In extreme cold areas,solar energy is introduced by adding auxiliary heating means,and the solar energy resources in transition seasons are skillfully used to preheat the soil and store heat inside,so as to enhance the overall operating efficiency and energy utilization rate of the system in winter,thus solving the problem that the energy efficiency of the ground source heat pump system is directly weakened in extreme cold areas because of the obvious imbalance of cooling and heating loads. A typical three-story office building in Shenyang is selected as the load simulation case,and the operating characteristics of the solar-ground source heat pump composite system in the period of 15 years are calculated by transient system simulation software. The system can effectively raise the soil temperature,and the COP of the system increases by 6.7％ in winter and 3.8％ in the whole year,which verifies the feasibility of reducing the number of buried pipes by heat storage. In order to reduce the total cost of the system,the area of solar collectors and the number of underground pipes are optimized,and the optimal combination of the costs of different collectors and underground pipes is proposed,and the methods and strategies of applying the ground source heat pump system suitable for severe cold areas are analyzed.
ground source heat pumpsolar-ground source heat pumpcomposite systemTRNSYScold region
NETL
NSTL
万方数据
