上海地区复合式太阳能-地源热泵季节性蓄热供热系统的模拟研究

Simulation Study on Seasonal Heat Storage and Heating System of Hybrid Solarwith Ground-source Heat Pump in Shanghai

本文以上海地区复合式太阳能-地源热泵季节性蓄热供热系统为研究对象,在蓄热模式和供热模式这两种运行模式下,利用TRNSYS软件建立系统模型,研究该系统在一个完整的蓄热季和供热季下,土壤温变特性、系统能量损失和系统热效率随时间的变化规律。结果表明:上海地区复合式太阳能-地源热泵季节性蓄热供热系统在蓄热季可实现土壤蓄热温度45.7℃,蓄热季土壤蓄热率为42.70%,蓄热效果良好。同时在供热季实现高效的热量供给,供热季太阳能保证率为0.3。系统全年性能系数(Coefficient of Performance,COP)为3.76,具有良好的节能效果。

In this paper,the hybrid solar-ground heat pump and seasonal energy storage system in Shanghai with the heat storage model and heating operation models is taken as the research object.The system model is established with the TRNSYS software to study the soil temperature,system energy and thermal efficiency variation under a complete storage and heating season.The results show that the hybrid solar-ground heat pump and seasonal energy storage system in Shanghai have good heating storage performance,the average soil storage temperature can be up to 45.7℃and the average soil heat storage rate is 42.70%during the storage season.This system also can achieve a high efficiency heating supply during the heating season with 0.3 solar fraction.The system coefficient of performance(COP)during the whole year is 3.76,and the system energy conservation effect is significant.