Prediction Models of Skin Temperatures and Heat Loss by Evaporation for Thermal Comfort in Buildings in Hot and Humid Climates in Cameroon

Authors

  • Cyrille Brice Ze Ze University of Douala, Post-Graduation School for Pure and Applied Sciences, Mechanic and Energetic laboratory, BP 7141 Douala, Cameroon.
  • Léandre Nneme Nneme University of Douala, Post-Graduation School for Pure and Applied Sciences, Laboratory of Computer and Automatic Engineering, Higher Normal School of Technical Education (ENSET), BP: 1872 Douala, Cameroun.
  • Louis Monkam University of Douala, Post-Graduation School for Pure and Applied Sciences, Applied Sciences and Technologies Laboratory, University Institute of Technology (IUT), BP 8698 Douala, Cameroon.

Keywords:

Skin temperature, heat loss by evaporation, hot and humid climates, skin wettedness, thermal comfort

Abstract

The aim of this study is to propose models for predicting skin temperatures and heat loss by evaporation for the inclusion in the calculations of thermal comfort indicators in hot and humid areas, more particularly in sub-Saharan Africa. This will make it possible to complete the thermal comfort data for this climatic region, which for lack of it still uses the standard based on Fanger models, established mainly for the temperate zone (ISO 7730). The experiments were carried out on a representative sample of 24 people (men and women) in experimental buildings, located in the Douala-Cameroon region, representative of the hot and humid zone, as considered by numerous thermal balance references encountered in the litterature. The measurements of the ambient parameters and of the physiological parameters were carried out according to the recommended standards. 1008 skin temperature measurement points were performed on 3 levels of metabolic activity, in order to provide 72 individual average skin temperature values. Analyzes, statistical validation tests and comparisons were performed. We are able to present the most suitable prediction models, other than those of Fanger, for thermal comfort conditions in air-conditioned buildings in hot and humid areas of sub-Saharan Africa. It appears that the skin of people living in these regions has a higher thermal inertia, less water loss by diffusion or a higher skin barrier than that of people in temperate regions.

References

. J. M Stellman. Encyclopédie de sécurité́ et de santé au travail. Genève, BIT, vol. 2, 2000, pp.(42.2- 42.57).

. J. P Fohr. Echanges de chaleur et d'humidité́ homme-environnement : modèles, exemples. London ISTE Editions, oct.2015, pp.10 -160.

. ASHRAE. ASHRAE Handbook-Fundamentals (SI). Jan. 2017, pp.(9.1- 9.28).

. B. Givoni. Man, climate and architecture. Amsterdam, London, New York, Elsevier Publishing Company Limited, 1969, pp.15-103.

. B. Givoni. “Comfort, climate analysis and building design guidelines”. Energy Build, vol. 18, pp.11-23, 1992.

. V. Olgyay. Design with Climate: Bioclimatic Approach to Architectural Regionalism - New and expanded Edition. Edition: REV– Revised, Princeton University Press, 2015, pp.32-152.

. E. Mazria. The Passive Solar Energy Book (Expanded Professional Edition). Rodale Press, Jan. 1979, pp. 17-180.

. P.O. Fanger. “Calculation of thermal comfort: introduction of a basic comfort equation”. ASHRAE Transactions, vol. 73, 1967, pp.(III4.1-III4.20).

. P.O. Fanger. Thermal comfort analysis and applications in environmental engineering. McGraw-Hill, New York. 1970, pp.15-210.

. P.O. Fanger. Thermal comfort. McGraw-Hill, New York. 1972, pp.1-10.

. P.O. Fanger. “Human requirements in future air-conditioned environments”. International Journal of Refrigeration, vol. 24, pp. 148-153, 2001

. P. O. Fanger, J. Toftum. “Extension of PMV Model to Non-Air-Conditioned Buildings in Warm Climates”. Elsevier Science: Energy and Building, vol. 34, pp.533-536, 2002.

