Numerical Simulation Researches Of Underfloor Air Conditioning System

There are many kinds of systems of central air conditioning system. According to the difference ways of blowing, central air conditioning system can be divide into blowing from the top and from the bottom. Underfloor air conditioning system (UFAC) is the one way of blowing from the bottom. At present, in the designs of the air conditioning system of the theatre and modernized office air conditioner system, we adopt underfloor air conditioning system often, the air of this way can enter the workspace, and the air current handled by the air conditioner directly to make, absorb the heat dissipation of the human body and break up wetly, improve the comfortableness of the indoor environment. Practice has proved, temperature field formed of this kind of air conditioning system and velocity field are all more even, there are very good air conditioner effects.With radiation of the underfloor air conditioning system is one special underfloor air conditioning system, in this kind of system, static pressure box under the floor can not be taken insulation work, so, after some time, the surface temperature of the floor will change, can have a certain impact on hot wet load in the room, thus cause the change of state of underfloor air conditioning system.I calculate model of the underfloor air conditioning system with radiation of the floor, find that among the underfloor air conditioning system with radiation and underfloor air conditioning system without radiation and a ordinary one blow air conditioning system, the system has the characteristics that underfloor air conditioning system with radiation is smaller, more economic, more energy-conserving. To this kind of result of calculation, I use the turbulent mathematics model through the above model, adopt the internationally famous CFD fluid software FULUENT6.0 to calculate, depict the temperature change within models, has got the temperature change contours under two kinds of different operating modes in summer and winter.Calculating through the numerical simulation to this model, we can draw the following conclusion: The floor with radiation of the underfloor air conditioning system and traditional underfloor air conditioning system is compared, the temperature field of its job area is more even, temperature changes smaller, hot comfortableness is better, the design of the whole air conditioner system is smaller in wind amount, energy-conservation.