摘要
Studies show that the photovoltaic-thermal(PVT)heat pump soil cross-seasonal energy storage system can effectively harness solar energy to supply heating,electricity,and cooling for buildings.The present study investigates a real-world application of this system in Dalian,China,outlining its design framework and optimizing key parameters using orthogonal methods.The factors examined include the area,slope angle,and azimuth angle of the PVT collectors,the flow rate through the PVT collectors,and the depth,spacing,count,and flow rate of the borehole.Through variance analysis,the influence of these parameters is evaluated on heat pump efficiency,soil temperature dynamics,and the system’s investment payback period.Findings indicate that borehole depth and PVT area are the dominant factors affecting the heating efficiency of the heat pump,contributing 66.86%and 16.25%,respectively.In the cooling efficiency of the heat pump,the most significant factors include borehole spacing(31.30%),borehole depth(26.36%),PVT area(16.98%),and borehole flow rate(16.67%).The investment payback period is primarily influenced by borehole depth(41.25%)and borehole quantity(25.24%),with PVT area and borehole spacing contributing 15.34%and 15.18%,respectively.Variations in soil temperature are largely governed by PVT area(40.85%)and borehole spacing(32.75%),followed by PVT slope angle(11.41%)and borehole depth(10.31%).The results of this research provide valuable insights for optimizing the design and implementation of PVT heat pump soil cross-seasonal energy storage systems scientifically and efficiently.
基金
supported by Liao Ning Revitalization Talents Program(Grant No.XLYC1902068)
the Science and Technology Partnership Program,Ministry of Science and Technology of China(Grant No.KY20202012)
the Dalian University of Technology Basic Research Business Expense Project,Green Building Evaluation and BIM Intelligent Operation and Maintenance Control Platform Technology Development Service for Dalian Metro Line 5 Project Control Center of China Railway Dalian Metro Line No.5 Co.,LTD.,Xiajin County Public Medical Center Solar PVT Heat Pump Soil Cross-seasonal Energy Storage Low Carbon Energy Technology Service Project(Grant No.SDLS-2024012).
作者简介
Corresponding author:Jili ZHANG,email:zjldlut@dlut.edu.cn。
