Performance Characteristics of Solar Air Heaters By

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In recent years CFD has been applied in the design of solar air heater. The studies reported that the quality of the solutions obtained from CFD simulations are ...
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Performance Characteristics of Solar Air Heaters By Using CFD Approach By *

Dr. Ashwini Kumar Mr. Amit Kumar

*

Assistant Professor

'HSDUWPHQWRI0HFKDQLFDO(QJLQHHULQJ+6%397¶V*2, College of Engineering- Parikrama, Kasthi-414701, India.



Abstract In recent years CFD has been applied in the design of solar air heater. The studies reported that the quality of the solutions obtained from CFD simulations are largely within the acceptable range proving that CFD is an effective tool for predicting the behaviour and performance of a solar air heater. The thermal performance of conventional solar air heater is lower as compared to that of corrugated absorber plate solar air heaters. There are various types of corrugation like W-shape, V-shape; sine wave shape etc. can be used as absorber plate. The use of corrugation in different forms and shapes is an effective and economic way of improving the performance of solar air heaters. Use of corrugated absorber plate in solar air heater duct increases the Nusselt number and the friction factor with the increase in mass flow rates, the Nusselt number increases and the friction factor decreases for all combination of mass flow rates. In the present investigation the effect of flow parameters on flow field, temperature field and heat transfer has been analyzed. Also the comparison of the result obtained by the present CFD analysis with previous experimental results has been shown. Keywords: - CFD Analysis; Absorber plate; Solar air heaters; Nusselt number; Reynolds number.

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ACKNOWLEDGEMENTS The author expresses his deep sense of gratitude and indebtedness to Dr. B. N. Prasad, Professor, Mechanical Engineering Department, NIT Jamshedpur and Dr. K. D. P. Singh, Associate Professor, Mechanical Engineering Department, NIT Jamshedpur, who provided their valuable guidance, unfailing inspiration, wholehearted cooperation and help in carrying out this work. Their encouragement at each step of the work and painstaking efforts in providing in final shape to the text are gratefully acknowledged. The author gratefully acknowledges the facility provide by the institute and the department. Thanks are due to staff of Mechanical Engineering Department for their co-operation at the every step of the work. At last but not the least, the moral support and patience of my family members especially my parents Mr.Yogendra Roy & Mrs. Kiran Yadav, my wife Mrs. Bandana Singh and motivation given by my fellow friends especially Ravi Kumar and Dr. Aruna Kumar Behura is highly acknowledged.

Dr. ASHWINI KUMAR

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CONTENTS ABSTRACT

i

NOMENCLACTURE

ii

ACKNOWLEDGEMENT

iii

CONTENTS

iv

Chapter No. 1.

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Page No. 1

Solar Energy Reasons for Selecting Solar Energy Applications of Solar Energy Solar Air Heater Applications of Solar Air Heater Method of Evaluation Experimental Approach Theoretical Approach Computational Approach Corrugated Absorber Plate Solar Air Heater Literature Survey Aim and Objectives 2.

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