Flow Characteristic Calculation And Simulation Analysis On Equal Section Exhaust Shaft With Multi-power Source Fans In High-rise Building

With the development of the city, urban land more and more nervous, high-risebuilding is now an important form of urban architecture. As the Chinese people ’seating habits, a major source of indoor pollution in high-rise residential building is thekitchen. In high-rise public buildings, the bathroom is relatively concentrated areas ofpollution, and exhaust system is an important way to solve the space pollution. Thispaper focuses smoke (gas) systems research on these two places. The purpose is tosolve the ventilation system is running away from the presence of a large amount ofupper and lower exhaust system exists and odor problems.For distributed exhaust system, select33-storey residential building kitchen hood,theoretical calculations using MATLAB programming, and with the actual measureddata were compared and analyzed using the same model when hood exhaust ductoperation rate and centralized cross-sectional area size of. Theoretical calculation of theamount allocated layers exhaust hood mix the actual conditions and centralized exhaustduct static pressure distribution, while the hood with the same models were compared.Analyzed under the kitchen hood exhaust system in the form of permutations andcombinations to optimize operating conditions, the exhaust volume of distribution ofthe layers and the corresponding concentration of exhaust duct static pressuredistribution.For centralized exhaust system, select18-storey office building toilet, theoreticalcalculations using roof fan ventilation system, and with the results of CFD simulationswere compared. Calculated by different theoretical performance roof fans, exhaust ductcross-sectional area concentrated layers bathroom exhaust manifold exhaust volumedistribution and its resistance under static pressure distribution. Analyzes theshortcomings of its exhaust volume, uneven reasons put forward exhaust system performance evaluation unbalance concepts, and on this basis put forwardcorresponding measures.For hybrid ventilation system, select20-storey hotel room bathroom, will becalculated on the basis of the theoretical value of the CFD calculation fan ventilationsystem and exhaust system exhaust fan and roof fans with a series of conditions on thehydraulic theory the simulation results were compared and analyzed. Theoreticalcalculations of the different performance exhaust fan, centralized exhaust ductcross-sectional area, the operation rate of cases under each room bathroom exhaustvolume allocation and static pressure distribution. And on the exhaust fan and exhaustfan roof fan series with two exhaust systems were compared and analyzed under asmaller cross-sectional area concentrated exhaust channel conditions, the amount of thelayers to meet the requirements of the ventilation exhaust duct design solution.