论文部分内容阅读
为了使土壤源热泵系统能够长期高效的运行,需要保持土壤以年为周期的热平衡,必要时需添加辅助冷热源。本文提出了一种土壤热平衡的评价方法,给出热平衡方程,并定义土壤年热平衡率,得出土壤热平衡点Δ_g~0,浮动范围80%Δ_g~0~120%Δ_g~0,其上下限分别对应冷临界地区和热临界地区。根据示范工程所做出的蓄热、供热、供冷实验数据,得出了系统的热平衡点为80%、浮动范围为65%~95%,这可作为衡量土壤热平衡的指标,并可评价得出太阳能季节性蓄热土壤源热泵(GCHPSSHS)系统适用于我国的严寒地区以及部分寒冷A区。基于年热平衡率的土壤热平衡评价方法可以分析添加辅助冷源和热源的土壤源热泵系统的土壤热平衡问题,并可用于评价系统的地区适用性,设计能保持土壤热平衡的高效系统。
In order for the ground-source heat pump system to operate in a long-term and efficient manner, the annual heat balance of the soil needs to be maintained. If necessary, an auxiliary cold and heat source needs to be added. In this paper, a method of evaluating soil thermal equilibrium is proposed. The thermal equilibrium equation is given and the annual thermal equilibrium rate is defined. The thermal equilibrium point of soil is Δ_g ~ 0 and the floating range is 80% Δ_g ~ 0 ~ 120% Δ_g ~ 0. Corresponds to the cold and hot critical areas. According to the experimental data of heat storage, heating and cooling made by the demonstration project, the system has a thermal equilibrium point of 80% and a floating range of 65% -95%, which can be used as an index to measure soil thermal balance and can be evaluated It is concluded that the solar energy seasonal heat storage ground source heat pump (GCHPSSHS) system is suitable for cold area and cold area A of our country. The soil heat balance assessment method based on annual heat balance ratio can analyze soil heat balance problem of soil source heat pump system with auxiliary cold source and heat source and can be used to evaluate the regional suitability of the system and design an efficient system that can keep the soil heat balance.