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A NUMERICAL STUDY OF A HEAT EXCHANGER SYSTEM WITH A BYPASS VALVE

Zhai, Qiang
http://orcid.org/0000-0002-5673-1641
http://rave.ohiolink.edu/etdc/view?acc_num=osu1461252171

Abstract Details

2016, Master of Science, Ohio State University, Mechanical Engineering.
The primary objective of this research is to study the performance of a heat exchanger system with a bypass valve. At first a simplified double-pipe heat exchanger is considered and a computational fluid dynamic (CFD) code FluentTM 15.0 is used to analyze the heat exchanger performance. The geometry of the double-pipe heat exchanger is scaled down based on the prototypic heat exchanger design provided by Tenneco. Numerical computations are carried out for different inlet conditions provided by Tenneco. The results, including the pressure drop, thermal entrance length, and heat transfer coefficient are benchmarked against correlations available in the literature. Furthermore the performance of the heat exchanger system with a bypass valve is studied. In order to simplify the model, the heat exchanger is modeled using the porous media approach. In addition, the mal-distribution of the flow within the heat exchanger is investigated. The simulations are performed for a range of mass flow rate with both closed and open bypass valve positions. The results are compared with the values obtained using the in-house heat exchanger light tool. The ultimate goal of the thesis is to improve the performance of the overall heat exchanger system to minimize pressure losses and maximize the heat transfer efficiency. This goal could be achieved by optimizing the geometries of the bypass leg to improve the flow uniformity into the heat exchanger and optimizing the flow response dynamics for the open/closed valve positions.
Mei Zhuang (Advisor)
Xiaodong Sun (Committee Member)
156 p.
Engineering
CFD simulation; heat exchanger; heat transfer; Fluent

Recommended Citations

Citations

  • Zhai, Q. (2016). A NUMERICAL STUDY OF A HEAT EXCHANGER SYSTEM WITH A BYPASS VALVE [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461252171

    APA Style (7th edition)

  • Zhai, Qiang. A NUMERICAL STUDY OF A HEAT EXCHANGER SYSTEM WITH A BYPASS VALVE. 2016. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1461252171.

    MLA Style (8th edition)

  • Zhai, Qiang. "A NUMERICAL STUDY OF A HEAT EXCHANGER SYSTEM WITH A BYPASS VALVE." Master's thesis, Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461252171

    Chicago Manual of Style (17th edition)

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This open access ETD is published by The Ohio State University and OhioLINK.
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