Advertisement

Thermal Comfort in Hot Outdoor Environment Under Unsteady Conditions

  • G. Katavoutas
  • H. A. Flocas
  • M. Tsitsomitsiou
Conference paper
Part of the Springer Atmospheric Sciences book series (SPRINGERATMO)

Abstract

One of the major problems of outdoor thermal comfort assessment is the quantification of thermophysiological parameters in order to model human heat balance, especially under unsteady conditions. In this context, the aim of this study is to investigate the thermophysiological parameters involved in human heat balance and their contribution to heat fluxes associated with the human body. This applies for a person leaving a typical indoor environment and seating quite under the shade of a tree for 30 min. In order to achieve these simulations, the Instationary Munich Energy-Balance Model (IMEM) is employed. Body temperatures and heat fluxes are modelled for a standard male at intervals of 1 min, using meteorological measurements carried out during ten experimental days under hot summer conditions. Although the current study reveals that the temporal pattern of mean skin temperature has a similar form, there are found marked quantitative differences among the experimental days, varying from 2°C to 3.2°C. This variation depends primarily on the increase of the air temperature.

Keywords

Thermal Comfort Radiant Temperature Model Subject Unsteady Condition Skin Wettedness 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

Prof. Matzarakis A. of the University of Freiburg and Prof. Höppe P., for providing the model IMEM are highly acknowledged.

References

  1. ASHRAE (2004) Thermal environmental conditions for human occupancy. ASHRAE standard 55, AtlantaGoogle Scholar
  2. Höppe PR (1993) Heat balance modelling. Experientia 49:741–746. doi: 10.1007/BF01923542 CrossRefGoogle Scholar
  3. Höppe P (2002) Different aspects of assessing indoor and outdoor thermal comfort. Energy Build 34:661–665. doi: 10.1016/S0378-7788(02)00017-8 CrossRefGoogle Scholar
  4. ISO 8996 (2004) Ergonomics of the thermal environment – determination of metabolic rate. International Organization for Standardization, GenevaGoogle Scholar
  5. Katavoutas G, Theoharatos G, Flocas HA, Asimakopoulos DN (2009) Measuring the effects of heat wave episodes on the human body’s thermal balance. Int J Biometeorol 53:177–187CrossRefGoogle Scholar
  6. Katavoutas G, Theoharatos G, Flocas HA, Asimakopoulos DN (2010) A field study of heat stress under different thermal and radiation conditions. In: Proceedings of 10th international conference of meteorology, climatology and atmospheric physics, Patras, pp 486–494Google Scholar
  7. Matzarakis A, Rutz F, Mayer H (2007) Modelling radiation fluxes in simple and complex environments – application of the RayMan model. Int J Biometeorol 51:323–334CrossRefGoogle Scholar
  8. Matzarakis A, Rutz F, Mayer H (2010) Modelling radiation fluxes in simple and complex environments: basics of the Rayman model. Int J Biometeorol 54:131–139CrossRefGoogle Scholar
  9. Nishi Y, Gagge AP (1977) Effective temperate scale for use in hypo- and hyperbaric environments. Aviat Space Environ Med 48:97–107Google Scholar
  10. Shimazaki Y, Yoshida A, Suzuki R, Kawabata T, Imai D, Kinoshita S (2011) Application of human thermal load into unsteady condition for improvement of outdoor thermal comfort. Build Environ 46:1716–1724. doi: 10.1016/j.buildenv.2011.02.013 CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • G. Katavoutas
    • 1
  • H. A. Flocas
    • 1
  • M. Tsitsomitsiou
    • 1
  1. 1.Department of Environmental Physics-MeteorologyUniversity of AthensAthensGreece

Personalised recommendations