Performance Simulation And Experimental Study On Space Cooling Radiator

With the improvement of people's living standards,the demand for energy is gradually increasing.With the exploitation and consumption of a large amount of energy,shortage of resources force people to seek for more environmentally friendly and clean technologies.The technology of extracting natural cold energy for building refrigeration has also gradually attracted attention.Passive cooling technology realizes cooling by consuming no or only a small amount of energy.As one of the passive technologies,space cooling radiator is based on the heat loss principle of long-wave radiation,which enables the heat of objects to pass through the " atmospheric window" with a wavelength of 8~13?m in the form of infrared radiation heat transfer and be distributed into space,thus realizing free refrigeration.In this paper,the following research work has been carried out on the performance simulation and comprehensive utilization of space cooling radiator:1.The heat transfer process and heat transfer mechanism of space radiation technology are studied,and the mathematical model of space cooling radiator is established.The finite element method numerical heat transfer model is established by Fluent software,which can iteratively solve the outlet temperature and heat transfer performance of space cooling radiator according to hourly meteorological conditions.2.Based on the theoretical research results,a space cooling radiator with simple structure,low cost and suitable for practical application is proposed,and a set of space cooling radiator experiment table is designed and built.The actual operation data can be collected by the data acquisition system of the experimental table,which proves that the designed space cooling radiator can achieve good heat dissipation performance.In addition,hourly experimental conditions such as flow rate,circulating water inlet temperature and meteorological data are substituted into the established simulation model,and comparing thecalculated numerical simulation results with the experimental data,the reliability of the established mathematical model is verified..3.Using the verified mathematical model,the effects of different parameters on the space cooling radiator performance are studied.The results show that: The greater the cooling flow rate of the inlet of the space cooling radiator,the smaller the heat exchange temperature difference;The cooling water temperature of the outlet of the space cooling radiator increases with the increase of refrigerator area.The increase of outdoor ambient wind speed will make the heat exchange effect of space cooling radiator worse.The heat transfer effect of radiator is affected by outdoor humidity.The thicker the cloud layer,the worse the refrigeration performance of the radiant cooler.4.The application of space cooling radiator in practical engineering is discussed.This paper discusses the application of space cooling radiator in practical engineering,and puts forward a theoretical model that space radiant cooler can eliminate heat at night through passive refrigeration assisted active system,or combine with energy storage system to reduce daytime cooling load of buildings.In this paper,the heat transfer principle,numerical modeling,process design,system construction,experimental research and practical application of the passive refrigeration technology of space cooling radiator are explored through the performance simulation and experimental research of radiator.The research found that the space cooling radiator can achieve better cooling effect,and the research results are helpful for the popularization and application of space radiant cooling technology in the field of building air conditioning.