Evaluation of human thermal comfort and heat stress in an outdoor urban setting in summer under arid climatic conditions

• Autorzy: Abdel-Ghany A. M. , Al-Helal I. M. , Shady M. R.

Identyfikatory

DOI

10.5277/epe140311

• Języki publikacji: EN

Abstrakty

EN

Thermal sensation and heat stress potential were evaluated in summer in an outdoor arid environment. Such evaluation had never been made in arid regions. Various scales: the temperaturehumidity index (THI), physiological effective temperature (PET), universal thermal climatic index (UTCI) and standard effective temperature (SET*) were used for the evaluation. RayMan software model was used to estimate the PET and SET* and the UTCI-calculator was used for UTCI. The required air dry and wet bulb temperatures (Td, Tw), solar radiation flux (S0) and wind speed (V) were measured in summer (April 29–July 15). The results showed that: Persons are exposed to strong heat stress and would feel very hot most of the day time; and they are safe from heat stress risk and would feel comfortable most of the night time. Heat stress levels can be determined using the PET or UTCI scales; both are valid for arid environment and their results are almost similar; however, the THI cannot be used. SET* index specifically describes the thermal sensations and discomfort conditions along with summer days at any activity under arid conditions.

Słowa kluczowe

EN

arid regions; sensory perception; thermal comfort; climatic conditions; effective temperature; human thermal comfort; solar-radiation fluxes; thermal stress; heat stress

PL

suchy klimat; percepcja sensoryczna; komfort cieplny; warunki klimatyczne; temperatura efektywna; komfort cieplny człowieka; strumienie promieniowania słonecznego; stres termiczny; stres cieplny

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2014
• Tom: Vol. 40, nr 3
• Strony: 139--150
• Opis fizyczny: Bibliogr. 23 poz., rys.

Twórcy

autor

Abdel-Ghany A. M.

• Department of Agricultural Engineering, College of Food and Agriculture Sciences, King Saud University, P.O. box 2460, Riyadh 11451, Saudi Arabia
• Department of Mechanical Power Engineering, Faculty of Energy Engineering, Aswan University, Aswan 81528, Egypt

autor

Al-Helal I. M.

• Department of Agricultural Engineering, College of Food and Agriculture Sciences, King Saud University, P.O. box 2460, Riyadh 11451, Saudi Arabia

autor

Shady M. R.

• Department of Agricultural Engineering, College of Food and Agriculture Sciences, King Saud University, P.O. box 2460, Riyadh 11451, Saudi Arabia

Bibliografia

• [1] LINDEN K., BOERSTA A.C., RAUE A.K., KURVERS S.R., Thermal indoor climate building performance characterized by human comfort response, Energ. Buildings, 2002, 34, 737.
• [2] STATHOPOULOS T., WU H., ZACHARIAS J., Outdoor human comfort in an urban climate, Build. Environ., 2004, 39, 297.
• [3] GIVONI B., NOGUCHI M., SAARONI H., BOCHTER O., YAACOV Y., FELLER N., BECKER S., Outdoor comfort research issues, Energ. Buildings, 2003, 35 (1), 77.
• [4] ANSI/ASHRAE STANDARD-55, Thermal environmental conditions for human occupancy, American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc., Atlanta, GA 30329, 2004.
• [5] ATTHAJARIYAKUL S., LEEPHAKPREEDA L., Neural computing thermal comfort index for HVAC systems, Energ. Convers. Manage., 2005, 46 (16), 2553.
• [6] FORSTHOFF A., NEFFGEN H., The assessment of heat radiation, Int. J. Ind. Ergonom., 1993, 23, 407.
• [7] Introduction to thermal comfort at: http://dt.fme.vutbr.cz/enviro/Pohoda/thermal.htm.#14
• [8] BANHIDI L., BIRO Z.B., Design and calculation possibilities for the heat exchange conditions of the human body, Periodica Polytechnica Ser., Mech. Eng., 2002, 44 (2), 185.
• [9] SERRES L., TROMBE A., MIRIEL J., Solar fluxes absorbed by dweller of glazed premises. Influence upon the thermal comfort equation, Int. J. Therm. Sci., 2001, 40, 478.
• [10] PREK M., Thermodynamical analysis of human thermal comfort, Energy, 2006, 31, 732.
• [11] YILMAZ S., TOY S., YILMAZ H., Human thermal comfort over three different land surfaces during summer in the city of Erzurum, Turky, Atmosfera, 2007, 20 (3), 289.
• [12] MAYER H., HOLST J., IMBERY F., Human thermal comfort within urban structures in a central European city, Proc. the Seventh International Conference on Urban Climate, Yokohama, Japan, 29 June–3 July 2009.
• [13] EPSTEIN Y., MORAN D.S., Thermal comfort and heat stress indices, Ind. Health, 2006, 44, 388.
• [14] DEB C., RAMACHANDRAIAH A., The significance of physiological equivalent temperature (PET) in outdoor thermal comfort studies, Int. J. Eng. Sci. Tech., 2010, 2 (7), 2825.
• [15] THORSSON S., LINDBERG F., ELIASSON I., HOLMER B., Different modes for estimating the mean radiant temperature in an outdoor urban setting, Int. J. Climat., 2007, 27, 1983.
• [16] MATZARAKIS A., RUTZ F., MAYER H., Modeling radiation fluxes in simple and complex environments. Application of the RayMan model, Int. J. Biometeo., 2007, 51, 323.
• [17] MATZARAKIS A., RUTZ F., MAYER H., Modeling the thermal bioclimate in urban areas with the RayMan model, Proc. the 23rd Conference on Passive and Low Energy Architecture, PLEA2006, Geneva, Switzerland, 6–8 September 2006.
• [18] Universal thermal climatic index UTCI document at: http://www.utci.org/utci_doku.php
• [19] UTCI calculator at: http://www.utci.org/utcineu/utcineu.php
• [20] HARVEY B., Outdoor design criteria: For the central Phoenix/east Valley Light Rail Transit System at: http://sustainability.asu.edu/docs/smartWebArticles/build_outdoordes.pdf
• [21] ABDEL-GHANY A.M., GOTO E., KOZAI T., Evaporation characteristics in a naturally ventilated fogcooled greenhouse, Renew. Energ., 2006, 31, 2207.
• [22] ITAGI T., Deployment of laborsaving and comfortable technology on cultivation Management, Handbook of Greenhouse Horticulture, JAGH, Agripress, Tokyo, Japan, 2003, 218–227.
• [23] Occupation Safety and Health Administration (OSHA), Department of Labor, USA at: http://www.osha.gov/index.htm