Heizen mit Naturwaerme 02-2011_GB.indd - Viessmann

Introduction
Heat pump
VITOCAL
Simple principle, great result
The technical principle of a heat pump is similar to that of a fridge –
it just works the other way round.
In a fridge, heat is transferred from the
inside to the outside. With a heat pump,
this happens exactly the other way round.
The heat from outside – for example from
the ground – is transferred via the heating
system to the inside, into the living space. To
raise the temperature, a refrigerant vapour
is compressed until the temperature for
central and DHW heating is reached. With
the Vitocal 300-G and Vitocal 350-A, this can
even be up to 65 °C. This means this heat
pump can also be used for modernisation
projects.
Highly efficient scroll compressor
The compression process is vital for the
efficiency of a heat pump. Viessmann heat
pumps use a Compliant scroll compressor
that is comprised of two interlocking spirals
that continuously compress the refrigerant.
Compression process
65 °C
Ground
Temperature all year round between 5 and 18 °C (at 2 m depth)
Getting hotter towards the centre – from an initial
temperature of between 5 and 18 °C, a flow temperature of
up to 65 °C is achieved.
As with a bicycle pump, the temperature also
rises with increasing pressure. This ensures
efficient temperature raising from the cold
side (the heat source on the outside) to the
hot side (the heating circuit in the building).
Compliant scroll compressors as used by
Viessmann is that they operate quietly and
with low vibrations, are maintenance free and
extremely durable.
You won't need to worry about heating
bills any more
An investment in a Viessmann heat pump
will always be worthwhile because you won't
have to pay for any more fuel from day one.
From now on, the energy you use to generate
heat comes free, from right outside your door.
Furthermore, the power needed to exploit this
free fuel is very efficiently used. From one
kilowatt of power, a heat pump can generate
between 3 and 4 kW of heat.
A heat pump can make use of the
following energy sources:
Air as energy source:
Practically unlimited availability; lowest
investment costs
Ground as energy source:
Via geothermal collector or geothermal probe;
very efficient
Water as energy source:
Extremely efficient; observe water quality
Waste heat as energy source:
Subject to availability, volume and
temperature level of the waste heat
The best heat source for each individual case
depends on local conditions and the actual
heat demand.