SGCHPS土壤蓄热供热供冷效果分析

Effect analysis on heat storage in soil, heating and cooling for SGCHPS

摘要:

为减少建筑供热供冷能耗,实现严寒地区太阳能-土壤源热泵系统(SGCHPS)对建筑进行长期稳定的供热供冷,提出依靠季节性太阳能土壤蓄热来维持土壤热平衡、提高系统效率的方法．以严寒地区太阳能-土壤源热泵供热供冷示范工程为平台,根据建筑负荷确定系统配置,并选定4种模式交替运行,进行了3年的长期实验．实验结果表明:季节性蓄热SGCHPS能够使房间达到室内设计温度,供热保证率和供冷保证率分别为92.0％和84.1％;热泵能效比为4以上,含蓄热能耗的全年供热能效比达到6左右,而供冷能效比达到20以上．该系统保持长期稳定运行,能够满足严寒地区(如哈尔滨)独立建筑的供热供冷需求,季节性太阳能土壤蓄热充分利用了全年的太阳能,提高了系统效率,节能效果显著．

Abstract:

To reduce energy consumption of buildings on heating and cooling, and to achieve long-term stable heating and cooling using solar-ground coupled heat pump system (SGCHPS) in severe cold zone, a method of depending on seasonal solar heat storage in soil was put forward to maintain soil heat balance and increase system efficiency. Long-term experiment of 3 years was carried out relying on a demonstration project of solar-ground coupled heat pump for heating and cooling in severe cold zone. The system configurations were determined according to the building load, and 4 modes were selected to operate alternately. The experimental results showed that SGCHPS with seasonal heat storage could make the room achieve indoor air design temperature, and the guaranteed rate of heating and cooling were 92.0％ and 84.1％, respectively. The energy efficiency ratio (R_EE) of heat pump was more than 4, the annual heating EER including the power consumption of heat storage was about 6, and the cooling EER was more than 20. The system operated stably for a long period, and could meet the heating and cooling demands of a detached house in severe cold zone (e.g. Harbin). Seasonal heat storage took full advantage of solar energy of the whole year, and increased system efficiency. The energy-saving effect was remarkable.