Theoretical Evaluation Of The Potential Of Evaporative Cooling For Human Thermal Comfort In West Africa
Ibrahim U. Haruna, Ishaq Musa, Muhammad I. Tikau, Unwaha J. Ibrahim
Index terms: Thermal comfort, Feasibility index, Evaporative cooler, selected cities, Climate
Abstract: The realization of thermal comfort through the use of refrigerated-based air conditioning systems is largely impeded by poverty and epileptic power supply. Furthermore, the use of some refrigerants has negative effect on the environment. Evaporative cooling systems are viable options for achieving thermal comfort because, apart from their low cost and power requirement, they are environmentally friendly. This paper attempts to determine the viability of using direct evaporative coolers to achieve human thermal comfort in several West African cities characterized by different climates using the feasibility index method. Employing the concept of the feasibility index reveals the suitability of using evaporative coolers in Agadez, Bamako, Diffa, Jos, and Nema while Conakry, Gagnoa and Port Harcourt are not recommended for the use of evaporative coolers. Evaporative coolers are therefore suitable alternative to refrigerated-based air conditioning systems for achieving human thermal comfort in these areas and in similar areas with high evaporative cooling potentials.
. Cengel, Y.A. (2002). “Heat Transfer: Practical Approach”. First Revised Edition.Tata McGraw-Hill Publishing Company Ltd, New Delhi.
. www.docstoc.com/.../Energy-Efficient Space Cooling-A case for evaporative cooling
. Vivek, W.K, 2011. “Experimental Investigation of Desert Cooler Performance Using Four Different Cooling Pad Materials”. American Journal of Scientific and Industrial Research 2(3): 418-421. 2011, science Huβ, http://www.scihub.org/AJSIR , doi: 10.5251/ajsir. 2011.2.3.418.421
. Camrago, J.R., Ebinuma, C.D., and Siveria,J.L.2005. “Experimental Performance of Direct Evaporative Cooler operating during summer in Brazilian City”, International Journal of Refrigeration, Vol. 28 pp1124-1136. http://www.academicjournals.org/AJSIR
. Valesco, E., Rey, F.J., Varela, F., Molina, MJ. and Herrero. R, 2005. “Description and Experimental results of a semi-indirect ceramic evaporative Cooler”. International Journal of Refrigeration 28, 654-662. http://dx.doi.org/10.1016/j.ijrefrig.2005.01.004 .
. Camrago, J.R., Ebinuma, C.D. and Cardoso, S, 2006. Three methods to evaluate the use of Evaporative Cooling for human thermal comfort. Thermal Engineering,vol. 5, No. 02, pp. 09-15. http://demec.ufpr.br
. Gunhan, T., Demir, V. and Yagcioglu, A.K, 2007. Evaluation of the suitability of some local materials as Cooling pads.Biosystem Engineering 96(3) pp. 369-377. www.sciencedirect.com
. Isaac, F.O. and Onwuka, O, 2009. A Review of Porous Evaporative Cooling for the Preservation of Fruits and Vegetables, Pacific Journal of Science and Technology. Vol. 10, No. 2, pp. 935-941. http://www.akamaiuniversity.us/PJST.htm
. Qun, C., Kangding, Y., Moran, W., Ning, P. and Zen-Yuan, G, 2010. A new approach to analysis and optimization of evaporative cooling system 1: Article in Press, Energy xxx, pp. 1-7. doi: 10.1016/j.energy.2010.02.037
. Kulkarni, R.K. and Rajput, S.P.S, 2010. “Theoretical Performance Analysis of Jute Fiber Rope Bank as Media in Evaporative Coolers”. Indian Journal of Science and Technology. Vol. 3, No. 10, pp. 1075-1080. jute for air conditioning http://www.indjst.org
. Metin, D., Cengiz, K., Levent, S. and Yilmaz, Y, 2010. “Determination of the Relationship Among Air Velocity, Cooling Efficiency and Temperature Decrease at Cellulose based Evaporative Cooling Pad”. African Journal of Agricultural Research, Vol. 5 (24), Pp 3477-3482. http://www.academicjournals.org/AJAR
. Valesco,E., Rey, M.A. and Tejoro, G.A, 2010. “The phenomenon of evaporative Cooling from a Humid surface as an alternative method for air-conditioning” International Journal of Energy and Environment, Volume 1, Issue 1, Pp 69-96. http://www.IJEE.IEEFoundation.org
. Kulkarni, R.K. and Rajput, S.P.S, 2011. “Theoretical Performance Analysis of Indirect-Direct Evaporative Cooler in Hot and Dry Climates”. International Journal of Engineering Science Technology (IJEST), Vol. 3, No. 2, pp. 1239-1251. http://www.ipublishing.co.in/jarvol1no1210/EIJAER2046.pdf
. Metin, D., Cengiz, K., Levent, S. and Yilmaz, Y., Ali, B. and Omer, P, 2011. The Effect of Air Velocity on the Performance of Pad Evaporative Cooling Systems. African Journal of Agricultural Research, Vol.6 (7), pp. 1813-1822. http://www.academicjournals.org/AJAR
. Kulkarni, R.K. and Rajput, S.P.S, 2011. Comparative performance of evaporative cooling pads of , Alternative materials, International Journal of Advanced Engineering and Technologies, vol. 10, issue No. 2, pp. 239-244. 2011 http://ijaest.iserp.org
. World Meteorological Organisation (WMO), Daily Climate Weather Data Statistics, 2011 www.geodata.us/weather/place.php?usaf=650460...c=Nigeria
. Jain, D. (2007). Development and Testing of Two-stage Evaporative Cooler. Building and Environment, 42, pp 2549-2554.