Experimental investigation of standard effective temperature (SET*) adapted for human walking in an indoor and transitional thermal environment

2021 ◽  
pp. 148421
Author(s):  
Zhaosong Fang ◽  
Yuchun Zhang ◽  
Yanping Yang ◽  
Xiaoqing Zhou ◽  
Zhimin Zheng
Keyword(s):  
Experimental Investigation ◽  
Effective Temperature ◽  
Thermal Environment ◽  
Human Walking

Experimental Investigation on Human Walking Loading Parameters and Biodynamic Model

2020 ◽  
Vol 8 (6) ◽  
pp. 883-892
Author(s):  
Wendell D. Varela ◽  
Michèle S. Pfeil ◽  
Natasha de Paula A. da Costa
Keyword(s):  
Experimental Investigation ◽  
Human Walking ◽  
Biodynamic Model

scholarly journals IDENTIFIKASI KENYAMANAN TERMAL BANGUNAN (STUDI KASUS: RUANG KULIAH KAMPUS IPB BARANANGSIANG DAN DARMAGA BOGOR)IDENTIFICATION OF BUILDING THERMAL COMFORT (Case Study: Classrooms in IPB Banangsiang and Darmaga Campuses)

Agromet ◽  
2010 ◽  
Vol 24 (1) ◽  
pp. 14 ◽  
Author(s):  
Rendy Kurnia ◽  
Sobri Effendy ◽  
Laras Tursilowati
Keyword(s):  
Thermal Comfort ◽  
Effective Temperature ◽  
Urban Areas ◽  
Thermal Environment ◽  
Physical Development ◽  
Lecture Hall ◽  
Campus Environment ◽  
Surrounding Areas ◽  
The City

Housing development, well-planned or not well-planned, has changed urban view and its thermal environment. Many researchers have claimed that the worse quality of urban thermal environment is proportional to physical development of the city. Physical development in urban areas has caused various environmental problems, one of them is the change in quality of thermal environment by which the city becomes hotter than the surrounding areas. The purpose of this research was to identify thermal comfort either in classrooms at Darmaga or Baranangsiang campuses of Bogor Agricultural University. PMV (Predicted Mean Vote), using the boundary Effective Temperature (TE), THI (Temperature Humidity Index), and the last method is respondent test. PMVs (Predicted Mean Votes) in the classrooms at Baranangsiang campuses are thermally neutral to slightly warm, while that in classrooms in Darmaga campus are warmer. Effective Temperature which is resulted in the both of lecture halls are comfortable warm conditions. In addition, for respondents test, the thermal impression in IPB campus of Baranangsiang prefers to choose the slightly warm conditions, but for a lecture hall in campus of IPB Darmaga is more dominated by warm and slightly warm conditions. The questionnaire has been appropiated to the range of PMV index. So, the lecture halls that have been studied in both of campus can be concluded as slightly warm condition, because the thermal impressions felt by the respondents are also in the range of neutral to slightly . The value of THI for both of campus environment is in the range of moderate or neutral.Housing development, well-planned or not well-planned, has changed urban view and its thermal environment. Many researchers have claimed that the worse quality of urban thermal environment is proportional to physical development of the city. Physical development in urban areas has caused various environmental problems, one of them is the change in quality of thermal environment by which the city becomes hotter than the surrounding areas. The purpose of this research was to identify thermal comfort either in classrooms at Darmaga or Baranangsiang campuses of Bogor Agricultural University. PMV (Predicted Mean Vote), using the boundary Effective Temperature (TE), THI (Temperature Humidity Index), and the last method is respondent test. PMVs (Predicted Mean Votes) in the classrooms at Baranangsiang campuses are thermally neutral to slightly warm, while that in classrooms in Darmaga campus are warmer. Effective Temperature which is resulted in the both of lecture halls are comfortable warm conditions. In addition, for respondents test, the thermal impression in IPB campus of Baranangsiang prefers to choose the slightly warm conditions, but for a lecture hall in campus of IPB Darmaga is more dominated by warm and slightly warm conditions. The questionnaire has been appropiated to the range of PMV index. So, the lecture halls that have been studied in both of campus can be concluded as slightly warm condition, because the thermal impressions felt by the respondents are also in the range of neutral to slightly . The value of THI for both of campus environment is in the range of moderate or neutral.

scholarly journals Experimental Investigation of Workers Physiology under Tropical Climate in Construction Industries

