Research On Suitable Ventilation Mode In Rural Housing Of Northern Region In Heating Season

With the improvement of building energy saving，the airtight of buildingisgetting better and better. Beacause of no central heating system, a great deal ofnon-clean energy is burned in rural housing in northern Chnina. It leads to theindoor air pollution, which greatly affects the residents’ health.Ventilation mode in the heatin reason is studied in this paper for the purpose ofimproving the indoor air quality in rural housing of northern China. Bsded on thelow temperature in the outside and considering the affordability of the residents, amulti-index evaluation system is established, which consists of indoor air quality,thermal comfort, economy, noise. Based on the evaluation index system, each indexvalues is calculated using AHP under19different scenarios.Considering the evaluation index in of the evaluation index system, potentioalventilation in modes are summarized in rural housing of northern China in heatingseason. Aiming at the phenomenon that a sharp rise in the fire time in the kitchen,different ventilation modes for the kitchen and bedroom are simulated. Thses canobtain the corresponding concentration of indoor pollutions, temperature field, flowfield and so on.Kitchen exhaust simulation results show that the use of the kitchen fan transom+lead the way with the kitchen relies on natural air infiltration+chimney smokeexhaust from two compared to when the end of the straw combustion, CO, PM2.5concentrations in the kitchen were1.89mg/m3,0.05mg/m3and3.84mg/m3,0.78mg/m3, CO concentration in both standard limits are met, but only the use of PM2.5transom+induced draft fan only way to meet the requirements.Ventilation simulation for the bedroom and found that for the simulated threekinds of ventilation, sewage works best is to open two sash for ventilation. At theend of the kitchen straw combustion process, it corresponds to an indoor CO andPM2.5concentrations were2.72mg/m3,0.13mg/m3. PM2.5concentration whichdoes not meet the standard limit requirements described in several simulatedbedroom ventilation can only play a role in reducing the concentration of indoorpollutants.Using the simulated data, the combination of the calculated values of theweight of19different programs simulated three kinds of ways and three kinds ofkitchen exhaust comprehensive evaluation value is calculated of the ventilationbedroom. The results showed that the three kinds of smoke on the way to the kitchen,if deemed indoor air quality is more important, then the induced draft fan exhaustfrom the transom+better if think the economy is more important, then the use ofnatural air infiltration+chimney smoke better. The three kinds of bedroom ventilation, indoor air quality if deemed more important, then open two windowsand better ventilation, if deemed indoor thermal comfort is more important, then theuse of better penetration ventilation.