高海拔地区太阳能与空气源热泵供暖系统适用性分析

Study on Applicability of Heating Technology of Solar Energy and Air-source Heat Pump in High-altitude Area

采用TRNSYS 18软件,对拉萨、灵芝、昌都等高海拔地区典型建筑模型的供暖季热负荷进行模拟计算,对比分析了不同集热场面积和辅助热源供热量条件下系统的运行能耗、太阳能保证率等参数,从太阳能保证率、投资回收期等角度分析了太阳能光热与空气源热泵联合供暖系统的适用性。结果表明:集热场面积增大到一定程度后,系统的太阳能保证率趋近于100%,可基本实现太阳能独立供暖。集热场面积不断增大不一定具备经济性优势,当拉萨、灵芝、昌都地区的集热场面积分别达到25、35、45 m^(2)时均可取得最短的投资回收期,分别为4、7.5、4.6 a,经济性最优。

The TRNSYS 18 software is used to simulate the seasonal heat load of typical building models in high altitude areas such as Lhasa,Lingzhi and Qamdo.The operating energy consumption,solar guarantee rate under the condition of different collector area and the amount of auxiliary heat source are compared and analyzed.The applicability of the combined solar thermal system and air-source heat pump heating system is analyzed from the perspective of solar guarantee rate and payback period.The results show that when the collector area increases to a certain extent,the solar fraction of the system is close to 100%,and the independent solar energy heating can be basically realized.The increment of collector area does not necessarily have economic advantages.When the collector area of Lhasa,Lingzhi and Qamdo reaches 25,35 and 45 m^(2),respectively,the shortest payback period can be achieved,which is 4,7.5 and 4.6 years,respectively,and the economical efficiency is optimal.