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Heat source air
Air heated by the sun is universally
available. even at temperatures as low
as –20 °C, heat pumps yield sufficient
heat from the outside air. However, air
as heat source has the disadvantage
that it is coldest when the highest
heat demand arises. Although it is
still possible to extract heat from air
as cold as –20 °C, the heat pump
coefficient of performance is, however,
regressive in line with the outside
temperature. it is for that reason,
that in most cases a combination
with a second heat source is required
that boosts the heating system,
particularly during the colder season.
one particular benefit is the ease of
installation of air | water heat pumps,
as no extensive ground work or well
drilling is required.
Heat source water
Groundwater is a good store of solar
energy. even on the coldest days in
winter, temperatures of +7 °C to +12
°C are achieved - and this is where
its advantage lies. the near constant
temperature level of this heat source
enables the heat pump to achieve a
favourable coefficient of performance
all the year round. regrettably,
groundwater of adequate quality is
not universally available. where it is
available, its utilisation is certainly
worthwhile. the use of groundwater
requires the approval of your local
water board [check local regulations].
Utilising this heat source requires the
drilling of a delivery and return well.
Your local water board will advise you
about the possibility of utilising these
waterways.
EnErgy SoUrcES for HEat pUmpS
Main layout of an air source heat pump system
Main layout a groundwater heat pump system
Содержание Heat pumps
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Страница 234: ...234 www stiebel eltron COM WPF E mono mode without buffer cylinder WPF E mono mode with DHW heating ...
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