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An Experiential Learning Exercise: Optimization of Evaporators and Condensers in a Vapor Compression Cycle

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Conference

2018 ASEE Annual Conference & Exposition

Location

Salt Lake City, Utah

Publication Date

June 23, 2018

Start Date

June 23, 2018

End Date

July 27, 2018

Conference Session

Energy Conversion and Conservation Division Technical Session on Conservation and Optimization

Tagged Division

Energy Conversion and Conservation

Page Count

22

Permanent URL

https://peer.asee.org/29785

Download Count

14

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Paper Authors

biography

David C. Zietlow Bradley University

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Professor of Mechanical Engineering

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John Sullivan

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Abstract

An experiential learning module has been developed to better help students connect the theory with the hardware. Optimizing a refrigeration cycle requires the combination of thermodynamics, heat transfer, and engineering economics. At the end of the first semester of thermodynamics students developed a system model that connected the design variables to the total life cycle cost. A portable vapor-compression testing apparatus was brought into the classroom to demonstrate electronic data collection. Different fan speeds were used to simulate different heat exchanger areas by changing the overall heat transfer coefficient (U). Once a baseline data point, at a low flow rate, was collected, U was calculated based on the actual heat transfer surface area. Then as the flow rate was increased the overall conductance (UA) increased. Fixing the U value at its baseline value simulated larger areas. These larger areas were used to determine the optimum size of the heat exchangers in the system. Data were collected during the class time and then provided to the students for model validation and subsequent optimization.

Zietlow, D. C., & Sullivan, J. (2018, June), An Experiential Learning Exercise: Optimization of Evaporators and Condensers in a Vapor Compression Cycle Paper presented at 2018 ASEE Annual Conference & Exposition , Salt Lake City, Utah. https://peer.asee.org/29785

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