Stress

1
Stress Comfort
Stress disturbs airconditioning
Tamara Derksen BSc MSc student Building
Physics 31 May 2006
2
Comfort Stress
Introduction Methodology Results Conclusions
Thermal comfort definition a condition of mind
which expresses satisfaction with the thermal
environment, not a physical measurement Stress
definition an imbalance between the perceived
demands of the environment and the perceived
resources to cope with those demands

• Source
• Thermal comfort. Analysis and applications in
  environmental engineering. P.O.Fanger, 1970
• European Agency of Safety and Health at Work,
  2005 http//agency.osha.eu.int/tmp/publications/co
  nference/magazine/5/index_3.htm

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Stress to Comfort?
Research question
Introduction Methodology Results Conclusions
How does stress influence satisfaction with
thermal comfort?
Current thermal comfort model includes (iii) air
temperature, (iv) mean radiant temperature, (ii)
activity level, (i) clothing insulation, (v)
relative humidity, (vi) air velocity
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4
Additional model of Maslow (1943)
Introduction Methodology Results Conclusions
Source Gerontechnology 5.2 blz 65-67,
J.E.M.H.Bronswijk , 2006
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Stress Comfort measured
Introduction Methodology Results Conclusions

• Research Objects 3 office in Eindhoven (n46)
• Measurements
• Physical Air temperature oC Mean radiant
  temperature oC Relative humidity Air
  velocity m/s CO2 concentration ppm Airborne
  particles (0.3 µm and 1.0 µm) counts/min
• Questionnaires the office environment survey
  (HOPE) Building Research Establishment Ltd,
  2002 extended cognitive failure questionnaire
  Broadbent, et al 1982 effort reward imbalance
  questionnaireSiegris, Peter 1996 chronic
  stressors Cairney, et al 2003 recent life
  events Cairney, et al 2003
• Data analyses Statistics, Multi variant analyses

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6
Thermal environment
Introduction Methodology Results Conclusions
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Satisfaction results
Introduction Methodology Results Conclusions
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8
Perceived Satisfaction
Introduction Methodology Results Conclusions
Correlations
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9
Stress Comfort revisited
Introduction Methodology Results Conclusions

• Dissatisfaction with the thermal environment is
  made up of
• the thermal environment,
• deficiency needs on the social level, and
• individual characteristics (age, gender,
  function)

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Stress Comfort
Introduction Methodology Results Conclusions
?
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