Implementation of Geothermal Cooling to Prevent CPVT Overheating When Used for Building Heating, Electrical Generation and Hot Water Supply

Document Type : Original Article


Independent Researcher


 A solar-powered photovoltaic thermal concentration (CPVT) system will be installed in a Tehran, Iran, house to provide the occupants with hot water and space heating, and this study will examine the resulting energy usage. The CPVT system employs triple-junction solar cells and linear Fresnel concentrators (LFCs). To boost electricity generation, a geothermal cooling system was proposed. The EES brings together the many LFC simulation models. Auxiliary heaters are offered in case solar energy is insufficient. The usage of thermal energy storage (TES) tanks is offered as a remedy in the event of an excess of solar thermal. Here, we test out a setup where concentrated thermal collectors are used instead of a geothermal cooling system. We also look into the use of triple-junction photovoltaic thermal technology (PVT). TRNSYSY is used to do transient simulations of such systems. The proposed system generates 4.44 MWh of electricity, which is sufficient to meet 47.1% of the building's energy needs. As 47 percent of the solar energy is transformed into thermal energy and 12 percent into electrical energy, this system achieves an efficiency of 59 percent. The existing system in fig. 1 provides 92.12 percent of the thermal energy for the building's municipal hot water demands and accounts for 32.61 percent of the required heating energy. The study's power is sold at a premium, and only 23.37 percent of the thermal energy produced by the CPVT system will be utilised.


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  • Receive Date: 04 February 2023
  • Revise Date: 16 February 2023
  • Accept Date: 19 February 2023