基于寒冷地区季节性蓄热太阳能-土壤源热泵系统太阳能集热器设计参数研究

Research on Design Parameters of Solar Thermal Collectors Based on Seasonal Heat Storage Solar-Soil Source Heat Pump System in Cold Areas

基于TRNSYS平台以土壤热平衡为目标搭建季节性蓄热太阳能-土壤源热泵系统模型进行模拟动态研究。用DeST软件模拟寒冷地区住宅建筑负荷,提出一种面积匹配法,即通过模拟建筑全年累积冷热负荷差、太阳能集热器单位面积平均日得热量和预期蓄热天数确定太阳能集热器面积Ac,以土壤平均温度偏移率绝对值小于1%为判定依据,Ac增减10%不断调整从而确定新的太阳能集热面积,最终找到最佳匹配面积。本文通过对住宅建筑案例说明了本方法的实用性。最佳匹配面积的太阳能-土壤源热泵系统既解决传统土壤源热泵在寒冷地区长周期运行条件下的冷积累问题,又避免了土壤的热积累现象,为寒冷地区季节性蓄热太阳能-土壤源热泵系统需确定的太阳能集热器面积设计提供方法。

Based on the TRNSYS platform, a seasonal heat storage solar-soil source heat pump system model was constructed with the objective of soil heat balance to simulate dynamic researches. DeST software is used to simulate the load of residential buildings in cold regions, and an area matching algorithm is proposed in this paper to determine the solar collector area Ac by simulating the cumulative cold and heat load of the buildings throughout the year, the average daily heat gain per unit area of solar collectors and the agreed terms of thermal storage. By taking the fact that the absolute value of the soil average temperature deviation rate is smaller than 1% as the basis for determination, Ac could increase or decrease by 10% with constant adjustment, so as to determine the new solar collector area and finally find the optimum matching area. This article illustrates the practicality of this method through a case of residential buildings. The solar-soil source heat pump system with the optimum matching area not only helps to solve the problem of cold accumulation byf traditional soil-source heat pumps under cold-cycle conditions, but also avoids the phenomenon of heat accumulation in the soil. It is a seasonal heat storage solar-soil source in cold regions. The heat pump system needs to determine the method of designing the solar collector area.