Energy-Efficient Use Of The Heat Pump; Purpose Of The Heat Pump; Application; Operation Principle - Dimplex SI 130TUR+ Instructions D'installation Et D'utilisation

1.4 Energy-Efficient Use of the
Heat Pump
By operating this heat pump you contribute to the protection of
our environment. The heating or cooling system and the heat
source must be properly designed and dimensioned to ensure ef-
ficient operation. In particular, it is important to keep water flow
temperatures as low as possible. All energy consumers con-
nected should therefore be suitable for low flow temperatures. A
1 K higher heating water temperature corresponds to an in-
crease in power consumption of approx. 2.5 %. Low-temperature
heating systems with flow temperatures between 30 °C and
50 °C are optimally suited for energy-efficient operation.
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. The mixture of water and
frost protection (brine) acts as a heat transfer medium in the heat
source system. Ground probes, ground heat collectors or similar
systems can be used as heat source systems.
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2.2 Operation 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 low temper-
ature by the brine circulating in the ground collector, ground coil
or similar device.
A circulating pump then conveys the warmed brine to the evapo-
rator of the heat pump. There, the heat is given off to the refriger-
ant in the refrigeration cycle. When so doing, the brine cools so
that it can again take up heat energy in the brine circuit.
The refrigerant is drawn in by the electrically driven compressor,
is compressed and "pumped" to a higher temperature level. The
electrical power needed to run the compressor is not lost in this
process, but most of the generated heat is transferred to the re-
frigerant.
Subsequently, the refrigerant is passed through the condenser
where it transfers its heat energy to the heating water. Based on
the thermostat setting, the heating water is thus heated to up to
58 °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.
2.3 Functional description for
integrated thermal energy
metering
The compressor manufacturer's performance specifications for
different pressure levels are stored in the heat pump software.
Two additional pressure sensors for determining the current
pressure level are installed in the refrigerating circuit, one before
and after the compressor. The current heat output can be calcu-
lated from the compressor data stored in the software and the
current pressure level. The integral for the heat output over the
runtime gives the quantity of thermal energy supplied by the heat
pump, which is displayed separately for heating, domestic hot
water preparation and swimming pool water preparation on the
manager's display.
452234.66.36 · FD 9311
SI 130TUR+
EN-3