One Of The Mechanisms Of Solar Air Conditioning Hot Water Heat Conditions Energy-saving Control Technology

Solar air-conditioning water system(SAWS), researched in this paper, is an energy-saving mechatronic equipment. This equipment, which combines heat pump technology and solar thermal technology, can not only provide cooling and heating functions, but also handles producing the sanitary hot water. However, the heating performance of the equipment in low temperature circumstance is poor, what's worse, the efficience of heat collecting fluctuates considerably according to the weather condition, which make the control method for the equipment becomes a critical issue when it operates in the heating and water heating working condition(collectively, the heating condition). This paper researched the change of the collected solar energy to the weather condition and put forward a new energy-saving technology for heating condition of the SAWS, which enhances the energy utilization for equipment operating in the winter and transition seasons. The specific work carried out as follows:After analyze the working principle of heating condition for the SAWS, it bring forward a concept that the purpose of control strategy is to maxmize the utility of the solar heating, reduce the enery consumption of the system; Establish the prediction mathematical model for the heating capacity of daily water, heat production of the SAWS in hot water mode and heat produciton of solar energy. Besides, using experimental research methods to optimize the mathematical model, especially utilize the discrete and integral calculation method to predict the production of solar energy.Incorporating the prediction methods it devise an energy-saving control strategy for the system running in heating condition, and give a detailed design of the control flow; Via designing system' s hardware and software, the writer trail-produced a controller prototype, which is installed on a SAWS to run and test.The controller is stable, and the predictive effect is well. The runing test result also show that this congtrol strategy is further energy-saving than the traditional control methods, enhance the energy efficiency of system in heating condition. The research results is significant to energy saving and emission reduction in the field of the air-conditioning and water heating equipment.