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2 Purpose of the Heat
Pump
2.1 Application
The brine-to-water heat pump is to be used exclusively for the
heating and cooling of heating water. It can be used in new or
previously existing heating systems. Brine is used as the heat
transfer medium in the heat source system. Borehole heat ex-
changers, ground heat collectors or similar systems can be used
as the heat source.
2.2 Operating Principle
Heating
The heat generated by the sun, wind and rain is stored in the
ground. This heat stored in the ground is collected at a low tem-
perature by the brine circulating in the ground heat collector, the
borehole heat exchanger or a similar system. A circulating pump
then conveys the “heated” brine to the evaporator of the heat
pump. There the heat is given off to the refrigerant in the refriger-
ating cycle. This cools the brine so that it can once again absorb
thermal energy in the brine circuit.
The refrigerant is drawn in by the electrically driven compressor,
compressed and “pumped” to a higher temperature level. The
electrical power needed to run the compressor is not lost in this
process. Most of it is absorbed by the refrigerant.
Subsequently, the refrigerant is passed through the condenser
where it transfers its heat energy to the heating water. Depend-
ing on the set operating point (thermostat setting), the heating
water is thus heated up to a max. of 60 °C.
Cooling
The functions of the evaporator and the liquifier are reversed in
the “Cooling” operating mode.
The heating water gives up its heat to the refrigerant via the liqui-
fier which is now functioning as an evaporator. The refrigerant is
pumped to a higher temperature level using the compressor.
Heat passes into the brine via the liquifier (evaporator in heating
operation) and consequently into the ground.
3 Basic Device
The basic device consists of a ready-to-use heat pump for indoor
installation, complete with sheet metal casing, control panel and
integrated control system. The refrigerant circuit is hermetically
sealed. The refrigerant circuit is hermetically sealed. It contains
the Kyoto protocol approved refrigerant R407C with a GWP
value of 1525. It is CFC-free, does not deplete ozone and is non-
flammable.
All components required for the operation of the heat pump are
located on the control panel. The power feed for the load current
and the control current must be installed by the customer.
The collector including the brine manifold must be provided by
the customer.
1)
Liquifier
2)
Control panel
3)
Compressor
4)
Heating pump
5)
Evaporator
6)
Primary pump
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