Feasibility Analysis of Utilizing the Concrete Pavement as a Seasonal Heat Storage Device for the Ground-Coupled Heat Pump System

摘要

For the buildings located in northern areas of china, which belong to the cold climate, their heating loads always larger than the cooling loads in 1 year. When the ground-coupled heat pump (GCHP) systems are utilized in these so-called "heating load dominated" buildings, the unbalance between the heat released into ground in summer and the heat extracted from ground in winter will result in the performance degradation of the GCHP systems year-by-year. In order to ensure the high heating efficiency of the GCHP system used in heating load dominated buildings, it is important to storage the heat into ground to achieve its heat balance. This paper proposes a new type of concrete pavement heat storage system combined with the GCHP system for buildings located in cold climate areas. The operating principle as well as heat transfer mechanism of pavement heat storage system is introduced, the heating capacity of pavement heat storage system is calculated and compared with residential building's heating load. Based on simulation results, the feasibility of utilizing the concrete pavement as a seasonal heat storage device for the GCHP system is analyzed.