The Research On Capillary Wall Radiation Air Conditioning Systerm Based On Air Energy

At present, the terminal equipments of radiation air conditioning are made up of cool roof and capillary radiation board.The capillary radiation board has been widely used in engineering practice.With the research of heating method, the capillary heat pump without water type air conditioning has appeared on the market as a new product.the heat transfer terminal. The secondary refrigerants are made up of chilled water. Refrigerant capillary network air conditioning system was based on chilled water. This kind of air conditioning had been developed. In this article, numerical simulation and the result analysis had been made on the capillary heat pump without water type air conditioning which was using R22 as refrigerant.Capillary condenser refrigerant is two-phase flow, and the material of capillary is copper. It is unable to do visualization experiments.Therefore,using the method of taking experiments on tube refrigerant status becomes very difficult.The numerical simulation of two-phase condensation on condensing was of great importance and influence on analysis and predicting the heat transfer performance of capillary condenser.The capillary condenser physical model was established on CFD method by ICEM processing software.The user define function was compiled and interpreted on condensation heat transfer of R22. The heat transfer performance of the capillary tube condenser was calculated on two-phase distribution, pressure distribution, condensation effect by the mixture model of Fluent. And the condensation quantity under different gas flow velocity distribution along the length were obtained.At the same time, the cause of the parameters was analyzed.The best parameters of spacing, velocity and length were get on the the installation of the capillary tube condenser.A experimental study was made of three different heat capacity of heat source machines on different external environment dry bulb temperature. The average COP of heat source machines on-10℃ was 2.8. The average COP of heat source machines on 0℃ was 3.7. The average COP of heat source machines on 7℃ was 4.2.In this paper, the numerical simulation was made on the capillary tube condenser whose secondary refrigerant was in use of R22. The experiment results analysis was made on the heat source machine. It has certain guiding significance for the calculation of heat transfer in the capillary air conditioning on R22 and the laying of indoor capillary tube condenser.