Study Of Heat Distribution Coefficient Of Rooms With Indoor Heat Source

The heat distribution coefficient expressed with the dimensionless temperature, or which reciprocal the ventilation (temperature) efficiency is the main reaction of the synthesize effect of heat environment in building. It is an importance basis to enact beforehand and compare in the design process, also is an important index to test and evaluate during the management. By researching that, the influence factor of natural ventilation system can be understand, then the better natural ventilated system can be designed and the purpose of energy economized and indoors air quality increased can be attained.Using a physical model abstracted from classroom as the study object, established the mathematical model and adopted CFD software to solve the model's velocity and temperature distribution under the situation of giving the heat flux of the constructions' inside surface, the positions of heat source indoor and entrance and export. It analyzed influence laws of natural ventilation's heat distribution coefficient concerning Gr number, quantity of heat source indoor and outdoor, heat source area, room height, entrance and export area etc., and analyzed the turbulence model shoud be taken to this type of study object.Through the research indicated that, to this type of study object using the standard k-εmodel to solve was appropriate. Heat distribution coefficient increased with Gr,r/F,2/H,ξ, after increase reduced with A/F, the wall had heat transfer influenced the heat distribution coefficient indistinctively. Moreover the author through attempted repeatedly obtained heat distribution coefficient dimensionless relationship under two conditions of the wall had heat transfer and no.