This research aimed to experimentally study of solar panel efficiency with water cooling. Three mono-crystalline solar panels with the capacity of 80 W (for each panel) were used for this test. The first panel was a solar panel without water cooling. The second panel was a panel with water spray cooling. The last panel was a solar panel with water drop cooling. The cooling water flow rate was varied to 50 75 and 100 LPH. From the test it was found that the temperatures of all solar panels had the similar trends. The solar panel efficiency decreased when the temperature of solar panel increases. The solar panel efficiency increased when the cooling water flow rate was increased for both of water spray cooling and water drop cooling. For all water cooling flow rates the water spray cooling solar panel performed higher efficiency than water drop cooling solar panel. The highest solar panel efficiency in this test occurred when the water spray cooling flow rate of 100 LPH.

This research is studied the design and contract the electronic generator from Solar cell integrated with electrical at home in the rural area. The design is combined between solar cell and electrical at home. The mutation from solar cell to electric power is the clean and green energy when it is compared with normal processes to generate the electric power. Additionally it’s also less impacts to environment and sustainable. In the normal architectural model of solar cell generator the engineer will design the power storage at its battery for one day using with condition of the solar cells need to receive the sun light in the whole day. If some days the cell cannot get enough sunlight when it’s bad weather the battery also cannot supply power as in its usual. With this new innovative energy supply integration between solar cell and electrical at home it benefits to the energy consumers to get the energy for whole day continually and also reduce the pollution from the normal process electric generation.

This paper presents a prototype of solar powered aerator for public reservoir which consist of three main parts first aerator-venturi type second electrical system from solar panels and third floating structures. The proposed aerator has been adopted from an used electric water pump to have a water inlet an air inlet and mixture air and water outlet releasing bubbles through under water. Electrical system acting as the core energy resource receives light of solar energy via 2x120 watts solar panels and then accumulating the obtained electric energy to battery. The 24-volt battery will supply power to 150 watt directed current motor for driving the venturi aerator. To archive evaluation the combined aerator with solar system has been installed at Nong Luang reservoir in Muang Tak province and has operated for 30 minutes. To collect water samples have been done twice times at before and after operation. The obtained laboratory results show that dissolved oxygen (DO) increased from 0.87 mg/l to 3.56 mg/l and the biological oxygen demand (BOD) decreasee from 9.7 mg/l to 7.2 mg/l. According to the results it confirms that the proposed solar powered aerator for public reservoir can operate efficiently and independently.