研究目的
To examine, numerically and experimentally, the performance evaluation of a low concentration photovoltaic/thermal (LCPV/T) module under different operating conditions (fixed flow & outlet temperature) and to study the influences of individual parameters on module performance.
研究成果
The module performance is significantly influenced by radiation intensity and flow. The experiments conducted over the course of a full day show that the electrical and thermal power increases first and then decreases with time. The maximum experimental values were 470 W and 1916 W, respectively. The electrical and thermal efficiencies decrease first and then increase with time. The maximum experimental values were 17.28% and 59.84% respectively. The results showed that the relative error between the modified theoretical value and the experimental value is stable within 5%.
研究不足
The theoretical model has errors between 10% and 20% compared to experimental values, especially at high radiation intensities and flow rates due to temperature gradients in the PV panel and heat transfer limits of the cooling structure.
1：Experimental Design and Method Selection
The study involved numerical simulation and experimental analysis of an LCPV/T system under real operating conditions. A theoretical model was developed and numerically solved using MATLAB to assess the overall performance.
2：Sample Selection and Data Sources
Experiments were performed in Changping, Beijing, China, under different working conditions including fixed flow and fixed outlet temperature conditions.
3：List of Experimental Equipment and Materials
The system consists of the LCPV/T module, pump, electric regulating valve, flow meter, water tank, photoreceptor, biaxial tracking system, etc. The water is used as the working fluid.
4：Experimental Procedures and Operational Workflow
The module performance was investigated under different flowrates and fixed outlet temperatures. The electrical and thermal outputs were measured over the course of a full day.
5：Data Analysis Methods
The comparison between theoretical values and experimental values of module performance was studied under different working conditions. Modification coefficients were determined to correct the theoretical model.
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