At present, the widespread use of solar energy. Since Thailand is located in or near the equator in the heat. The solar energy is about 5.05 kWh / m2 of solar power is to be utilized in various fields. This research was conducted to study the performance of a solar hot water system with Solar Collector Flat pattern 2m2. The pump size 0.20 kW electricity, solar water heating with heat pump size 3.04 kW These data are used to calculate the coefficient of performance of the heat pump and the efficiency of the solar panel from the analysis showed that the heat pump coefficient. The performance of the system is in the range from 4.2 to 5.5 the efficiency of solar energy in the range from 43.8 to 52.6% of the electricity consumption of the year. When the water temperature from 30C. To replace the old system of slaughtered animals using a 30 kW electric heaters produce hot water at a temperature of 62 ° C in a boiled wool spinning pigs and modular. Larger water volume 2.4 m3, which is the cost of each month, about 12,000 - 18,000 baht will consider the technology of hot water from the appropriateness of the technology used and the evaluation of economic studies have found that one can choose water system. Optimum and reduce the amount of electrical energy to produce hot water is solar hot water system. The expenditure bill per month is about 200 - 300 baht and hot water system with a heat pump with power bills per month, about 400 - 500 baht.
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