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Various operating parameters affect the performance of photovoltaic thermal systems (PVT-Ss). This paper presents a numerical study to determine the optimal coolant inlet temperature (IT), i.e. whether it should be higher or lower than the ambient temperature. The impact of solar irradiation and cooling water IT on the performance of PVT-Ss is also analyzed, with the aim of identifying the optimum conditions for these systems. The results show that increasing irradiance harms electrical efficiency, decreasing 0.45% when irradiance is increased from 2 * 102 W/m2 to 103 W/m2 at an IT of 27 °C. In addition, it has been shown that thermal efficiency peaks when the input temperature is lower than the ambient temperature. For example, at solar radiation (= 2 * 102 W/m2), the thermal efficiencies are obtained at approximately 68.66% and 66.62% using inlet fluid of 27 °C and 29 °C, respectively.

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Optimizing the Performance of Hybrid Photovoltaic-Thermal Systems by Choosing the Input Temperature

  • 会议论文

  • 发表日期：

    2025年

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  • Yassine El Alami,
  • Ali Lamkaddem,
  • Rehena Nasrin,
  • Fatima Ouerradi,
  • Noureddine El Moussaoui,
  • Fatima Chanaa,
  • Elhadi Baghaz

摘要

Various operating parameters affect the performance of photovoltaic thermal systems (PVT-Ss). This paper presents a numerical study to determine the optimal coolant inlet temperature (IT), i.e. whether it should be higher or lower than the ambient temperature. The impact of solar irradiation and cooling water IT on the performance of PVT-Ss is also analyzed, with the aim of identifying the optimum conditions for these systems. The results show that increasing irradiance harms electrical efficiency, decreasing 0.45% when irradiance is increased from 2 * 102 W/m2 to 103 W/m2 at an IT of 27 °C. In addition, it has been shown that thermal efficiency peaks when the input temperature is lower than the ambient temperature. For example, at solar radiation (= 2 * 102 W/m2), the thermal efficiencies are obtained at approximately 68.66% and 66.62% using inlet fluid of 27 °C and 29 °C, respectively.