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ICHMT DIGITAL LIBRARY ONLINE

ISSN 961-91393-0-5

Individual price:

$246.00 (Must be sent to your home address)

You can order single issue or individual article. To purchase a single issue or an individual article as well as to view tables of contents and abstracts click on issue number.

Institutional price:

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For Online Access

Year 2000

Volume 1 - Thermal Sciences 2000
Proceedings of the International Thermal Science Seminar Bled, Slovenia, June 11 – 14, 2000

604 pages

Volume price - $120.00

THE PERFORMANCE OF THE REFRIGERANTS R-134a, R290, R404A, R-407c AND R-410A IN AIR CONDITIONERS AND REFRIGERATORS

Josua Meyer
University of Pretoria

ABSTRACT

A wide range of measurements was performed on the performance of the refrigerants R134a, R-290 (propane), R-404A, R-407c, R-410A, and R-22 in a vapor compression experimental set-up. The results were used to evaluate and compare the following performance criteria: cooling capacity, coefficient of performance, compressor discharge temperature, input power, refrigerant mass flow, pressure ratio, and volumetric refrigeration capacity. The measurements were taken over a wide range of evaporating temperatures from −20 °C to 200 °C at a condensing temperature of 55 °C on the same experimental set-up. This wide selection of evaporating temperatures makes it possible to predict the performance of air-conditioning and refrigeration equipment. The results were used to compare the performances of the different refrigerants as possible substitutes for R-22. It was concluded that propane is a good long-term replacement for R-22.