Simulation Of Sky Radiation Refrigeration System Based On Transpired Collector

In China,about 1 / 3 of the total social energy consumption is used for building energy consumption,and the energy consumption for heating in winter and cooling in summer accounts for the largest proportion.In order to reduce building energy consumption,it is imperative to develop renewable energy.Permeable solar collector is a kind of air type solar collector,which has the characteristics of high efficiency,simple structure and strong adaptability.It has been widely studied in China.However,permeable solar collector can not be used in summer,which has the disadvantages of low utilization rate and long payback period.Sky radiation refrigeration technology is a kind of passive refrigeration method,which means that the ground object dissipates heat to low temperature outer space by long wave radiation,so as to obtain refrigeration effect.Due to the similar structure and complementary working time of the two systems,it is possible to realize solar energy collection and sky radiation cooling simultaneously.The development of permeable collector for sky radiation refrigeration can improve the utilization rate of collector,increase energy saving,and effectively make up for the shortcomings of permeable collector.Based on the idea of comprehensive application of solar energy collection and sky radiation refrigeration,this paper proposes a sky radiation refrigeration system based on flat plate permeable collector.On the premise of ensuring the normal solar energy collection of the penetrating collector,the system uses its idle time for sky radiation cooling in summer,so that the UTC system can realize multi-function,multi period and multi season use,improve the energy utilization rate of the system,shorten the investment recovery period of the device,and promote the development and utilization of renewable energy.In this paper,the sky radiation refrigeration system based on permeable collector is studied as follows1.Aiming at the advantages and disadvantages of the application of the flat plate permeable collector,a sky radiation refrigeration system based on the flat plate permeable collector is proposed.2.According to the basic principles of flat plate permeable collector and sky radiation refrigeration,the mathematical model of sky radiation refrigeration system based on flat plate permeable collector is established,and the model is verified according to the previous experimental results.3.According to the established model,the influence of collector parameters and meteorological conditions on the refrigeration performance of the system is simulated,and the parameters suitable for the operation of the system are obtained.By comparing the influence of parameters on the system performance in winter and summer,the feasibility of the winter and summer dual-use of the flat plate permeable collector is verified.The energy saving of the whole year is predicted.4.Combining the sky radiation refrigeration system with night ventilation based on the flat permeable collector,the application analysis is carried out in three typical cities of Beijing,Fuzhou and Urumqi,and the UTC precooling night ventilation simulation is carried out by using the Energy Plus simulation software,which provides a reference for the application of the system under different climatic conditions.