STUDY ON EFFECT OF WORKING MEDIUM ON PERFORMANCE OF MICRO HEAT PIPE PV/T SYSTEMS

Wang Hongyang; Li Jinping; Vojislav Novakovic; Ehsan Gholamian Karkon; Zhu Junjie

doi:10.19912/j.0254-0096.tynxb.2024-0268

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 329-336. DOI: 10.19912/j.0254-0096.tynxb.2024-0268

STUDY ON EFFECT OF WORKING MEDIUM ON PERFORMANCE OF MICRO HEAT PIPE PV/T SYSTEMS

Wang Hongyang^1,2, Li Jinping^1,2, Vojislav Novakovic³, Ehsan Gholamian Karkon³, Zhu Junjie⁴

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Abstract

Combining theoretical analysis, a comparative experimental study on the performance of R141b micro heat pipe photovoltaic/photo-thermal （MHP-PV/T） system and acetone MHP-PV/T system was conducted under different installation inclinations, circulating water pump flow rates and other operating conditions in the summer of 2023. The photoelectricity, photothermal, and overall performance of R141b and acetone MHP-PV/T systems were analyzed. The results indicate that at a 40° inclination angle and an average ambient temperature of 30.2 °C, R141b micro heat pipes exhibit better heat transfer characteristics, resulting in superior thermoelectric co-generation performance of the R141b MHP-PV/T system. At this point, the average thermal power, average electrical power, average thermal efficiency, and average electrical efficiency of the R141b micro heat pipe PV/T are 321.9 W, 118.9 W, 35.2% and 12.9%, respectively, which is 51.9 W, 54.7 W, 6.5% and 5.6% higher than that of acetone MHP-PV/T respectively. In this study, the performance differences between R141b MHP-PV/T and acetone MHP-PV/T systems were compared, and it is found that R141b micro heat pipe has better heat transfer performance compared to acetone micro heat pipe, and the R141b MHP-PV/T system has better cogeneration performance. Compared with acetone, R141b is more suitable to act as the working fluids of the MHP-PV/T system.

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solar energy / photovoltaic thermal / heat pipes / working medium / heat transfer

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Wang Hongyang, Li Jinping, Vojislav Novakovic, Ehsan Gholamian Karkon, Zhu Junjie. STUDY ON EFFECT OF WORKING MEDIUM ON PERFORMANCE OF MICRO HEAT PIPE PV/T SYSTEMS[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 329-336 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0268

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