. A. P. Gagge, J.A. Stolwijik, J. F. Hardly. “Comfort and thermal sensation and associated physiological responses at various ambient temperatures”. Environmental research, vol.2, pp.209-229, Apr.1969.

. A. P. Gagge, J. Stolwijk, Y. Nishi. “An effective temperature scale based on a simple model of human physiological regulatory response”. ASHRAE Transactions, vol. 77, pp.247-262, 1971.

. A. P. Gagge, Y. Nishi, R. G. Nevins. “The role of clothing in meeting FEA energy conservation guidelines”. ASHRAE Transactions, vol. 82, pp.234-247, 1976a.

. A. P. Gagge, Y. Nishi. “Physical indices of the thermal environment”. ASHRAE Jour, vol.18, pp.47-51, Jan.1976b.

. A. P Gagge. “Heat exchange Between Human Skin Surface and Thermal Environment”. In Handbook of Physiology, Reaction to Environmental Agents. Am. Physiol. Soc, 1983, pp.69-92.

. A. P Gagge, A. P Fobelets, L. G Berglund. “A standard predictive index of human response to the thermal environment”. ASHARE transactions, vol. 92 Part 2B, pp.709-731, 1986.

. M. Humphrey. “Outdoor temperatures and comfort indoors”. Building Research and Practice, vol. 6, pp.92–105, 1978.

. M. A Humphreys, J. F Nicol. “Understanding the Adaptive Approach to Thermal Comfort”. ASHRAE Technical Data Bulletin, vol.14, pp.1-14, 1998.

. M. Humphreys, J. F Nicol. “Outdoor temperature and indoor thermal comfort: Raising the precision of the relationship for the 1998 ASHRAE database of field Studies”. ASHRAE Transactions, vol.106 part 2, pp 485-492, 2000.

. M. Humphreys, M. Hancock. “Do people like to feel neutral? Exploring the variation of the desired thermal sensation on the ASHRAE scale”. Energy & Buildings, vol.39, pp. 867-874, 2007.

. M. Humphrey, F. Nicol. “Adaptive Thermal comfort in Buildings”. The Kinki Chapter of the society of heating, Air -conditioning and Sanitary Engineers of Japan, Kyoto, 2008, pp.1-43.

. Y. Jannot, T. Djiako. “Economie d’énergie et confort thermique dans l’habitat en zone tropicale”. Département Energies pour le développement rural, E.I.E.R, 0uagadougou 03, Burkina Faso, Feb.1993.

. J. Malchaire, B. Kampmann, P. Mehnert, H. Gebhardt, A. Piette, G. Havenith et al. “Evaluation du risque de contrainte thermique lors du travail en ambiances chaudes”. Médecine et Hygiène du Travail & Ergonomie, vol. 28, pp.101-11, 2001.

. ISO. “Moderate thermal environments - determination of the PMV and PPD indices and specification of the conditions for thermal comfort”. Geneva, ISO 7730, 1994.

. ASHRAE. “Thermal environment conditions for human occupancy”. Atlanta, GA, USA, ASHRAEStandard55, 2004.

. ISO. “Ergonomics of the thermal environment - Assessment of heat stress using the WBGT (wet bulb globe temperature) index”. Geneva, ISO 7243, 2017.

. ISO. “Ergonomics of the thermal environment - Analytical determination and interpretation of heat stress using calculation of the predicted heat strain index”. Geneva, ISO 7933, 2004.

. ISO. “Ergonomics of the thermal environment-Determination and interpretation of cold stress when using required clothing insulation (IREQ) and local cooling effects”. Geneva, ISO 11079, 2007.

. B. W. Olesen, P. O. Fanger. “The skin temperature distribution for resting man in comfort”. Arch, Sci, Physiol, vol. 27, pp.A385-A393, 1973.

. B. W Olesen, K. C Pearsons. “Introduction to thermal standards and to the proposed new version of En ISO 7730”. Energy and Buildings, vol.34, pp.537-548, 2002.

