air types of space heating systems.
in this manner, the system is usually called a
solar-assisted or solar-augmented heat pump
Solar-assisted heat pump systems are
configured in many different ways. For example,
the solar collectors can be either water or air
types; the heat storage medium can be water or a
solid material, such as rock or brick; and the heat
pump can be of either the air-to-air design or the
water-to-air design. But heat pumps have a
that can limit their effectiveness: the
efficiency and capacity of a heat pump decrease
the temperature of the heat source (usually
outdoor air) decreases. This deficiency can be
overcome, however, by using solar collectors to
gather the energy of the sun to keep the heat
source in the temperature range required for
efficient heat pump operation.
The pipes and pumps of the liquid types of
solar systems are replaced by air ducts and fans.
The warm-air system is obviously the best heat
for use with an air type of solar
heat delivery system.