News aus Wärmepumpen- Forschung und -Markt - FWS

News aus Wärmepumpen-Forschung
und -Markt
17. Tagung des BFE-Forschungsprogramms
«Wärmepumpen, Wärme-Kraft-Kopplung,
Kälte» 29. Juni 2011, HTI Burgdorf
Seite 43
�
share solar knowledge with Heat pump experts and vice versa. The nick name of the activity
is therefore T44A38.
IEA T44A38 scope
The scope of this new Task, which has begun in 2010, is on the following items:
� Small-scale residential heating and hot water systems that use heat pumps and any
type of solar thermal collectors as the main components.
� Systems offered as one product from a system supplier/manufacturer.
� Electrically driven heat pumps, but during the development of performance
assessment methods thermally driven heat pumps will not be excluded but are seldom
proposed yet.
� Market available solutions and advanced solutions (produced during the course of the
Task).
To better focus on the current market demand which is on one family solutions, large scale
systems i.e. systems using any type of district network or systems for large buildings are not
directly included, nor is the comfort cooling of buildings. However a heat pump can also be
used for cooling, and the performance assessment methodology of T44A38 will not forget this
“optional” feature.
Companion technologies?
Solar and heat pump technologies share some common points:
� Both solar collectors and heat pumps use electricity to make „free“ energy available
for hot water and space heat
� In both cases, the „free“ resource varies with the seasons in terms of exergy (quality)
� Both have decreasing efficiency with increasing supply temperature
� Both have relatively high capital costs and lower running costs compared to
conventional heating systems
� Both use thermal storage in systems.
The optimisation of one technology will therefore often help the other one and it makes much
sense to look at both in a consistent and global way. On top of that, they have
“complementary disadvantages” such as: