摘要
以夏热冬冷地区的典型居住建筑为例,利用TRNSYS软件研究光伏/光热−地源热泵(PV/T-GSHP)联合供热系统的运行性能以及主要设计参数(PV/T组件面积、地埋管间距和地埋管长度)对联合供热系统运行性能的影响。研究结果表明:PV/T-GSHP联合供热系统能有效保证土壤热平衡,系统运行20 a后土壤温度仅增加0.8℃;PV/T-GSHP联合供热系统的热泵机组季节能效比相对于传统地源热泵(GSHP)系统提高43.8%,与独立光伏(PV)系统相比,PV/T组件的光伏电池最高温度降低约35℃;当PV/T组件面积增加至屋顶面积的2/3时,热泵出水温度大于5℃;当PV/T组件满屋顶安装时,太阳能保证率接近100%;地埋管间距对PV/T-GSHP联合供热系统的太阳能保证率影响很小,可以忽略;在不同的PV/T组件面积下,热泵机组季节能效比均随地埋管长度增加而小幅度上升。
Based on the TRNSYS software and a typical residential building in the hot summer and cold winter zone,the operation performance and main design parameters(PV/T module areas,gaps and lengths of ground pipes)for photovoltaic/thermal-ground source heat pump(PV/T-GSHP)hybrid heating system were analyzed.The results show that the soil heat balance can be well guaranteed by the PV/T-GSHP hybrid heating system,and the soil temperature only increases by 0.8℃after 20 years of operation.The seasonal COP of heat pump unit increases by 43.8%compared with that of the traditional GSHP system,and the annual peak temperature of PV cells decreases by 35℃compared with that of the stand-alone PV system.The outlet water temperature of the heat pump unit is greater than 5℃when the PV/T module area is 2/3 of the roof area.When the PV/T module area is full of the roof,the solar fraction is close to 100%,and the influence of ground pipe gaps on solar fraction of PV/T-GSHP hybrid heating system is small enough to be ignored.The seasonal COP of heat pump unit increases slightly with the increase of buried pipe length in different PV/T module areas.
作者
刘仙萍
雷豫豪
田东
郝小礼
廖胜明
LIU Xianping;LEI Yuhao;TIAN Dong;HAO Xiaoli;LIAO Shengming(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Engineering Research Center for Intelligently Prefabricated Passive House,Xiangtan 411201,China;School of Energy Science and Engineering,Central South University,Changsha 410083,China)
出处
《中南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2021年第6期1892-1900,共9页
Journal of Central South University:Science and Technology
基金
湖南省自然科学基金资助项目(2017JJ3090)
湖南省教育厅科研项目(19A180,17C0649)
湖南科技大学科技项目(E56125)。