Abstract
In order to provide basic data for the museum air-conditioning system and energy conservation design, this paper presents an analysis of the measurements over a one-year period of the actual performance of a museum air-conditioning system. In spite of the fact that the museum is situated in a relatively cold area, two air source heat pumps cooperating with a stratified-type heat storage water tank were adopted as heat source. A water source heat pump was also installed for the simultaneous occurrence of cooling and heating loads due to dehumidification or room temperature adjustments in the storehouses and exhibition rooms. A monthly analysis of the annual energy production showed that 82.4% of the amount of hot heat produced by this system and 87.4% of the amount of cold heat were sent to the secondary side, with 57.7% of the amounts of cold and hot heat consumed by the storehouses and the exhibition rooms. The COP of the air source heat pumps was 3.1〜3.3 for chilled water production, and 2.3〜3.2, normally, for hot water production, and declined by 20% during defrosting operation. The COP of the water source heat pump was 3.4〜4.4 on the hot water side and 2.4〜3.0 on the chilled water side. The heat storage tank effective volume rate was 58.6% in winter and 76.2% in summer. Furthermore, the annual system COP was 2.45.
