Measurement of Volumetric Heat Transfer Coefficient of Porous Material
Bharat M. Ramani1, Akhilesh Gupta2,a and Ravi Kumar2,b
1Assistant Professor, A. D. Patel Institute of Technology, New V. V. Nagar, Gujarat 360 121, India.
ramani_mech@yahoo.com
2Professor, Indian Institute of Technology Roorkee, Roorkee 247 667, India.
aakhilfme@iitr.ernet.in
bravikfme@iitr.ernet.in
ABSTRACT
Use of porous material is widespread in an industrial application. The main advantage of porous material is its high surface area to volume ratio, which leads to enhance heat transport and miniaturization of thermal system. This paper presents an experimental measurement of volumetric heat transfer coefficient of porous material used in case of solar air heating collector. Wire mesh screen matrix has been used as a porous material. The range of the system and operating parameters considered are: (1) Porosity from 89.3 to 99.4% and (2) Reynolds number from 625 to 19750. The maximum experimental value of volumetric heat transfer repored is 21.94 kW/m3 – K corresponding to porosity 89.3% for the coarse wire mesh and, 21.66 kW/m3 – K corresponding to porosity 96.1 for the fine wire mesh.
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