Date of Award

Spring 2002

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical & Aerospace Engineering

Program/Concentration

Mechanical Engineering

Committee Director

Sushil K. Chaturvedi

Committee Member

Surendra N. Tiwari

Committee Member

Taj O. Mohielden

Call Number for Print

Special Collections; LD4331.E56 G665 2002

Abstract

A direct expansion solar-assisted heat pump, the components of which are properly matched for a specified ambient condition characterized by geographical location, has been analyzed. The steady state energy equation across the collector is solved for several refrigerants for two configurations; bare collector and one-cover collector. The REFPROP computer program, developed by the National Institute of Science and Technology, is used to predict refrigerant properties that are used in the steady state energy balance. The thermal performance as characterized by the coefficient of performance (COPn) is determined for a variety of refrigerants. A graphical procedure is developed for sizing of solar collector area and heat pump compressor displacement capacity for two configurations that use a glass cover and a bare collector, respectively.

The effects of using different refrigerants on system thermal performance are analyzed. The performance degradation due to mandated switching from refrigerant R-12 to hydro-fluoro-carbon refrigerants and refrigerant blends is investigated.

Rights

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DOI

10.25777/fr1z-2q56

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