Characteristics Of Radiant Floor Cooling System

Low-temperature radiant floor heating technology in recent years due to their thermal comfort and energy saving advantages are widely used in various types of new buildings and renovation projects. Coupled with hot summer and cold in winter in some southern cities began to make winter heating requirements of buildings. A system can be used both for summer cooling and winter heating, and its initial investment and running costs of both will be greatly reduced. Therefore, radiant floor cooling technology research and application has been rapid development. But some outdoor dry bulb temperature and relative humidity of the relatively large city, in the application of radiant floor cooling technology limited by the dew point temperature, cooling capacity difficult to achieve, you need to add another set of displacement ventilation systems, which will undoubtedly turn not a small increase in investment. The main topic for the northwest, north, northeast and some other summer outdoor dry bulb temperature and relative humidity of the lower city of its residential construction in the application of displacement ventilation systems without a single floor radiant cooling system, the indoor thermal environment, thermal comfort, condensation and energy saving potential.The main subject of theoretical study, numerical simulation, experimental validation and other aspects of the same time for the winter heating and summer cooling system, radiant floor heat transfer mechanism, cooling capacity, condensation in-depth research. Taiyuan is the cold, winter heating period is longer, the outdoor temperature is low; summer cooling period is shorter. outdoor air temperature and relative humidity is relatively low. The climatic conditions for the radiant floor system of hot and cold together with a natural advantage. And for ordinary residential buildings in summer air conditioning requirements are relatively low. the occasional one or two days of extreme hot and humid weather, insufficient cooling capacity can be used to assist fans and natural ventilation cooling. Therefore, subject to the ordinary residential buildings in Taiyuan area, for example, studies of residential buildings in a single floor cooling technology and feasibility of its application conditions. Then use the same methods on all the major cities in ordinary residential buildings in summer radiant floor cooling system using a single scope of application of the regional division. The results can be for future single-floor radiant cooling system design to provide a basis.Also built the floor radiant cooling test bed. Different conditions, radiant floor cooling the indoor temperature distribution was investigated experimentally. Analysis of water temperature, flow rate, coil spacing and other factors on floor cooling the indoor temperature distribution. The conclusion is the optimal water temperature, flow rate, coil spacing.According to the basic principles of heat transfer and the ASHRAE calculation on the floor radiant cooling floor cooling was constructed by two-dimensional simplified model of the software using FLUNET temperature distribution in the floor and the room temperature distribution was simulated. Experimental results show that the model is correct.