研究目的
Investigating the performance improvement of a photovoltaic system in a tropical climate using water cooling method.
研究成果
The water-film cooling system on the front surface of the solar panels can reduce the thermal stress and non-uniform temperature distribution across the solar panels. The optimal cooling water flow rate is 6 L/min, which can improve the power generated by 32 W per 260-W-rated-PV-module at 1150 W/m2 solar irradiance, equivalent to a performance improvement of 15%. The net energy gain per panel per hour was 0.0178 kWh at 1150 W/m2 solar irradiance. The local rainfalls can cover the water consumption needed for the cooling system.
研究不足
The study was conducted in a tropical climate, and the results may not be directly applicable to other climates. The optimal cooling water flow rate was found to be 6 L/min, but further research is needed to determine the long-term net energy gain and at which solar irradiance the water pump should be switched on.
1：Experimental Design and Method Selection:
A water-film cooling system was installed onto a retrofitted rooftop PV system to investigate its performance improvement.
2：Sample Selection and Data Sources:
Four units of 260 W silicon crystalline solar panels were used.
3：List of Experimental Equipment and Materials:
Solar panels (model MYS 60 CF-260), I-V curve tracer (PVPM1040X), temperature sensors (DS18B20), thermography camera (FLIR i5), digital water flow meters, micro-inverters (Hoymiles MI-500), power meter, cell-type solar irradiance meter (S0Z-03), weather station.
4：Experimental Procedures and Operational Workflow:
The solar panels were fixed onto the mounting rack with a 10 cm gap from the metal decks at a 10° tilted angle. PVC pipes were drilled with 3 mm diameter holes and a spacing of 2 cm between holes, then clamped on the top of the solar panels. A water pump was used to supply cooling water from a water tank to the solar panels.
5：Data Analysis Methods:
The temperature data were collected and recorded with an interval of 15 seconds. The power output from the solar panels and the energy produced were measured at a 5-minute interval.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
