Influencing factors of cross-season heat storage system of solar coupled backfill heat pump
In order to determine the influence of parameter selection of cross-season heat storage system of solar coupled backfill heat pump on the change of backfill temperature field and heat storage/release effect,multi-factor studies on collector area,storage tank volume to collector area ratio,backfill thermal conductivity,buried pipe spacing and buried pipe thermal conductivity were carried out by orthogonal test method,and the optimal scheme was selected.The cross-season heat storage system of solar cou-pled backfill heat pump was designed by building load and modeled by TRNSYS software,and then the five-level and five-factor orthogonal test was carried out.The optimal parameter scheme was obtained by selecting the heat storage rate and the power consumption ratio of the system,and the ten-year opera-tion simulation was carried out.The results show that the collector area and the thermal conductivity of the backfill have significant effects on the heat storage rate of the backfill,but the ratio between the volume of the storage tank and the collector area has little effect.The collector area,the thermal con-ductivity of the backfill and the thermal conductivity of the buried pipe have significant effects on the ratio of heat storage and power consumption,while the ratio of the volume of the storage tank to the col-lector area and the distance between the buried pipes have little effects.By comparing the optimized scheme with the original scheme,the heat storage rate is increased by 12.65％.The heat storage and power consumption ratio is decreased by 28.17％,the collector heat and the backfill heat storage are increased by 30.73％and 39.49％,respectively.After optimization,the application value of the system is significantly improved,which provides theoretical support for the later research of solar coupled backfill heat pump system.
万方数据
维普
