The Characteristics Study About Cooling And Heating Of Ceiling Radiation

Radiation air conditioning has a better thermal comfort, high energy efficiency use of the low grade energy. meanwhile,the thermal performance of the radiation terminal has a great influence on air conditioning system. This paper is in the study of simulation and experiment about the radiation air condition system which is based on an air source heat pump. Setting up the calculation model by ANSYS software,make an research and analysis about factors which affect radiation system’s thermal performance and works by different radiation terminal. At the same time, make an experiment about one model radiation air conditioning system under summer and winter typical working condition. Compares the experimental results and simulation results,verify the reliability of the mathematical model. Simulate the influence about the performance of radiation terminal by the filling materials、 pipe diameter、 pipe spacing parameters. Filling thickness affect is most great,the coefficient of thermal conductivity of the filling material is more great,the greater the thermal performance.but as the coefficient of thermal conductivity continues to increase, the trend to improve the performance of the system is fade out. So the filling materials can only choose in accordance with the engineering practice and as high thermal conductivity filler material as possible. In addition,pipe diameter’s influence about radiation system is half about the thickness of filling,also between the pipe spacing and thickness of filling. Calculate and analysis radiation terminal up-surface temperature with different structure forms,further to measure the performance of radiation terminal based on to this. Next to calculate mean radiant temperature indoor、 black bulb temperature 、 effective temperature、 functional temperature, non-uniformity coefficient about temperature indoor. Get the comfort index PMV and PPD of measured air conditioning room. In addition to this,tested the PM2.5 concentration distribution indoor under an radiation air conditioning with doas system,analyzed PM2.5 distribution characteristics under the action of indoor and outdoor...