. B. Moujalled, R. Cantin, G.Guarracino. “Comparison on thermal comfort algorithms in naturally ventilated office building”. Energy Build Environ, vol.40, pp.2215–2223, 2008.

. I. Holmer. “Evaluation of cold workplaces : an overview of standards for assessment of cold stress”. Industrial Health, vol.47, pp.228-234, 2009.

. A. Olissan, C. Kouchade, P. Andre, C. N. Awanou. “Le confort thermique des bâtiments en région tropicale. Application du modèle de FANGER des laboratoires de l’Université d’Abomey Calavi”. Actes SFT, 2013.

. A. Olissan. “A Influence de la fenestration en vitre sur le confort thermique des bâtiments en climat tropical et humide : cas de la bande côtière du Benin”. Thèse, Doctorat en Sciences, Université de Liège, Belgique, 2017.

. A. Kemajou, A. Tseuyep, N. E. Egbewatt. “Le confort thermique en climat tropical humide vers un réaménagement des normes ergonomiques”. Revue des Energies Renouvelables, Vol.15, pp.427-438, 2012.

. N. Djongyang, R.Tchinda. “An investigation into thermal comfort and residential thermal environment in an intertropical sub-Saharan Africa region”. Energy Conversion and Management, vol.51, pp.1391–1397, 2010a.

. N. Djongyang. “Contribution to the study of thermal comfort and coupled heat and mass transfer through building components in the sub-Saharan Africa region”. PhD Thesis, University of Yaounde I, Cameroon, 2011.

. M. Nematchoua. “Contribution to the study of thermal comfort and energy consumption in buildings: case of an equatorial sub Saharan Africa region”. PhD Thesis, University of Dschang, Cameroon, 2014.

. ISO. “Ergonomics of the thermal environment -Estimation of thermal insulation and water vapour resistance of a clothing ensemble”. Geneva, ISO 9920, 2007.

. J. Stolwijk. “A mathematical model of physiological temperature regulation in man”. NASA Contractor Report, Yale University School of Medicine, 1971.

. F. Thellier. “Modélisation du comportement thermique de l'homme et de son habitat, une approche de l'étude confort”. Thèse, Doctorat, Université Paul Sabatier, Toulouse, 1989.

. Y. Duan. “Fuzzy role based expert system for human thermoregulation model”. University of California at Berkley, California, 1999.

. C. Huizenga, Z. Hui, T. Duan and al. “An improved multinode model of human physiology and thermal comfort”. Center for Environmental Design Research, University of California, Berkeley 94720-1839, USA, 1999.

. K. Kati, L. Rongling, W. Zeiler. “Thermophysiological models and their applications: A review”. Building and Environment, vol.106, pp.286-300, 2016.

. J. Busch. “Thermal responses to the Thai office environment”. AHSRAE transactions, vol.96, pp.859-872, 1990.

. J. F. Nicol, M. A. Humphreys. “Adaptive thermal comfort and sustainable thermal standards for buildings”. Energy and buildings, vol.34, pp.563-572, 2002.

. R. J. De Dear, G. S. Brager. “Developping an adaptive model to thermal comfort and preference”. ASHARE transactions, vol.104 Part 1A, pp.145-167, 1998.

. F. H. Rohles, S. A. Konz, B. W. Jones. “Ceiling fans as extenders of the summer comfort envelope”. AHSRAE transactions, vol.89 Part 1A, pp.245-262, 1983.

. E. Arens, T. Xu, K. Miura and al. “A study of occupant cooling by personnally controlled air mouvment”. Energy and buildings, vol.27 n°1, pp.45-59, 1998.

. J. Toftum, G. Zhou, A. Melikov. Airflow direction and human sensitivity to draught”. Proceedings of CLIMA, Brussels, 2000.

. W. N. Hien, J. Tanamas. “The effect of wind on thermal comfort in the tropical environment”. Proceedings of the International Symposium on Building Research and the Sustainability of Built Environment in the Tropics, Jakarta, Indonesia, 2002.

