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Evaluation of Suction Line-Liquid Line Heat Exchange in the Refrigeration Cycle



Piotr A. Domanski, David Didion, J. P. Doyle


The paper presents a theoretical evaluation of the performance effects resulting from the installation of a liquid-line/suction-line heat exchanger (LLSL-HX). It examines cycle parameters and refrigerant thermodynamic properties that determine whether the installation results in improvement of COP and volumetric capacity. The study shows that the benefit of application of the LLSL-HX depends on a combination of operating conditions and fluid properties -- heat capacity, latent heat, and coefficient of thermal expansion -- with heat capacity being the most influential property. Fluids that perform well in the basic cycle are marginally affected by the LLSL-HX, and the impact on the coefficient of performance and volumetric capacity may be either positive or negative. Fluids performing poorly in the basic cycle benefit from the LLSL-HX installation through increase of the coefficient of performance and volumetric capacity.
International Journal of Refrigeration
No. 7


LLSL-HX, refrigerants


Domanski, P. , Didion, D. and Doyle, J. (1994), Evaluation of Suction Line-Liquid Line Heat Exchange in the Refrigeration Cycle, International Journal of Refrigeration, [online], (Accessed June 15, 2024)


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Created January 1, 1994, Updated February 19, 2017