Artificial roughnesses in the form of ribs are an advantageous technique to improve solar air heaters' warmth quality. This research work introduces new roughness utilized in a roughened channel and assesses the effective efficiency for a gap of inclined discrete rib with staggered link geometry. A good system for improving the heat transfer between the roughened plate and the working fluid is the use of artificial geometry on the absorber roughened surface. The present new roughness geometry has parameters such as roughness pitch of rib of 8.0, attack angle of 75°, gap positions are varied between 0.3 & 0.1 – 0.3 & 0.4, aspect proportion of 8.0, rib height of 0.045 and rib gap width of 1.0. The Reynolds number range of 3000-14000. The highest improvement coefficient of friction (ƒ) and Nusselt Number (Nu) is obtained as 3.43 and 3.03 respectively, compared to the smooth channel. For the combined gap position of 0.3 & 0.3, a higher THP is achieved.
Author (s) DetailsDr. M. K. Solanki
Department of Mechanical Engineering, Maulana Azad National Institute of Technology (MANIT), Bhopal - 462003, Madhya Pradesh, India.
Dr. K. R. Aharwal
Department of Mechanical Engineering, Maulana Azad National Institute of Technology (MANIT), Bhopal - 462003, Madhya Pradesh, India.
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