hajdu HP-TOWER HPT200C Manuel De Mise En Service, D'opération Et D'entretien page 66

HPT 200 • HPT 200C
3. OPERATION OF HEAT PUMPS
At fi rst sight, the HPT200(C) heat pump water heater is similar to traditional electric hot
water tanks. During its normal operating cycle, the HPT200(C) connected to house-
hold pipeline and electrical power system does not use as much electric power for the
direct heating of water as traditional electric hot water tanks, but rather, it uses energy
in a more reasonable and effi cient way, reaching the same result with an energy use of
less than 70%, as compared to the traditional electric hot water tank.
Heat pump is named after the fact that it is capable to transfer heat from a heat source
of lower temperature to a heat source of higher temperature, i.e. it reverses natural
fl ow of heat, which goes the higher temperature source to the lower temperature one,
as we already know. The application of the heat pump brings the benefi t that it is able
to transfer more energy (in form of heat) than the energy it takes for its operation (in
form of electric power). This way, heat pump is able to extract energy from heat sourc-
es existing in its environment without "expenditure", depending on the type and avail-
ability of the heat sources.
The HPT200(C) heat pump water heater extracts heat from stuff y internal air to be re-
freshed, thus it increases the effi ciency of water heating. It is possible to select from
several diff erent confi gurations for the use of environmental air, which enables various
applications of the appliance adjusted to the diff erent operating conditions.
The HPT200(C) heat pump water heater has been planned and manufactured to speci-
fi cations relating to the energy performance of buildings. The appliance eables a more
rational energy use and results in operational cost savings. As opposed to other alter-
native systems used to produce sanitary hot water, heat extraction from free energy
sources defi nitely reduces the environmental eff ects of emissions into the atmosphere.
Based on the facts mentioned above, the "energetic capacity" of heat pumps is based
on heat transfer through heat extraction from a free source (in this case, the environ-
mental air) with lower temperature than the material to be heated (in this case, the
water in the tank of the water heater). Electricity is required for the operation of the
compressor (that causes the change of physical state of the cooling fl uid in the cooling
circuit), and thus, the transfer of heat energy. The cooling fl uid passes along a closed
hydraulic circuit, where the fl uid changes into liquid or gaseous physical state, subject
to its temperature and pressure. The main components of the hydraulic circuit (Figure
3.2.-1) are as follows:
1 – compressor that enables the completion of the cycle by increasing the pressure
and the temperature of the cooling fl uid (which is of gaseous physical state in this
cycle).
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3.1. Operating principle
3.2. Description of operation