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Abstract
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An integrative renewable energy supply system has been designed and proposed as an effectinve solution to address high building energy consumption. This system efficiently provides electricity, heat and cold by integrating various clean energy such as wind, solar, hydrogen, geothermal energy. Technical and economic analyses have been conducted to optimize the integration of these renewable sources. Rigorous system modeling and dynamic simulation using TRNSYS software comprehensively evaluate the seamless integration and optimal operation of the photovoltaic/thermal (PV/T) subsystem within the combined cooling, heating, and power (CCHP) system. The interaction between the PV/T subsystem and borehole heat exchanger (BHE) coupling has been investigated, analyzing their influence on individual system performance. Furthermore, key performance indicators, including overall electricity consumption (OEC), life cycle cost (LCC), heat pump coefficient of performance (COPHP), and system coefficient of performance (COPSYS) are meticulously examined. A robust methodology that combines response surface methodology (RSM) and Box-Behnken experimental design approach is employed to ensure accuracy. The model's predicted values show remarkable agreement with the simulated values, with a maximum deviation of only 1.45%. The optimal configuration includes a PV/T area of 132m², 20 wind turbines, 12 alkaline fuel cells, and 17 borehole heat exchangers, yielding highly favorable outcomes: an OEC of -35648.72 kW∙h/year, an LCC of $209113.85, a COPSYS of 2.91, and a COPHP of 3.82. Furthermore, a detailed assessment of system's performance shows the feasibility and stability of the proposed integrated energy supply systems for buildings.
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