This document discusses methods for measuring thermal comfort and heat stress. It describes factors that influence thermal comfort such as air temperature, mean radiant temperature, humidity, air velocity, and clothing insulation. Quantitative and qualitative measurement methods are outlined. Formulas are provided for calculating heat stress indices like predicted mean vote and predicted percentage of dissatisfied. Standards for measuring thermal comfort, wet bulb globe temperature, and heat stress are listed.

1. Mike Slater
www.diamondenv.co.uk

10. Convection

11. Radiation
Convection

12. Evaporation
Radiation
Convection

19. Clothing

21. Air Mean radiant
temperature temperature
Humidity Air velocity

22. Air Mean radiant
Clothing
temperature temperature
Humidity Metabolic Air velocity
rate

23. Draughts Radiation
Asymmetry
Vertical air
Floor
Temperature
temperature
difference

25. Qualitative Quantitative

26. Qualitative Quantitative

27. 
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28. http://www.hse.gov.uk/temperature/thermal/measuringthermalcomfort.pdf

30. http://www.bohs.org/resources/res.aspx/Resource/filename/840/TG12.pdf

33. Qualitative Quantitative

34. Air Mean radiant
Clothing
temperature temperature
Humidity Metabolic Air velocity
rate

41. 1 Met = 58 Wm-2

42. 1 Clo = Insulation value of 0,155 m2 oC/W

43. Air Mean radiant
Clothing
temperature temperature
Humidity Metabolic Air velocity
rate

44. 

45. 

46. 


50. to  Ata  1  Atmr

51. www.innova.dk

53. Qualitative Quantitative

54. Qualitative Quantitative

62. http://www.hse.gov.uk/temperature/thermal/index.htm

63. http://www.bohs.org/resources/res.aspx/Resource/filename/840/TG12.pdf
http://www.bohs.org/resources/res.aspx/Resource/filename/1473/04_TG12_Addendum_to_2nd_Edition.pdf

64. • ISO 7730 (Thermal comfort)
• ISO 7743 (WBGT)
• ISO 7933 (Heat stress)

65. Acknowledgement
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66. Mike Slater
occhygiene@btconnect.com www.diamondenv.co.uk
http://diamondenv.wordpress.com/