NUMERICAL-METHOD FOR A FULL ASSESSMENT OF INDOOR THERMAL COMFORT

被引:33
作者
GAN, GH
机构
[1] Department of Construction Management and Engineering, University of Reading, Reading, RG6 2AW, Whiteknights
来源
INDOOR AIR-INTERNATIONAL JOURNAL OF INDOOR AIR QUALITY AND CLIMATE | 1994年 / 4卷 / 03期
关键词
THERMAL COMFORT; DRAFT; COMPUTATIONAL FLUID DYNAMICS (CFD); AIR VELOCITY; MEAN RADIANT TEMPERATURE; VAPOR PRESSURE;
D O I
10.1111/j.1600-0668.1994.t01-1-00004.x
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Heat, mass and momentum transfer takes place simultaneously in ventilated rooms. For accurate predictions of the indoor environment, all the environmental parameters that influence these transport phenomena should be taken into consideration. This paper introduces a method for a full assessment of indoor thermal comfort using computational fluid dynamics in conjunction with comfort models. A computer program has been developed which can be used for predicting thermal comfort indices such as thermal sensation and draught risk. The sensitivity of predicted comfort indices to environmental parameters is analysed for a mechanically ventilated office. It was found that when the mean radiant temperature was considered uniform in the office, the error in the predicted percentage of dissatisfied (PPD) could be as high as 7.5%, The prediction became worse when the mean radiant temperature was taken to be the same as air temperature point by point in the space. Moreover, disregarding the variation of vapour pressure in the space resulted in an error in PPD of abour 4% near the source of moisture generation. The importance of evaluating both thermal sensation and draught risk is also examined. It is concluded that in spaces with little air movement only the thermal sensation is needed for evaluation of indoor thermal comfort whereas in spaces with air movement induced by mechanical vantilation or air-conditioning systems both thermal sensation and draught risk should be evaluated.
引用
收藏
页码:154 / 168
页数:15
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