Vocs Concentration Of Indoor Air Environment Cfd Simulation Analysis

In recent years, with the development of computer industry and Computational Fluid Dynamics, the CFD method was widely used in HVAC field, it becomes possible to simulate and predict air distribution, thermal comfort of design system based on CFD technology in air conditioning system in room. At present, however, using CFD simulation method to model and simulate the VOCs concentration field of indoor environment is not comprehensively in China. For this purpose, with the aid of Airpak2.1, the n-butanol concentration field of a lab is simulated, in order to test the feasible of the CFD method, The simulation result was analyzed and checked by the test data, and the results are validated by actual test. It will be valuable for the control of the decision-making indoor pollutants.Through detailed expatiation on CFD by mathematic method, the results indicate that it is feasible to simulate the VOCs concentration field of indoor environment. Besides, based on this method, the Toluene concentration field of a spray paint room are simulated by CFD method in the next few chapters of this paper. The specific content of this paper is as follows:1. The n-butanol concentration field a lab is simulated and a simulation under this condition is carried out based on CFD technology. After that, the simulation results are compared with test result, which demonstrates the feasibility of CFD technology, and the simulated value is concurrent to the test data of the contamination concentration of the indoor room in changing trend. It is feasible and accurate to simulate the VOCs concentration of indoor air environment by CFD method.2. Using CFD simulation method to model and simulate the Toluene concentration field of a spray paint room under certain exhaust flow flux and different sources of pollutions. The results show that Point B is the best place for sources of pollutions3. According to the simulation results, Using CFD method to simulate the Toluene concentration field of a spray paint room under different supply and exhaust flex in point B. The simulation results shows that it is the optimum combination of exhaust flow flux 2800m~3/h and supply flow flux 1300m~3/h.