The Application Analysis Of Roof Radiant Air Conditioning System In Wuhan

The capillary network radiation system overcomes some of the inherent shortcomings in the traditional air-conditioning system.As an energy-saving,high-efficiency and high-comfort air-conditioning system,the system has been paid more and more attention.In practice,it is generally combined with other fresh air Way into a composite air-conditioning system,in the basic work above all,this article should do the following:Firstly,the three-dimensional flow-solid coupling model of U-shaped gypsum capillary roof is established.The numerical simulation software FLUENT is used to simulate the temperature distribution of the end face.The results show that when the water supply flow rate is 0.2m / s and the plaster thickness is 10 mm,The temperature difference between the water supply temperature and the lower surface of the gypsum is about 1K,that is,the average temperature of the lower end surface is maintained at 27 ? when the water supply temperature is 28 ? in winter.The average temperature of the lower end surface is maintained at 17 ? when the water supply temperature is 16 ?.Secondly,we choose a small office in Wuhan as an example.The physical model of the room is established by using CFD pretreatment software.Simulation experiments are carried out on June,July,August and heating season,and then Intercepting Y = 0.1m,Y = 0.7m,Y = 1.1m,Y = 1.7m,Y = 2.9m,Z =-1.5m section analyse its temperature distribution and indoor temperature distribution under different outdoor weather conditions difference,the simulation results show that Y = 0.1m ~ Y = 1.7m There is a temperature difference of 0.5K ~ 1K in the area of human body movement;there is a temperature difference of 0.2K ~ 0.4K of Y = 2.9m section near the roof;when the outdoor weather in same condition,Turn on and turn off the fluorescent light,the indoor corresponding cross-section of the temperature difference is 0.5K ~ 1.5K.For the cold season,during human activities the temperature maintained at 296 K ~ 301k;in heating season,the human activities area temperature maintained at 290 K ~ 299 K.Thirdly,the room comfort was calculated and analyzed.The PMV/PPD of the rooms in June,July and August and the heating season were calculated to be 0.879/21.315?1.058/28.607?0.945/23.855?0.359/7.684,respectively.Meet the thermal comfort requirements of people in Asia.Finally,based on the physical model of the room,the relative humidity distribution and the distribution of wind speed are simulated.The results show that Y = 0.1m ~ Y = 1.7m The relative humidity of the active area is 51.5% ~ 53.5%,the velocity is 0.005 m / s ~ 0.045 m / s;the relative humidity distribution near the roof is 50% ~ 52.5%,the velocity distribution range is 0.02 m / s ~ 0.16 m / S.In general,the composite air conditioning system combined with radiation air conditioning and other forms of new air has a wide range of prospects,to a certain extent the study for the application of radiation air conditioning provides a reference.