Study On The Diffusion And Control Strategy Of CO In Rural Residential In Severe Cold Region

In the high-speed economic development today，the living standard of people ishigher， but the environment is worse. Environmental pollution problems can beseen everywhere，it has been a serious threat to people life health.The indoorenvironment pollution affect people’s health more. Rural areas in China， thebiomass and coal combustion is the main source of indoor air pollution. COpoisoning has been a common occurrence.There are many people have done much follow-up studies of CO incidentmechanism， but they generally from a specific study of CO poisoningmeteorological condition.What they do to establish CO poisoning meteorologicalforecast has certain application value，but the study of correlation analysis in thefield of building environment is lack. In this research，on the basis of the prophasework,we will do further explore about CO poisoning of winter residence in thenorth cold region mechanism to give solutions.The main research contents aredivided into four parts:1.The levels of CO in the flue gas and the combustion state of pulverized coalwere studied by measuring different combustion condition.2.To build a model according to the typical residential of CO poisoningincidents, then set the boundary conditions combined with the data obtained by themeasured.3.To find the generation，transmission, the process of accumulation about COgas and the mechanism of CO poisoning under the winter specific weatherconditions in cold region.4.This paper aimed at obtaining the influence between diffusion degrees of COand the architecture body, thus solutions of proper architecture body which avoidsindoor CO poisoning and improved ventilation method were proposed.In this subject，we take two methods—field measurement and numerical tostudy the mechanism and countermeasures to prevent the occurrence of the event.Through the measured data and simulation results,we coule find that the distributionof indoor CO is not uniform. CO concentration in the upper space is higher than the area near the ground. Due to the effect of reflow, the CO concentration near thewalls is higher than the middle area. In the area near the window of windward side,CO concentration is lower. According to the above results, people can choose regionof low concentration to do something to prevent CO poisoning.CO gas from the burning is mainly through the top openings of the stove bodyto the interior. If we could increase the leakproofness of the openings，we couldfing the concentration of indoor CO has been lessenclearly. Wind penetration of theOpenings on the retaining structure has also an obvious effect on indoor COconcentration level and its distribution. Under certain conditions,increasing openinginfiltration airflow can prevent the generation of CO poisoning. Strengthening heatpreservation of stove and chimney can promote the ventilation of the chimney,thenreduce indoor CO concentration.In addition， the simulation also found that the outside weather conditionshave a significant impact on the CO poisoning events. Low outdoor air pressure，low wind speed， high temperature， temperature inversion and so on are marks ofCO poisoning.Under these conditions，people should be vigilant to prevent thehappening of the CO poisoning.