STIEBEL ELTRON Heat pumps, Technical Manual

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SIzIng of HEat pUmpS
Sizing of heat pumps
some electricity supply utilities can
shut down the power supply of heat
pumps for specific periods in return
for favourable tariffs. However, the
heat demand of the building must be
covered 24 hours per day. that means
that the building heating load must be
raised by a factor of 1.1.
Q
HP
= Q
nbuil.
x 1.1
Air | water heat pumps
the heating output of air | water
heat pumps is subject to the
outside temperature. this has the
disadvantage that the heating output
of the heat pump also falls with
falling outside temperatures, whilst
the heating load actually increases.
this is why air | water heat pumps are
operated in mono-energetic mode.
Brine | water or water | water heat
pumps
As the heat source offers a near
constant temperature throughout the
year, the heating output of the heat
pump is constant. these heat pumps
are operated in mono-mode.
Sizing air | water heat pumps
Sizing brine | water heat pumps
Sizing water | water heat pumps
Air inlet temperature °C
He
ating output (k
w
)
Heat source temperature °C
He
ating output (k
w
)
Heat source temperature °C
He
ating output (k
w
)