2020 ◽  
Vol 78 (1) ◽  
pp. 35-47
Author(s):  
Ahmad Rasdan Ismail ◽  
Norfadzilah Jusoh ◽  
Mohd Amin Mahd Asri ◽  
Raemy Md Zein ◽  
Ismail Abdul Rahman
Keyword(s):  
Heart Rate ◽  
Experimental Investigation ◽  
High Risk ◽  
Relative Humidity ◽  
Construction Industry ◽  
Air Temperature ◽  
Thermal Environment ◽  
Construction Workers ◽  
Activity Levels ◽  
Vo2 Max

Construction workers are particularly susceptible to heat-related illnesses, for the weather is very hot and humid. The objective of this study is to investigate the interaction between the temperature and relative humidity to the physiological parameters such as heart rate (HR) and volume oxygen uptake (VO2 max) of the workers in the construction industry. The experiment was conducted in an environmental chamber which simulates the environment of the construction industry with three conditions combining air temperature and relative humidity (34 °C/74 %, 34 °C/92 %, 38 °C/83 %). The HR and the VO2 max of three subjects were monitored, and all the data were continuously recorded every 15 minutes. For each condition, the activity levels such as lifting the heavy sand (10 kg) were conducted for subjects. In the VO2 case, a significant correlation was observed between air temperature (p=0.043) and the relative humidity (p=0.000). Meanwhile, in HR case, a significant correlation was also observed between air temperature (p=0.004) and the relative humidity (p=0.028). The high-risk thermal environment (38 °C/83 %) and subject were identified. In conclusion, it can be empirically proved that environmental factor such as temperature and relative humidity have a significant impact on workers’ performance.

Enhanced conduction-corrected modified effective temperature as the outdoor thermal environment evaluation index upon the human body

2011 ◽  
Vol 46 (1) ◽  
pp. 12-21 ◽  
Author(s):  
Yoshihito Kurazumi ◽  
Kenta Fukagawa ◽  
Yoshiaki Yamato ◽  
Kunihito Tobita ◽  
Emi Kondo ◽  
...  
Keyword(s):  
Human Body ◽  
Effective Temperature ◽  
Thermal Environment ◽  
Evaluation Index ◽  
Outdoor Thermal Environment

Numerical Simulation of the Placement of Exhaust Fans in a Tunnel-Ventilated Layer House During the Fall

2021 ◽  
Vol 64 (6) ◽  
pp. 1955-1966
Author(s):  
Xiaoshuai Wang ◽  
Jiangong Li ◽  
Jiegang Wu ◽  
Qianying Yi ◽  
Xinlei Wang ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Effective Temperature ◽  
Thermal Environment ◽  
List Type ◽  
Ventilation Strategy ◽  
Cfd Model ◽  
Tunnel Ventilation ◽  
Indoor Thermal Environment ◽  
Ventilation Strategies ◽  
Ventilation Systems

HighlightsThe placement and operation of exhaust fans was assessed using CFD simulation.The effective temperature was used to evaluate the indoor thermal environment.The placement and operation of the exhaust fans mainly affected the airflow patterns in the part of the layer house closest to the fans.Abstract. The thermal environment inside a layer house significantly affects the growth, production, and health of the hens. Tunnel ventilation systems have been widely applied to control the indoor climate and air quality for large-scale poultry facilities around the world. Generally, only a few of the exhaust fans operate during mild seasons (spring and fall) in a tunnel-ventilated layer house depending on the outside air temperature. The decision about which exhaust fans to turn on affects the indoor airflow pattern and temperature distribution. However, little research has been reported that investigated the effects of the locations of exhaust fans on ventilation performance. In this study, a computational fluid dynamics (CFD) model was built and validated using field-measured data. The CFD model was then used to evaluate different ventilation strategies (combinations of exhaust fans) in a typical tunnel-ventilated layer house during the fall. The effective temperature was used to assess the performance of different ventilation strategies. Results showed that the locations of the exhaust fans significantly affected the indoor thermal environment, especially in the part of the house closest to the fans, because different locations of operating fans can generate different airflow patterns and affect the airflow through the animal-occupied zone. Based on the simulations, we conclude that the placement and operation of the exhaust fans can be optimized. Turning on the fans that are lower to the ground or near the sidewalls will result in more air bypassing the animal-occupied zones. Our results can help select the best ventilation strategy during the spring and fall in layer houses with tunnel ventilation systems. Keywords: Airflow distribution, Effective temperature distribution, Indoor thermal environments, Ventilation strategy.

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