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Minimizing Throttline Losses in the Refrigeration Cycle
Published
Author(s)
Piotr A. Domanski
Abstract
Most alternative non-CFC refrigerants have a large molecular structure and large heat capacity, which influence the slope of saturated liquid line and result in substantial throttling losses in a basic reversed Rankine cycle. These losses degrade the cycle efficiency below that of the original CFC fluids; virtually all carbon-based non-hydrocarbon refrigerants have a lower Coefficient of Performance than the fluids banned by the Montreal Protocol. This study analyzes the performance of pure-component refrigerants in the basic refrigeration (reversed Rankine) cycle and in three modified cycles in which the throttling-process irreversibilities are minimized: the liquid-line/suction-line heat exchange (llsl-hx) cycle, the economizer cycle, and the ejector cycle. The refrigerants considered in this study were the 38 fluids covered by REFPROP /1/, and REFROP property routines were employed in performance simulations. The Carnahan-Starling-DeSantis equation of state was applied for all fluids except ammonia, for which a formulation by Harr and Gallagher was used.
Proceedings Title
International Conference of Refrigeration, 19th Proceedings
Domanski, P.
(1995),
Minimizing Throttline Losses in the Refrigeration Cycle, International Conference of Refrigeration, 19th Proceedings, Hague, , [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910532
(Accessed December 14, 2024)