Virtual On line
June 22, 2020
June 22, 2020
June 26, 2021
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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