Research Article | OPEN ACCESS
Characterization Phenomena of Thermal Transfer Through an Insulating Material Kapok-plaster Starting from Dynamic Impedance Method
1Y. Traore, 2E.B. Diaw, 1I. Diagne, 3M.B. Ndiaye, 2S. Tamba, 1B. Fleur, 1M. Dieng, 1A.K. Diallo and 1G. Sissoko
1Laboratory of Semiconductor and Solar Energy, Department of Physics, Faculty of Science and Technology, University Cheikh Anta Diop in Dakar
2Ecole Polytechnique of Thies-Senegal
3University of Thies-Senegal
Research Journal of Applied Sciences, Engineering and Technology 2016 7:712-715
Received: September 17, 2015 | Accepted: December 5, 2015 | Published: April 05, 2016
Abstract
Objective of study is to determine thermal properties of an insulating material from thermal impedance spectroscopy. Plaster used as binder is less than thermal insulating kapok, however thermal characteristics of kapok-plaster material, formed in Semi-conductor laboratory and Solar Energie (UCAD/Senegal), are closer to those of kapok and promotes good thermal insulation. Electrical analogy-Thermal allowed expressing the dynamic thermal impedance of material in dynamic frequency regime. Study of evolution of dynamic impedance starting from representations Nyquist was used to evaluate thermal resistance of material (shunt and serie). A relationship between thermal resistance and thermal conductivity is thus proposed. Influences of exciting frequency and heat transfer coefficient on heat transfer are highlighted.
Keywords:
Dynamic impedance, frequency dynamic regime, kapok, nyquist representation,
References
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Boukar, M., M.B. Ndiaye, A. Diene, P. Demba, I. Diagne et al., 2014. Changes in temperature in a material kapok-plaster sample in dynamic frequential regime. Res. J. Appl. Sci. Eng. Technol., 8(20): 2135-2140.
CrossRef
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Diallo, A.K., M. Boukar, M.B. Ndiaye, A. Diene, P. Demba et al., 2014. Study of the equivalent electrical capacity of a thermal insulating kapok-plaster material in frequency dynamic regime established. Res. J. Appl. Sci. Eng. Technol., 8(20): 2141-2145.
CrossRef
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Dieng, M., I. Diagne, B. Fleur, A. Kane, M.L. Sow, F. Niang and G. Sissoko, 2013. Study of heat transfer in a kapok material from the convective heat transfer coefficient and the excitation pulse of solicitations external climatic. Res. J. Appl. Sci. Eng. Technol., 5(6): 1959-1962.
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Ould Brahim, M.S., I. Diagne, S. Tamba, F. Niang and G. Sissoko, 2011a. Characterization of the minimum effective layer of thermal insulation material tow-plaster from the method of thermal impedance. Res. J. Appl. Sci. Eng. Technol., 3(4): 338-344.
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Ould Brahim, M.S., S. Tamba, M. Sarr, A. Diène, I. Diagne, F. Niang and G. Sissoko, 2011b. Evolution des coefficients globaux d'échange Thermique des matériaux kapok-plâtre et filasse-plâtre en régime dynamique fréquentiel. Revue des Energ. Renouvelables, 14(2): 203-210.
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Tamba, S., L.M. Voumbo, A. Wereme, S. Gaye and G. Sissoko, 2007. Durability of lightweight concrete made of wood chips. J. Sci., 7(4): 67-72.
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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