. F. Nicol, K. Mccartney. “Smart Controls and Thermal Comfort project: final report”. Oxford Brookes University, Oxford, 2001.

. R. J. De Dear, G. S. Brager. “Thermal comfort in naturally ventilated buildings: revisions to ASHRAE Standard 55”. Energy and buildings, vol.34 n° 6, pp.549-561, 2002.

. ISO. “Ergonomics of the thermal environment -Determination of metabolic rate”. Geneva, ISO 8996, 2004.

. K. Nagano, T. Mochida. “Experiments on thermal design of ceiling radiant cooling for supine human subjects”. Building and Environment, vol. 39, pp267-275, 2004.

. ISO. “Ergonomics-Evaluation of thermal strain by physiological measurements”. Geneva, ISO 9886, 2004.

. ISO. “Ergonomics of the thermal environment-Instruments for measuring physical quantities”. Geneva, ISO 7726, 1998.

. Y. Dodge, V. Rousson. Analyse de régression appliquée. Dunod, ed.2, Oct. 2004, pp.5-180.

. R. Rakotomalala. “Tests de normalité. Techniques empiriques et tests statistiques”. Université Lumière Lyon, Lyon, ver. 2, 2011.

. V. Candas, J. P. Libert, J. J. Vogt. “Influence of air velocity and heat acclimation on human skin wettedness and sweating efficiency”. J Appl Physiol, vol.47, pp.1194-1200, 1979.

. V. Candas, J. P. Libert, J. J. Vogt. “Sweating and Sweat Decline of Resting Men in Hot Humid Environment”. Eur J Appl Physiol, vol.50, pp.223-234, 1983.

. J. M. Johnson, D. S. O'Leary, W. F. Taylor, M. K. Park. “Reflex Regulation of Sweat Rate by Skin Temperature in Exercising Humans”. J. Appl. Physiol, vol 56, pp.1283-1288, May.1984.

. N. Djongyang, R. Tchinda, D. Njomo. “Thermal comfort: a review paper”. Renewable and Sustainable Energy Reviews, vol.14, pp.2626-2640, 2010b.

. C. Zürcher, T. Frank. Physique du bâtiment- Construction et énergie. ed.1, vdf Hochschulverlag AG, 2014, pp.69-81.

. R. F. Goldman. “Clothing Design for Comfort and Work Performance in Extreme Thermal Environments”. Trans, New York Acad, Sciences Series II, vol.36, No 6, pp.531-544, 1974.

. B. W. Olesen, E. Sliwinska, T. L. Madsen, P. O. Fanger. “Effect of posture and activity on the thermal insulation of clothing. Measurement by a movable thermal manikin”. ASHRAE Transactions, vol.82, pp.791-805, 1982.

. B. W. Olesen, R. Nielsen. “Thermal insulation of clothing measured on a moveable manikin and on human subjects”. Technical University of Denmark, Lyngby, Denmark, 1983.

. B. W. Olesen. “A new and simpler method for estimating the thermal insulation of a clothing ensemble”. ASHRAE Transactions, vol.92, pp.478-492, 1985.

. T. Oohori, L. G. Berglund, A. P. Gagge. “Comparison of current two-parameter indices of vapor permeation of clothing-As factors governing thermal equilibrium and human comfort”. ASHRAE Transactions, vol.90, pp. 85–101, 1984.

. C. Martinet, J.P Meyer. “Travail à la chaleur et confort thermique”. Les notes scientifiques de l’INRS, NST 184, Institut National de Recherche et de Sécurité (INRS), Paris et Vandoeuvre-lès-Nancy, Déc 1999.

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Published

2021-06-04

How to Cite

Ze Ze, C. B. ., Nneme, L. N. ., & Monkam, L. . (2021). Prediction Models of Skin Temperatures and Heat Loss by Evaporation for Thermal Comfort in Buildings in Hot and Humid Climates in Cameroon. American Academic Scientific Research Journal for Engineering, Technology, and Sciences, 79(1), 191–219. Retrieved from https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/6857

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