HOW PEOPLE ADAPT TO OUTDOOR AND INDOOR CLIMATES A CASE IN THE HOT - - PowerPoint PPT Presentation
HOW PEOPLE ADAPT TO OUTDOOR AND INDOOR CLIMATES A CASE IN THE HOT AND HUMID AREA OF CHINA Yufeng Zhang, Department of Architecture, South China University of Technology, update 2014 Methods 60 local people, 30 from NV and 30 from SAC
60 local people, 30 from NV and 30 from SAC buildings Warmer indoor histories in summer and transition seasons for
20-32ºC, 50-70%, 0.1m/s, MRT=Ta, 0.57clo Both summer and winter experiments Psychological and physiological measurements
Seasonal heat acclimatization that decreases heart rate and increases skin wettedness in summer is confirmed.
Seasonal heat acclimatization has no significant impacts on human thermal sensation and comfort.
y = 0.2437x - 6.6028 R² = 0.9817 y = 0.2521x - 6.8573 R² = 0.9917
1 2 3 15 20 25 30 35 Thermal sensation SET (ºC)
NV
Sum… Winter
y = 0.7408x + 46.452 R² = 0.8867 y = 0.9896x + 47.109 R² = 0.9175
50 60 70 80 90 15 20 25 30 35 Heart rate (pulses/min) SET (ºC)
NV
Summer Winter
y = 0.2479x - 6.73 R² = 0.9899 y = 0.2964x - 7.8318 R² = 0.9869
1 2 3 15 20 25 30 35 Thermal sensation SET (ºC) NV SAC
27.1 26.4
R² = 0.98382 R² = 0.97622 29 30 31 32 33 34 35 36 15 20 25 30 35 Skin temperature (ºC) SET (ºC) NV SAC
A warmer indoor thermal history in warm seasons produces a higher neutral temperature, a lower thermal sensitivity and lower thermal sensations in warm conditions.
Indoor thermal history has no significant impacts on physiological responses.
NV group has a higher neutral MT and a lower sensitivity than others.
SAC group is similar with others.
Singapore: outdoor history is much less important than indoor history.
Location Climate Neutral MT (ºC) Thermal sensitivity (/ºC) Ref. America Temperate 25.6a 0.3376a Nevins et al. (1966) Denmark Temperate 25.7a 0.3048a Fanger, (1970) Japan (summer) Temperate 26.3 0.3448a Tanabe et al. (1987) Japan (winter) Temperate 25.3a 0.2668b Tanabe et al. (1987) Singapore Tropical 25.8a 0.4044a, b de Dear et al. (1991) Hong Kong Subtropical 24.9a, b 0.3666a Chung and Tong (1990) Guangzhou (NV) Subtropical 26.7 0.2741 Guangzhou (SAC) Subtropical 26.1 0.3263
y = -0.0117x2 + 0.9726x + 15.396 R² = 0.98
R² = 0.9905 29 30 31 32 33 34 35 36 15 20 25 30 35 Skin temperature (ºC) SET (ºC) The present study The Two-Node model
y = 0.0014x2 - 0.0654x + 0.872 R² = 0.9621
R² = 0.9962 0.0 0.1 0.2 0.3 0.4 0.5 0.6 15 20 25 30 35 Skin wettedness SET (ºC) The present study The Two-Node model
Climactic heat acclimatization that decreases skin temperature and decrease skin wettedness in warm conditions is confirmed.
Climactic heat acclimatization has no significant impacts on human thermal sensation and comfort.