Rointe Dalis Pro 200DHW5, Инструкция по эксплуатации

Страница: 5 / 56

5
DALIS PRO DOMESTIC HOT WATER HEAT PUMP EN
4. PRINCIPAL FUNCTION
A heat pump is capable of transferring thermal energy from a low temperature source to
another with a higher temperature and vice versa. It uses circuit consisting of a compressor,
an evaporator, a condenser and a throttle valve. A liquid/gas coolant flows inside this circuit.
The compressor creates a difference in pressure inside the circuit that allows a thermodynamic
cycle to be obtained. This sucks the coolant fluid in through an evaporator, where the fluid
itself evaporates at a low pressure by absorbing heat; it is compressed and driven towards
the condenser where the fluid condenses at a high pressure releasing the absorbed heat.
After the condenser, the fluid passes through the so-called “throttle valve” and by losing
pressure and the temperature starts to vaporize, it re-enters the evaporator and the cycle
starts all over again.
I-II: The coolant fluid sucked in by
the compressor, flows inside the
evaporator and while it evaporates,
it absorbs the “ecological” heat
given by the air. At the same time,
the ambient air is sucked in by the
equipment by a fan; the air loses
its heat by passing over the finned-
tube battery of the evaporator;
II-III: The coolant gas passes inside
the compressor and it undergoes
an increase in pressure that causes
a rise in temperature; transforming
this into superheated steam;
III-IV: Inside the condenser, the
coolant gas releases its heat to
the water inside the tank (boiler).
This exchange process makes it possible for the coolant to pass from superheated steam to a
liquid state by condensing at a constant pressure and undergoing a reduction in temperature;
IV-I: The liquid coolant passes through the throttle valve. It undergoes a sudden drop in
both pressure and temperature and it partially vaporizes bringing pressure and temperature
back to the initial conditions. The thermodynamic cycle can begin.
Fig 1 - Principal function of a heat pump