研究目的
To utilise solar energy more efficiently by developing a single pass hybrid photovoltaic thermal system suitable for the climatic conditions of Bangladesh, focusing on improving the efficiency of photovoltaic modules through cooling and maximizing solar energy exploitation.
研究成果
The designed solar hybrid PV/T system demonstrated significant improvements in efficiency, with a maximum combined efficiency of 39.68% and up to 45.76% when glycerin was added to water. The system's feasibility was supported by CFD simulation and economic analysis, indicating potential as a sustainable energy source for rural areas in Bangladesh.
研究不足
The study was conducted under specific climatic conditions in Bangladesh, which may limit the generalizability of the findings to other regions. The experimental setup was relatively small-scale, and the long-term durability and maintenance requirements of the system were not fully explored.
1：Experimental Design and Method Selection:
The study involved the development of a hybrid photovoltaic thermal (PV/T) system using air as a cooling medium for the solar panel and a circular copper tube for water heating. The system was designed to be self-powered using the photovoltaic panel's power to circulate air.
2：Sample Selection and Data Sources:
The experiment was conducted from June 2017 to November 2017 in Rajshahi, Bangladesh, under ambient environmental conditions. Data on temperature, power output, and efficiency were collected over four experimental days.
3：List of Experimental Equipment and Materials:
The system included a photovoltaic module, a solar air heater, a solar water heater with a copper tube, a dc motor (fan), a battery, and a charge controller. Sensors for temperature, humidity, and solar intensity were also used.
4：Experimental Procedures and Operational Workflow:
The system's performance was evaluated by measuring the temperature of air and water, the power output from the PV cell, and the overall efficiency of the hybrid system. Glycerin was added to water in a 1:50 ratio to enhance heat transfer.
5：Data Analysis Methods:
The efficiency of the PV cell, air heater, and water heater was calculated using specific equations. Computational fluid dynamics (CFD) analysis was performed using ANSYS software to simulate and validate the experimental findings.
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