Discussion about Applying the Double Stage Coupling Heat Pump System in High-size Buildings in Cold Area

The paper analyzed the characteristics of high-size building heating in cold area.On the basis of this,an ecological cycle heating system,the double stage coupling heat pump system which used air as low-level heat source,was designed.Four kinds of plans and the corresponding terminal devices were provided.The paper also analyzed the installation of outdoor heat exchanger for air source heat pump unit and got the rational and feasible scheme.In the last if this paper,two approaches for promoting the system's SHPF(heating season performance factor) were given.