Thermal comfort is an important factor in hostel buildings when the aim is to maximize the productivity of the students.Due to the extreme weather conditions,achieving thermal comfort in a hostel building in a hot and...Thermal comfort is an important factor in hostel buildings when the aim is to maximize the productivity of the students.Due to the extreme weather conditions,achieving thermal comfort in a hostel building in a hot and humid climate is even more difficult.Studies conducted in naturally ventilated hostel buildings in warm-humid climates involved the influence of outdoor air temperature only up to 34.4℃ and have been conducted in a specific season.In contrast,the Tiruchirappalli climate is characterized by a higher range of environmental variables.Therefore,to understand the thermal comfort conditions and usage of the environmental controls in naturally ventilated hostel buildings at the higher range of the environmental variables,a thermal comfort field study spread over one year was carried out at the National Institute of Technology,Tiruchirappalli,India,in twenty-seven hostel buildings.This study relies on field observation and thermal comfort responses from 2028 questionnaires collected from the students between September 2019 to August 2020.The analysis revealed a neutral temperature of 29.5℃ and a comfort range from 26.1℃ to 32.8℃,indicating a wide range of ther-mal adaptation than suggested by the National Building Code of India and ASHRAE standard 55.The preferred temperature was 27.8℃,indicating that students preferred a cooler environment.Acceptability with sweating conditions extended the upper limit of thermal acceptability from 31.8℃ to 32.4℃.The use of a mosquito net can increase the probability of opening a window.Results indicated that overall behavioral adjustment could extend the comfort limits.The study results would be helpful to develop guidelines and designs for naturally ventilated hostel buildings in warm and humid climates that will contribute to reducing energy demand.展开更多
为了解通风空调系统循环空气的消毒方法的效果,采用现场试验的方法对高效过滤、激光照射、静电吸附、紫外线照射和臭氧熏蒸等空调空气消毒方法进行了观察。结果,高效过滤和激光照射方法一次通过时自然菌消亡率大于90%;静电吸附经过运行1...为了解通风空调系统循环空气的消毒方法的效果,采用现场试验的方法对高效过滤、激光照射、静电吸附、紫外线照射和臭氧熏蒸等空调空气消毒方法进行了观察。结果,高效过滤和激光照射方法一次通过时自然菌消亡率大于90%;静电吸附经过运行15 m in,除菌率为62%;紫外线照射方法在消毒系统运行90 m in后对自然菌消除率大于90%。臭氧空调消毒装置在臭氧量保持3.48 mg/m3,运行90 m in,对自然菌消除率可达到90%以上。结论,空调系统消毒装置以激光和高效过滤除菌效果最好,紫外线辐射、静电及臭氧均需要运行一定时间之后才显除菌效果。展开更多
文摘Thermal comfort is an important factor in hostel buildings when the aim is to maximize the productivity of the students.Due to the extreme weather conditions,achieving thermal comfort in a hostel building in a hot and humid climate is even more difficult.Studies conducted in naturally ventilated hostel buildings in warm-humid climates involved the influence of outdoor air temperature only up to 34.4℃ and have been conducted in a specific season.In contrast,the Tiruchirappalli climate is characterized by a higher range of environmental variables.Therefore,to understand the thermal comfort conditions and usage of the environmental controls in naturally ventilated hostel buildings at the higher range of the environmental variables,a thermal comfort field study spread over one year was carried out at the National Institute of Technology,Tiruchirappalli,India,in twenty-seven hostel buildings.This study relies on field observation and thermal comfort responses from 2028 questionnaires collected from the students between September 2019 to August 2020.The analysis revealed a neutral temperature of 29.5℃ and a comfort range from 26.1℃ to 32.8℃,indicating a wide range of ther-mal adaptation than suggested by the National Building Code of India and ASHRAE standard 55.The preferred temperature was 27.8℃,indicating that students preferred a cooler environment.Acceptability with sweating conditions extended the upper limit of thermal acceptability from 31.8℃ to 32.4℃.The use of a mosquito net can increase the probability of opening a window.Results indicated that overall behavioral adjustment could extend the comfort limits.The study results would be helpful to develop guidelines and designs for naturally ventilated hostel buildings in warm and humid climates that will contribute to reducing energy demand.
文摘为了解通风空调系统循环空气的消毒方法的效果,采用现场试验的方法对高效过滤、激光照射、静电吸附、紫外线照射和臭氧熏蒸等空调空气消毒方法进行了观察。结果,高效过滤和激光照射方法一次通过时自然菌消亡率大于90%;静电吸附经过运行15 m in,除菌率为62%;紫外线照射方法在消毒系统运行90 m in后对自然菌消除率大于90%。臭氧空调消毒装置在臭氧量保持3.48 mg/m3,运行90 m in,对自然菌消除率可达到90%以上。结论,空调系统消毒装置以激光和高效过滤除菌效果最好,紫外线辐射、静电及臭氧均需要运行一定时间之后才显除菌效果。
