbing 1 kW of electricity, collecting 4
kW of energy from e air, and delivering 5 kW of heat to e pool water is said
to have a C.O.P. of 5:1.
Naturally is ratio will vary according to e temperature of e ambient air.
NOTE THAT WHEN A HEAT PUMP IS CHILLING THE CYCLE IS REVERSED
6
SD331852 ISSUE 7
OWNER INSTALLATION MANUAL 634ACH/ACL/AHC /1222AC/1234BC/BHC /1834BHC /PP22BC
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