Evaluation оf Microclimate Parameters by Indicators of Local Heat Comfort in the Room Which Has Failures of Outside Observing Structures

Abstract

The article deals with the task of evaluating the parameters of the microclimate in the room, which has defects of external enclosing structures, using the indicators of thermal comfort PMV (Predicted Mean Vote) , PPD (Predicted Percentage Dissatisfied) and criteria of local thermal comfort. Objectives of the study is the evaluat ion of the influence of the parameters of the microclimate in the room, which has defects of external fencing structures on the indicators of thermal comfort PMV and PPD and criteria for local thermal comfort; determine the limits of a possible reduction of the temperature of the internal air in the room, depending on the percentage of defective zone of the outer wall, the moving activity of man and the thermal resistance of clothing. T he basis of the task of evaluating the parameters of the microclimate in the room is the calculat ion method for predicting and evaluating the microclimate in the room and its impact on the human condition. The method is based on the temperature sensations of the body and its thermal balance. The analytical data obtained in the article show that in a building that has defects in external fencing structures it is possible to obtain uncomfortable conditions of microclimate parameters, which affect the human body and its senses. From the data obtained by forecasting the parameters PMV, PPD it is seen that at internal air temperature of 20 °С and internal velocity in the range 0...0.5 m/s, for the senses of a person, the room belongs to class C, and the appearance and increase of defects only enhances these feelings. By parameter PD, although we get it in class A. But complex evaluation shows that the parameter is reduced to the lowest class. The calculation method can be used to predict and evaluate the microclimate in a room that has defects in external enclosing structures.