Heat transfer coefficient and friction factor correlations for rectangular solar air heater duct having transverse wedge shaped rib roughness on the absorber plate |
| |
| Authors: | J. L. Bhagoria J. S. Saini S. C. Solanki |
| |
| Affiliation: | 1. Department of Mechanical Engineering, M.A.C.T. (R.E.C.), Bhopal 462007, India;2. Department of Mechanical and Industrial Engineering, University of Roorkee, Roorkee 247667, India;1. JSS Academy of Technical Education, Noida, UP 201301, India;2. National Institute of Technology Kurukshetra, Haryana, India;3. National Institute of Technology Hamirpur, HP 177005, India;1. Department of Mechanical Engineering, GHRCE, Nagpur, MH, India;2. Division of Sustainable Energy Research, Department of Mechanical Engineering, Sinhgad College of Engineering, Savitribai Phule Pune University, Pune, MH 411041, India;1. Mechanical Engineering Department, Technocrats Institute of Technology-Excellence, Bhopal, MP 462021, India;2. Mechanical Engineering Department, Dr. K.N. Modi University, Newai, Rajasthan 304021, India;1. Research Scholar, Maulana Azad National Institute of Technology, Bhopal 462003, India;2. Assistant Professor, Maulana Azad National Institute of Technology, Bhopal 462003, India |
| |
| Abstract: | As is well known, the heat transfer coefficient of a solar air heater duct can be increased by providing artificial roughness on the heated wall (i.e. the absorber plate). Experiments were performed to collect heat transfer and friction data for forced convection flow of air in solar air heater rectangular duct with one broad wall roughened by wedge shaped transverse integral ribs. The experiment encompassed the Reynolds number range from 3000 to 18000; relative roughness height 0.015 to 0.033; the relative roughness pitch 60.17φ−1.0264<p/e<12.12; and rib wedge angle (φ) of 8, 10, 12 and 15°. The effect of parameters on the heat transfer coefficient and friction factor are compared with the result of smooth duct under similar flow conditions. Statistical correlations for the Nusselt number and friction factor have been developed in terms of geometrical parameters of the roughness elements and the flow Reynolds number. |
| |
| Keywords: | Solar air heater Heat transfer Friction |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
