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Packed Bed Regenerator. CFD Analysis

by Dr. Kuldeep Panwar (Author) Er. Kuldep Rawat (Author) Dr. Neeraj Bisht (Author)

Textbook 2016 53 Pages

Engineering - Mechanical Engineering

Excerpt

TABLE OF CONTENTS

Preface

About the Authors

Table of Contents

CHAPTER 1 INTRODUCTION
1.1 Heat Exchangers
1.2 Heat Regenerators
1.3 Heat Regenerator Types
1.4 Advantages of Regenerators
1.5 Applications of Regenerators
1.6 Pressure drop and Drag coefficient in Fixed bed Regenerator
1.7 Thermal characteristics of Fixed bed regenerator
1.8 Transient CFD analysis of Fixed bed regenerator

CHAPTER 2 REVIEW OF LITERATURE

CHAPTER 3 MATHEMATICAL & COMPUTATIONAL MODELING
3.1 Mathematical Modeling of Fixed bed regenerator
3.2 CFD Analysis
3.3 Computational Model
3.3.1 Skewness Factor
3.3.2 Aspect Ratio
3.3.3 Governing Equations
3.4 Boundary Conditions
3.5 Solution Method

CHAPTER 4 COMPUTATIONAL SIMULATION ON ANSYS FLUENT .17
4.1 Analysis of Thermal Characteristics of Fixed-bed Regenerator
4.2 CFD Analysis of Fixed-bed Regenerator
4.3 Variation of Effectiveness of Fixed-bed Regenerator With its length

CHAPTER 5 BOOK AT A GLANCE

CHAPTER 5 LITERATURE CITED

PREFACE

Heat Exchangers are the devices which are used to transfer heat from one fluid to another. Heat exchangers are classified on the basis of how the heat is transferred between the fluids.If there is direct contact between the two fluids then the heat exchangers are classified as direct contact heat exchangers and if there is no contact between the fluids they are classified as indirect contact heat exchangers. Further indirect contact heat exchangers are classified as Recuperators, storage type exchangers and fluidized bed heat exchangers. The heat regenerator works on two cycles i.e. heating cycle and cooling cycle. During heating cycle the flue gases enters the regenerator and flows through the bed. The heat is absorbed by the packing material bed and the flue gases at lower temperature flow out from the regenerator. In cooling cycle the air from opposite direction is made to enter the sane regenerator through the bed and heat is transferred from the packing materials to the air. The time for which the flues gases are remained in the regenerator is known as thermal residence time of flue gas. Thermal residence time has a great effect on the effectiveness of the regenerator.

The time at which the heating cycle is switched with cooling cycle is called Switching time. Switching time is very important factor in regenerator working, only by properly adjusting the switching time one can improve the efficiency of the regenerator. For the study of temperature variation throughout the regenerator bed length, the regenerator is modeled in the Ansys design modular and after proper meshing of the model in GAMBIT it is imported in Ansys Fluent, where the transient simulation with time step of 10e-3 and switching time or cycle time of 1 minute is carried out for regenerator with D/dp 3, 8, 12. This transient CFD simulation of flue gases in heating cycle and ambient air in cooling cycle is continued till the steady state in temperature flow is reached.

Dr. Kuldeep Panwar

Er. Kuldeep Rawat

Dr. Neeraj Bisht

ABOUT THE AUTHORS

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Dr. Kuldeep Panwar is currently working as Associate Professor & Head of Mechanical and Automation Engineering Department at Delhi Technical Campus, Greater Noida. He completed his Bachelors of Engineering from B.T.K.I.T, Dwarahat (erstwhile KEC) in 2009, and his Masters in Thermal Engineering in 2012. He completed his PhD in Mechanical Engineering from G. B. Pant University of Agriculture and Technology, Pantnagar in 2016. His doctoral research area was analysis of thermal and resistance characteristics of fixed-bed regenerator with small D/dp ratio. He has published more than 30 research articles in peer-reviewed international journals and conferences. He has one design patent to his credit. He has authored a book titled Effect of Insolation on Efficiency of Solar Plate Collectors and has also contributed as an editor in four conference proceedings.

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Er. Kuldeep Rawat is currently working as Associate Professor & Head of Mechanical Engineering Department at Shivalik College of Engineering, Dehradun. He completed his Masters in Thermal Engineering in 2012 from Dehradun Institute of Technology. He has published more than 20 research articles in peer-reviewed international journals and conferences.

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Dr. NeerajBisht is presently with the Department of Mechanical Engineering. He obtained his BE degree from KEC, Dwarahat. Thereafter, he did his M.Tech and PhD from GBPUAT. He has a rich teaching and diversified research experience. The areas of his research interests include Machine Design, Experimental and Numerical Solid Mechanics. He has several publications in peer-reviewed journals/conferences of national and international repute.

Details

Pages
53
Year
2016
Language
English
Catalog Number
v495135
Grade
Tags
packed regenerator analysis

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Title: Packed Bed Regenerator. CFD Analysis