Modeling an effluent to influent heat exchanger for anaerobic digesters

197 Pages·2016·2.45 MB·English

Iowa State University Capstones, Theses and
Retrospective Theses and Dissertations
Dissertations
1987
Modeling an effluent to influent heat exchanger for
anaerobic digesters
Paul R. Sharp
Iowa State University
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Recommended Citation
Sharp, Paul R., "Modeling an effluent to influent heat exchanger for anaerobic digesters " (1987).Retrospective Theses and Dissertations.
11641.
https://lib.dr.iastate.edu/rtd/11641
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8716819
Sharp, Paul R.
MODELING AN EFFLUENT TO INFLUENT HEAT EXCHANGER FOR
ANAEROBIC DIGESTERS
Iowa State University PH.D. 1987
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Modeling an effluent to influent heat exchanger
for anaerobic digesters
by
Paul R. Sharp
A Dissertation Submitted to the
Graduate Faculty in Partial Fulfillment of the
Requirements for the Degree of
DOCTOR OF PHILOSOPHY
Co-Majors: Agricultural Engineering
Engineering Mechanics
Approved:
Signature was redacted for privacy.
In Charge of Major Work
Signature was redacted for privacy.
Signature was redacted for privacy.
For the Major ^ppartments
Signature was redacted for privacy.
For the Graduate College
Iowa State University
Ames, Iowa
1987
ii
TABLE OF CONTENTS
Page
NOMENCLATURE iv
INTRODUCTION 1
Preamble 1
Statement of Problem 2
OBJECTIVES 10
PROCEDURES 14
Selection of Heat Exchanger Type 14
Method of Analysis 22
Determination of effectiveness 22
Viscometry 32
Heat exchange 44
RESULTS 4 9
Viscometry 4 9
Heat Exchange 50
Discussion 51
Model performance 51
Prediction of prototype performance 51
Comparison with conventional concentric-tube
. heat exchanger 54
Value of augers 57
Role of non-Newtonian fluid in heat transfer 63
CONCLUSIONS 120
RECOMMENDATIONS FOR FUTURE RESEARCH 123
iii
BIBLIOGRAPHY 125
ACKNOWLEDGEMENTS 128
APPENDIX A: RAW DATA 129
APPENDIX B: ANALYTICAL SUPPORT 161
APPENDIX C: UNCERTAINTY ANALYSIS 173
APPENDIX D; CALIBRATION 176