ANALYSIS AND OPTIMIZATION DESIGN METHOD OF EXHAUST HOOD
CAPTURE EFFICIENCY ABOVE BUOYANT JET

Wang Yi; Liu Qiuhan; Huang Yanqiu; Yang Yang; Ma Junchi

doi:10.13205/j.hjgc.201501020

Volume 33 Issue 1

Mar. 2015

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2015 > 33(1): 85-89

Wang Yi, Liu Qiuhan, Huang Yanqiu, Yang Yang, Ma Junchi. ANALYSIS AND OPTIMIZATION DESIGN METHOD OF EXHAUST HOODCAPTURE EFFICIENCY ABOVE BUOYANT JET[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(1): 85-89. doi: 10.13205/j.hjgc.201501020

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Wang Yi, Liu Qiuhan, Huang Yanqiu, Yang Yang, Ma Junchi. ANALYSIS AND OPTIMIZATION DESIGN METHOD OF EXHAUST HOOD CAPTURE EFFICIENCY ABOVE BUOYANT JET[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(1): 85-89. doi: 10.13205/j.hjgc.201501020

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ANALYSIS AND OPTIMIZATION DESIGN METHOD OF EXHAUST HOOD CAPTURE EFFICIENCY ABOVE BUOYANT JET

doi: 10.13205/j.hjgc.201501020

Publish Date: 2015-01-22

Abstract

Abstract

Local exhaust hood is the most effective way to control the buoyant jet with contaminants in industrial buildings． The control effect of the exhaust hood decreases due to the area of hood smaller than the pollutant source because of the internal structure of the industrial plants or their process conditions． regarding this issue，numerical analysis methodology was adopted to study the changing law of buoyant jet flow field under the condition of space confined． A more energy saving method was presented compared to increasing the exhaust air flow rate． Subsequently，the influence law between baffle and capture efficiency was illustrated． Eventually，the result showed that the rational baffle set could highly increase the exhaust hood capture efficiency． Furthermore，the capture efficiency improved along with the increase of dimensionless length of the baffle． The baffle effect was able to reduce the lessening influence upon the capture efficiency caused by increasing the height of hood．
- buoyant jet,
- exhaust hood,
- capture efficiency

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沈阳化工大学材料科学与工程学院沈阳 110142

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