Research On Air-type Solar Water Heating System For Engineering Application

With the growing energy problems and environmental pollution, development and utilization of new energy sources has become a major task.Solar energy is resources inexhaustible, clean and pollution-free, it is the best choice for energy to use, and most of China’s land area has a wealth of solar radiation, solar energy technology is increasingly being valued by the people solar hot water project has been a key topic for researchers.This paper focuses on air-type solar water heating system, and make a series of experimental studies and analysis.The system of air-type collectors are combined with storage technology.The experiment majorly studies the performance changes of in the whole system under different conditions.Such as: under different conditions of solar radiation,that the case of large solar radiation intensity and small solar radiation intensity(rainy days), the changes in the operational efficiency of the entire system, in the efficiency of the collector and the collector efficiency of heat exchanger.Large amount of data obtained by experiment, analyze the data, the following conclusions:1、 the efficiency of the system The efficiency of the hot water system,heat exchanger efficiency and Collection efficiency of the collector are affected on Solar radiation intensity:the greater the intensity of solar radiation, the collector efficiency of heat collector will be greater;Collection efficiency of the heat collector will be affected by haze, when haze becomes more greater,collection efficiency of the collector will be lower.Collection efficiency of the heat exchanger is basically stable, remained at more than sixteen percent.So for the whole solar water heating system, the greater the intensity of solar radiation, the greater the efficiency of the system,when there is haze, it will affect the efficiency of the entire system.2、 the power consumptionKeep the whole system running from eight am to eight pm, it consumed total about 1.5kilowatt hours of energy,got hot water energy about 69 MJ.It equivalent to 19.2kilowatt hours of energy.Therefore, the power consumption of this system is very small, equivalent to 17.7 kilowatt hours of energy savings.This system greatly increases the energy utilization,it meets the energy saving ideas.