Numerical Simulation on Variable Pressure Exhaust System of Residential Kitchens
Numerical Simulation on Variable Pressure Exhaust System of Residential Kitchens
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发表时间：
2011
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通讯作者：
Shao Zhi-min
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作者：
Shao Zhi-min
In this paper,according to the smoke problem in the centralized exhaust system of residential kitchen in high-rise buildings,the CFD technology was applied to simulate the velocity and pressure fields of three type exhaust passages,and the simulation results were compared,analyzed and theoretically verified.The results shown that the service effect of the system that only equipped with the guidance device was good,the averaged exhaust volume was 371.7 m3 /h,and the difference between the maximum and the minimum exhaust volumes of the user was 176.3 m3 /h.If the exhaust volume of the range hood with the oil and smoke collection efficiency of 90% was taken as the design value,for the aforesaid system with good exhaust effect,when the simultaneous service coefficient was 0.66,60% of the users would not reach the design exhaust volume,the static pressure value of the power-off branch was 116.2 ～ 197.3 Pa,and the possibility of smoke stream back flow was large.
