Heat and Mass Transfer at Low Temperatures, in a Trapezoidal Closed Cavity

Abstract:

An experimental study, in a trapezoidal closed cavity had been led in our laboratory. The considered cavity includes a vaporizing horizontal surface, two condensing ones; one is of glass and the other of aluminium surface. It is cooled down by flowing water. The other walls are thermally isolated. Acquired results allowed to identify the regime of air flow inside the cavity, to assess the mean exchange coefficients of heat and mass, across the three walls and to write a correlation for the mean Sherwood and Nusselt numbers, established for laminar flow regime. These results are important to model many solar uses as solar distillers, solar dryers, etc… We present, in this report experimental results and in a future paper, the written mathematical model and a numerical simulation.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 2996-3003
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.2996
• Online since: July 2012
• Authors: M.S. Maalem, A. Benzaoui
• Keywords: Cavity Closed Trapezoidal, Heat and Mass Transfer, Natural Convection, Solar Distillation

References

[1] Wilcox W.R : Simultaneous heat and mass transfer in free convection. Chem. Engng. Sci. 13, pp.113-119, (1961)

[2] Saville DA, Churchill S.W.:  Simultaneous heat and mass transfer in free convection boundary layers. Fluid Mech. V.29, p.391, (1967)

[3] B. Gebhart, L. Pera: The nature of natural convection flows resulting from the combined buoyancy effect of thermal and mass diffusion. Int. J. Heat mass transfer 14, pp.2025-2050, (1971)

DOI: 10.1016/0017-9310(71)90026-3

[4] GN. Tiwari, A. Minocha , P.B. Sharma, M . Emran Khan: Simulation of convective mass transfer in a solar distillation process. Energ Convers Manage 1997;38:761–70.

DOI: 10.1016/s0196-8904(96)00082-9

[5] M.Boussaid, A. Mezenner, M. Bouhadef : Convection naturelle de chaleur et de masse dans une cavité trapézoïdale. International Journal of Thermal Sciences, Volume 38 l (1999)

DOI: 10.1016/s1290-0729(99)80103-3

[6] DJ. Reynolds, MJ. Jance, M. Behnia ,GL. Morrison: An experimental and computational study of the heat loss characteristics of a trapezoidal cavity absorber. Sol Energy 2004; 76: 229–34.

DOI: 10.1016/j.solener.2003.01.001

[7] S. Kumar: Natural convective heat transfer in trapezoidal enclosure of boxtype . Solar cooker, Renewable Energy 29 (2) (2004), p.211–222.

DOI: 10.1016/s0960-1481(03)00193-9

[8] Natarajan , Basak Tanmay,S. Roy: Natural convection flows in a trapezoidal enclosure with uniform and non-uniform heating of bottom wall. Int J Heat Mass Trans 2008;51(3–4):747–56.

DOI: 10.1016/j.ijheatmasstransfer.2007.04.027

[9] Prabal Talukdar , Conrad R. Iskra, Carey J. Simonson E: Combined heat and mass transfer for laminar flow of moist air in a 3D rectangular duct: CFD simulation and validation with experimental data.

DOI: 10.1016/j.ijheatmasstransfer.2007.08.034

[10] Ali Akbar Abbasian arani, Mostafa Mahmoodi, Meysam Amini: Free convection in nanofluid Filled square cavité with an horizontal heated plate , Defect and diffusion Forum Vol. 312-315

DOI: 10.4028/www.scientific.net/ddf.312-315.433

[11] JR. Welty - R.E Wilson – C.E. Wicks: Fundamentals of momentum heat and mass transfer. 2 nd-Edition John Willey & Sons, pp.353-376 and 765-790

[12] Mc Adams, heat transmission, Mc graw Hill New york

[13] HC. Hotel et A.F Sarofim : Radiative transfer, Mc Graw-Hill

[14] M.S. Sodha, Ashvini – Kumar, A. Srivastava and Tiwari : Thermal performance of still on roof system. Solar Energy Conversion. Vol.20, pp.181-190; 1980.

DOI: 10.1016/0196-8904(80)90032-1