22 May 2008

TESTING A PROTOTYPE GAS-FIRED RESIDENTIAL HEAT PUMP


A new gas-fired absorption heat pump has been developed for residential
application, providing both space heating and cooling. ECN has tested a prototype in one of
its research dwellings. A direct water-to-water configuration was applied for heating, for
cooling an indirect air-to-air configuration. Both ground heat exchangers and outdoor air have
been applied as energy source. The experiments showed promising results, regarding
energy performance, thermal comfort and reliability. Furthermore two cooling distribution
systems have been compared: air cooling versus floor cooling. Compared to air cooling, the
floor cooling reached similar thermal comfort (and cooling power) at a significantly higher
supply temperature (generally resulting in a better energy performance for heat pumps).