Comfort standards(ISO 7730,ASHRAE 55)specify the exact physical criteria for producing acceptable thermal environments,such as temperature,air movement,and humidity limits.These,however,are often difficult to comply w...Comfort standards(ISO 7730,ASHRAE 55)specify the exact physical criteria for producing acceptable thermal environments,such as temperature,air movement,and humidity limits.These,however,are often difficult to comply with,particularly in hot humid and cold wet seasons in Nanjing,China.Changing expectations of comfort is important in evaluating comfort,since naturally conditioned buildings in Nanjing are not typically airconditioned.For this objective,a field study was conducted during the summer of 2000 and the winter of 2001.A total of 600 participants each answered a subjective questionnaire.Analyzing these field data shows that in natural conditions,the influence of gender and age on people’s thermal sensations is insignificant compared with six main variables.In addition,people’s thermal discomfort rapidly increases along with growth in relative humidity.Further,the variation of people’s hot or cold sensations is in proportion to that of air movement,and the effect in winter is greater than that in summer.The range of acceptable temperatures in hot humid and cold wet Nanjing is between 14.14℃and 29.42℃.展开更多
Wet bulb globe temperature(WBGT)is a comprehensive index obtained mainly from three parameters:black globe temperature(Tg),wet bulb temperature(Tw),and dry bulb temperature(Ta).While in field observation and numerical...Wet bulb globe temperature(WBGT)is a comprehensive index obtained mainly from three parameters:black globe temperature(Tg),wet bulb temperature(Tw),and dry bulb temperature(Ta).While in field observation and numerical simulation,black globe temperature and wet bulb temperature were not easy to obtain,so WBGT was difficult to measure and calculate directly.In order to solve this problem,air dry bulb temperature,wet bulb temperature,globe temperature,relative humidity,mean air velocity,solar radiation and wet bulb globe temperature were collected during the summer(July)in Guangzhou.Correlation analysis and regression analysis were used to get a simplified method to calculate WBGT.The results showed that dry bulb temperature,relative humidity,solar radiation and WBGT were interrelated to some extent.These three parameters could be used in the simplified method to predict WBGT,and the linear correlation and precision of this model were high.In addition,we used the measured data to verify the simplified method,and the results showed that the error of the calculated value and the measured value was all below 5%,which means the simplified calculating method is feasible and can be used in field observation and simulation research of urban thermal environment.展开更多
The thermal environment and thermal comfort of a building are greatly affected by the desig n of the build ing interface form. Most con temporary architectural designs con sider only the relations between architectura...The thermal environment and thermal comfort of a building are greatly affected by the desig n of the build ing interface form. Most con temporary architectural designs con sider only the relations between architectural form and architectural beauty. Few studies on the correlati on of architectural form and thermal comfort address the in flue nee of architectural form on thermal comfort and thermal environment. These studies are particularly important for gymnasium architectures located in hot and humid areas, which have high requirements for thermal comfort. This paper presents an experimental investigati on and an an alysis of the effect of the building in terface form of gymnasiums on thermal comfort in hot and humid subtropical regions during summer. Results showed that the influence of the top interface forms on thermal comfort is mainly dominated by the mea n radiant temperature, which could be con trolled to improve thermal comfort. The in fluence of side interface forms on thermal comfort is mainly domi nated by air velocity, and thermal comfort could be improved by promoting natural ventilation on the side interface form design to reduce indoor heat. This research enhanced our understanding of the relation between the in terface form and the thermal comfort of gymnasiums. In addition, this paper provides a theoretical reference for the sustainable design of gymnasiums in hot and humid climates.展开更多
基金supported by the Natural Science Foundation of Jiangsu Province(BK2010061)the Advance Research Projects of Southeast University for National Natural Science Foundation of China(XJ0701262)National Key Technologies R&D Program of China(2008BAJ12B04,2008BAJ12B05 and 2006BAJ03A04).
文摘Comfort standards(ISO 7730,ASHRAE 55)specify the exact physical criteria for producing acceptable thermal environments,such as temperature,air movement,and humidity limits.These,however,are often difficult to comply with,particularly in hot humid and cold wet seasons in Nanjing,China.Changing expectations of comfort is important in evaluating comfort,since naturally conditioned buildings in Nanjing are not typically airconditioned.For this objective,a field study was conducted during the summer of 2000 and the winter of 2001.A total of 600 participants each answered a subjective questionnaire.Analyzing these field data shows that in natural conditions,the influence of gender and age on people’s thermal sensations is insignificant compared with six main variables.In addition,people’s thermal discomfort rapidly increases along with growth in relative humidity.Further,the variation of people’s hot or cold sensations is in proportion to that of air movement,and the effect in winter is greater than that in summer.The range of acceptable temperatures in hot humid and cold wet Nanjing is between 14.14℃and 29.42℃.
基金Supported by the National Natural Science Foundation of China(50538040,50720165805,50808083)the 111 project(111-2-13)State Key Laboratory of Subtropical Building(2008ZB14)
文摘Wet bulb globe temperature(WBGT)is a comprehensive index obtained mainly from three parameters:black globe temperature(Tg),wet bulb temperature(Tw),and dry bulb temperature(Ta).While in field observation and numerical simulation,black globe temperature and wet bulb temperature were not easy to obtain,so WBGT was difficult to measure and calculate directly.In order to solve this problem,air dry bulb temperature,wet bulb temperature,globe temperature,relative humidity,mean air velocity,solar radiation and wet bulb globe temperature were collected during the summer(July)in Guangzhou.Correlation analysis and regression analysis were used to get a simplified method to calculate WBGT.The results showed that dry bulb temperature,relative humidity,solar radiation and WBGT were interrelated to some extent.These three parameters could be used in the simplified method to predict WBGT,and the linear correlation and precision of this model were high.In addition,we used the measured data to verify the simplified method,and the results showed that the error of the calculated value and the measured value was all below 5%,which means the simplified calculating method is feasible and can be used in field observation and simulation research of urban thermal environment.
文摘The thermal environment and thermal comfort of a building are greatly affected by the desig n of the build ing interface form. Most con temporary architectural designs con sider only the relations between architectural form and architectural beauty. Few studies on the correlati on of architectural form and thermal comfort address the in flue nee of architectural form on thermal comfort and thermal environment. These studies are particularly important for gymnasium architectures located in hot and humid areas, which have high requirements for thermal comfort. This paper presents an experimental investigati on and an an alysis of the effect of the building in terface form of gymnasiums on thermal comfort in hot and humid subtropical regions during summer. Results showed that the influence of the top interface forms on thermal comfort is mainly dominated by the mea n radiant temperature, which could be con trolled to improve thermal comfort. The in fluence of side interface forms on thermal comfort is mainly domi nated by air velocity, and thermal comfort could be improved by promoting natural ventilation on the side interface form design to reduce indoor heat. This research enhanced our understanding of the relation between the in terface form and the thermal comfort of gymnasiums. In addition, this paper provides a theoretical reference for the sustainable design of gymnasiums in hot and humid climates.
