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Refrigeration Cycle Educational Training Unit Development

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2020 ASEE Virtual Annual Conference Content Access


Virtual On line

Publication Date

June 22, 2020

Start Date

June 22, 2020

End Date

June 26, 2021

Conference Session

ET Pedagogy I

Tagged Division

Engineering Technology

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Paper Authors


Maher Shehadi Purdue Polytechnic Institute

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Dr. Shehadi is an Assistant Professor in the School of Engineering Technology at Purdue University. His academic experience has focused on learning and discovery in areas related to HVAC, indoor air quality, human thermal comfort, and energy conservation. While working in industry, he oversaw maintenance and management programs for various facilities including industrial plants, high rise residential and commercial buildings, energy audits and condition surveys for various mechanical and electrical and systems. He has conducted several projects to reduce CO2 fingerprint of buildings. His current work focuses on sustainable energy resources.

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Refrigeration cycles are vital in today’s industrial and domestic life. Many applications including, but not limited to, residential air conditioning, shopping malls heating ventilation and air conditioning, and food and liquid refrigeration operate with refrigeration cycles. Students graduating with a mechanical engineering technology degree, such as associate, bachelor, or technical certificate need to have sufficient hands on experience with refrigeration cycle operation, trouble shooting, analysis and optimization. An ASHRAE grant was to modify a 12,000 BTU “TRIPP LITE” portable air-conditioning unit to setup a teaching laboratory experiment related to refrigeration cycles. The experiment was equipped with pressure and temperature sensing apparatus to help in analyzing, troubleshooting, and operating various refrigeration cycles. Thermodynamics and heat transfer principles are applied to evaluate cycle efficiency, compressor power, and temperature rise and drop though the evaporator and condenser. The relative working pressures are plotted on pressure-enthalpy diagram of R410A refrigerant which was used inside the refrigeration cycle. Experimental informational outcomes will help students to understand theoretical principles in an experimental environment besides learning how to use some other equipment such as sensors, pressure gages, mass flow meter, and multi-meters. This paper presents thermodynamic refrigeration equations, experimental setup and a case study with different input variables.

Shehadi, M. (2020, June), Refrigeration Cycle Educational Training Unit Development Paper presented at 2020 ASEE Virtual Annual Conference Content Access, Virtual On line . 10.18260/1-2--35134

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