CO2 emission rates from sedentary subjects under controlled laboratory conditions
CO2 emission rates from sedentary subjects under controlled laboratory conditions
复制标题
DOI：
10.1016/j.buildenv.2021.108735
复制
发表时间：
2022-01-07
影响因子：
7.4
通讯作者：
Wargocki, Pawel
中科院分区：
文献类型：
--
作者：
Sakamoto, Mitsuharu;Li, Mengze;Wargocki, Pawel
我们测定了在受控室内暴露条件下，久坐不动的受试者在平板电脑或智能手机上进行轻度工作时的二氧化碳（CO2）排放率。5组，每组4人（4组2男2女，1组3男1女），在不同环境条件下在22.5 m(3)的不锈钢室内停留3小时，下午在吃完清淡的午餐后停留2.5小时。三组由年轻人（大学生），一组老年人和一组青少年组成。室内采用室外空气，通风时间为3.2 h(-1)（每人5 L/s）。使用单区质量平衡方程计算人均二氧化碳排放量，并在达到稳态后测量二氧化碳浓度。人均排放量在上午为14.1 ~ 16.8 L/h，下午为15.9 ~ 17.8 L/h；下午较高的水平可能是由饮食诱导的产热（DIT）代谢增加引起的。当参与者感到温暖时，排放率随温度升高而升高，但不随相对湿度或臭氧浓度的增加而变化。它们与使用ISO 8996和ASTM DS 6245的估计值在一定程度上有所不同，但与公布的测量二氧化碳排放率相似。目前的结果需要更多的人来证实，并需要用量热法测量二氧化碳的排放率。
We determined carbon dioxide (CO2) emission rates from sedentary subjects performing light work on tablets or smartphones in controlled chamber exposures. Five groups, each consisting of four people (four groups with two females and two males and one with three males and one female), stayed in a 22.5 m(3) stainless steel chamber under different environmental conditions for 3 h in the morning and then 2,5 h in the afternoon after having a light lunch. Three groups consisted of young adults (college students), one of seniors, and one of teenagers. The chamber was ventilated with outdoor air at 3.2 h(-1) (per person rate was 5 L/s). The CO2 emission rates per person were calculated using a single-zone mass-balance equation and the measured CO2 concentration once steady state had been reached. Per person emission rates varied between 14.1 and 16.8 L/h in the morning and 15.9-17.8 L/h in the afternoon; higher levels in the afternoon were probably caused by the increased metabolism from diet-induced thermogenesis (DIT). Emission rates were higher with increased temperature when the participants felt warm, but did not change with increased relative humidity or ozone concentration. They differed to some extent from those estimated using ISO 8996 and ASTM DS 6245, but were similar to published measured CO2 emission rates. The present results require confirmation with more people and measurements of CO2 emission rates using the calorimetric method.