TY - JOUR
T1 - Performance enhancement of a solar air heater using rectangular perforated duct inserts
AU - Arunkumar, H. S.
AU - Kumar, Shiva
AU - Vasudeva Karanth, K.
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/9/1
Y1 - 2022/9/1
N2 - In the present work, a rectangular aluminium absorber duct with perforations on the upper surface is placed inside the glazed solar air heater duct. Numerical analysis is carried out to study its influence on thermo-hydraulic performance. The absorber duct insert absorbs the radiation heat by inducing turbulence across the flow path due to the presence of perforations. The upper and lower passages are varied in terms of height ratio so as to create a pressure differential between them which generates a crossflow phenomenon. The perforation hole diameter and number of rows of holes are varied, and the flow physics is analysed. Results indicated that perforated configuration showed significantly higher thermo hydraulic efficiency than the plain configuration. A duct height ratio of 0.667, two row configuration with a hole diameter of 5 mm showed maximum performance with the values of thermal and thermo-hydraulic efficiency being 83.01% and 87.06% respectively.
AB - In the present work, a rectangular aluminium absorber duct with perforations on the upper surface is placed inside the glazed solar air heater duct. Numerical analysis is carried out to study its influence on thermo-hydraulic performance. The absorber duct insert absorbs the radiation heat by inducing turbulence across the flow path due to the presence of perforations. The upper and lower passages are varied in terms of height ratio so as to create a pressure differential between them which generates a crossflow phenomenon. The perforation hole diameter and number of rows of holes are varied, and the flow physics is analysed. Results indicated that perforated configuration showed significantly higher thermo hydraulic efficiency than the plain configuration. A duct height ratio of 0.667, two row configuration with a hole diameter of 5 mm showed maximum performance with the values of thermal and thermo-hydraulic efficiency being 83.01% and 87.06% respectively.
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U2 - 10.1016/j.tsep.2022.101404
DO - 10.1016/j.tsep.2022.101404
M3 - Article
AN - SCOPUS:85134892818
SN - 2451-9049
VL - 34
JO - Thermal Science and Engineering Progress
JF - Thermal Science and Engineering Progress
M1 - 101404
ER -