研究目的
Investigating the performance of the PV-PCM system under real weather conditions to mitigate the efficiency reduction of photovoltaic panels due to temperature rise.
研究成果
The latent heat capacity and the natural convective effect of PCM play important roles in cooling the PV temperature. The temperature of PV can be reduced by up to 24.9°C through adding PCM, increasing electricity output by 11.02%. However, the economic viability of the system is currently limited by the high price of PCM.
研究不足
The study indicates that currently the PV-PCM system might not be economically viable due to the high price of PCM, suggesting the need for massive production to improve economic performance. A year-around numerical and experimental study is recommended for a comprehensive techno-economic evaluation.
1：Experimental Design and Method Selection:
A one-dimensional PV-PCM thermal resistance model was developed, incorporating the PCM convective effect by using the enhanced conductivity method. The model was utilized to analyze the daily energy performance of several PV-PCM systems with varied thickness.
2：Sample Selection and Data Sources:
A prototype of the PV-PCM system was constructed with PCM thickness ranging from 10 mm to 40 mm. The PCM applied was RT35HC, a paraffin wax produced by RUBITHERM Technologies.
3：List of Experimental Equipment and Materials:
PV panel, PCM (RT35HC), MATLAB R2018a for simulation.
4：Experimental Procedures and Operational Workflow:
The simulation time started from 6am to 6pm, with solar radiation and ambient temperature simulated as sine functions. The system's initial temperature was assumed as 25°C.
5：Data Analysis Methods:
The impact of PV temperature increase on power output was analyzed, showing the PV efficiency drops as the temperature rises.
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