Heat pumps
Cooling with heat pumps
Alongside pleasant heating convenience and reliable DHW heating, heat pumps also
provide cooling for a building.
No-one would turn on the central heating on
a hot summer day. With a Viessmann heat
pump, the situation is different, as some
types offer an additional cooling function.
Active or passive cooling
Cooling operates according to two different
methods:
n Passive cooling: This is where the brine
medium or the groundwater absorbs the
energy from the heating circuit via a heat
exchanger and transfers it outside. This
function is also called natural cooling, as
it uses the natural ambient temperature.
Apart from the control unit and circulation
pump, the heat pump remains switched
off.
n Active cooling: For this, the function of the
heat pump is simply reversed. This method
of cooling can be described as "reverse
operation". This means that the refrigerant
circuit is reversed internally or reversal is
achieved by an external changeover of the
primary and secondary circuits. As with a
fridge, cooling is then actively generated
by the heat pump.
Natural cooling – naturally
While the ground or groundwater is used
in winter to provide energy for heating, in
summer it can be used for natural cooling.
With the natural cooling function, the control
unit only starts the primary pump and heating
circuit pump. This means the relatively hot
water from the underfloor heating system
can transfer its heat via the heat exchanger to
the brine in the primary circuit. This extracts
heat from all rooms that are connected, which
makes natural cooling a particularly energy
efficient and affordable way to cool buildings.
To Next Page
Loading...
