Study To Determine The Reasonable Exhaust Volume And Flue In The Form Of Residential Kitchens Impact On The Flow Of Exhaust

In recent years, China’s urbanization rate gradually accelerated, along with thetown’s population growing congregation. In residential buildings, high-rise residentialbuildings are becoming more common, kitchen as the "heart" of residential construction,its sanitation and hygiene conditions has gradually been seriously rise. In this paper,experimental, CFD simulations and theoretical calculation were used to studies todetermine the reasonable amount of residential kitchen and effects of flue gas flowcaused by exhaust Passage Patterns. The main contents are as follows:First, for a typical high-rise residential kitchen, under the cooking conditions (hoodclosed), monitoring the operator breathing zone (from the ground1.4m) of eachpollutant (CO2, CO and TVOC) concentrations and temperature variation with cookingtime. Reference test monitoring results and literature data, using unsteady CFDsimulations, when change to a different operating conditions hoods (exhaust volume ofdifferent sizes), each operator breathing zone contaminant concentration variation withcooking time. Studies have shown that the conditions to be satisfied in the cookingkitchen each pollutant concentration values were reduced indoor air quality standardsfor allowable concentration, choosing a reasonable amount of residential kitchenexhaust, the main indicators to be considered should be TVOC concentrations, andengineering design for the recommended amount of smoke the size of300m3/h.Second, according to the national standard residential kitchen flue atlas, studyingseveral forms of high-rise residential kitchen exhaust channel layer3partial flue system.The CFD simulations were used to upper layer impact on the lower exhaust in the household; lower household exhaust affect the upper household exhaust; the impact ofthe main flue exhaust on households and the effects of exhaust and the main householdsof the upper and lower exhaust flue households. Comparison of simulation resultsobtained, different flue forms, different diversion member of a great diversion for theflue gas flow.Third, the peer-section flue type, analysis of the factors affecting the size of theflue local resistance coefficient of drag coefficient and along the confluence, andanalyzes the application of heat and pressure in the residential kitchen flue; the n layersystem for flue lists of n energy equation, the MATLAB software was used to computernumerical calculations.Finally, the use of numerical simulation to explore several different forms of fluesystems are in turn was100%and66.7%(uniformly open) case, consider exhaust andoutdoor air temperature difference was0℃,25℃and50℃time. comparativeevaluation average Qaveamount of each exhaust system, imbalance qand so on.comprehensive evaluation of various indicators..