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On the Work by Electricity in the First and Second Laws of Thermodynamics

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Conference

2011 ASEE Annual Conference & Exposition

Location

Vancouver, BC

Publication Date

June 26, 2011

Start Date

June 26, 2011

End Date

June 29, 2011

ISSN

2153-5965

Conference Session

Thermodynamics, Fluids, and Heat Transfer II

Tagged Division

Mechanical Engineering

Page Count

14

Page Numbers

22.1120.1 - 22.1120.14

DOI

10.18260/1-2--18865

Permanent URL

https://peer.asee.org/18865

Download Count

262

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Paper Authors

biography

Hyun W. Kim Youngstown State University

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Hyun W. Kim, Ph.D., P.E.
Hyun W. Kim is a professor of mechanical engineering and the coordinator of the mechanical enginneering graduate program at Youngstown State University. He has been teaching and developing courses in the fluid thermal area and conducting research in advanced thermodynamics, advanced fluid mechanics, and computational fluid mechanics and heat transfer . He is a Professional Mechanical Engineer in Ohio and is currently conducting applied research in fluid power control and computational fluid dynamics with local industries. Dr. Kim received a B.S.E. degree from Seoul National University, a M.S.E. from the University of Michigan, and a Ph.D. from the Univ. of Toledo.

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biography

Yogendra M. Panta Youngstown State University

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Dr. Yogendra Panta graduated from University of Nevada, Las Vegas with Ph.D. in Mechanical Engineering in 2008. He is an active member of several engineering societies including ASEE, ASME and APS. Since then, he is actively involved in research areas of Fluid Dynamics, Thermodynamics, and Microfluidics Lab on Chip applications. He has published a book, several articles and presented at several conferences. Dr. Panta has recently developed a new course on "Computational Fluid Dynamics" in the College of STEM at YSU. His research group works on CFD modeling and simulation, microfluidics lab on chip and biofluid dynamics. He is currently serving as an Assistant Professor of Mechanical Engineering at Youngstown State University.

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Abstract

On the work by electricity in the first and second laws of thermodynamicsABSTRACTIn the first law of thermodynamics analysis, energy transfer by electrical heating elements placedin a system or control volume has been traditionally treated as the electrical work rather than heattransfer from the surroundings. This treatment has been an accepted norm since there are not anyproblems or violations in dealing with this form of energy transfer as work in the first-lawanalysis. However, this practice presents a significant problem pertaining to the reversible workand the irreversibility in the second-law analysis. In this study, a number of exercise problemscontaining electrical heating have been selected from current thermodynamics texts andexamined. They were solved by the traditional way for the second-law analysis which producedsome questionable results.In this paper, case studies will be presented to show these contradictions. The apparentdiscrepancies in the relationship of actual work, reversible work, and the irreversibility are due toa fact that work does not have direct effect on entropy and entropy generation. Based on thestudy, a change seems warranted for the first-law analysis relating to the electrical work.

Kim, H. W., & Panta, Y. M. (2011, June), On the Work by Electricity in the First and Second Laws of Thermodynamics Paper presented at 2011 ASEE Annual Conference & Exposition, Vancouver, BC. 10.18260/1-2--18865

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