| Because bad ventilation and a large amount of synthetic material used in the construction material, the concentration of air contaminations indoors are often higher than the outdoors. In order to keep indoor air quality comfortably people require more fresh air ; but the less fresh air amount is, the more energy-conservation is. How to confirm that the suitable new trend amount is the difficult problem that the technical staff of air conditioner faces all the time.The uncertain method is a way to be used for solving the problem that the information is not complete uncertain. The fresh air in the room is a complicated problem, which is a lot of uncertain conditions. So this paper try to study fresh air and indoor air quality problem with uncertain method.This paper firstly utilizes grey systematic theory and already existing definite physical model to develop the non-intrinsic grey model of the effect of outdoor air on indoor air and analyse every grey parameter in the non-intrinsic grey model. On the basis of above mentioned, the change of carbon dioxide concentration indoor with the change of time is evaluated.Dealing with all the information of subjective responses to fresh air indoor by fuzzy theory. The annoying probability is found under the different amount of fresh air, the annoying threshold of fresh air under the environment of no smoking indoor is gained though weighted average. At the same time , through statistical analysis, visitor unsatisfied rate higher than indoor personnel obviously someone when someone smoke indoor ; visitor unsatisfied rate lower than indoor personnel slightly when not any one smoke indoor . Women unsatisfied rate higher than man slightly; Non-smoker unsatisfied rate higher than smoker.In order to evaluate indoor air quality of office, this paper analyze three element such as evaluation indexes, evaluation standards and weight coefficient .It revealed higher sensitivity in the comprehensive evaluation on indoor air quality in office buildings. |
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