Investigation on effect of fractionation on performance of two-stage separation-based auto-cascade refrigeration cycle

被引：0

作者：

Zang, Ziqing ^{[1
]}

Li, Xiuzhen ^{[1
]}

Tan, Yingying ^{[1
]}

Liu, Xiaoqing ^{[1
]}

机构：

[1] Institute of Building Energy and Thermal Science and Technology, Henan University of Science and Technology, Henan, Luoyang

来源：

Huagong Xuebao/CIESC Journal | 2025年 / 76卷

关键词：

auto-cascade refrigeration; fractionation; simulation; thermodynamic properties; two-stage separation; zeotropic mixtures;

D O I：

10.11949/0438-1157.20241390

中图分类号：

学科分类号：

摘要：

A two-stage separated auto-cascade refrigeration cycle, incorporating one or two fractionators, has been devised to enhance the refrigeration efficiency of the conventional two-stage separation-based auto-cascade refrigeration cycle (TSARC) and attain a lower refrigeration temperature. This cycle employs the zeotropic refrigerant mixture R1150/R600a as its working fluid. To assess the thermodynamic performance of various cycles—namely, the first-stage fractionation-based auto-cascade refrigeration cycle (FRARC), second-stage fractionation-based auto-cascade refrigeration cycle (SFARC), and two-stage fractionation-based auto-cascade refrigeration cycle (TFARC)—a thermodynamic model of a two-stage separation-based auto-cascade refrigeration cycle with two fractionators has been established. The results reveal an optimal composition ratio for maximizing the coefficient of performance (COP) in each of the proposed cycles. At a condensing temperature of 30℃ and an evaporating temperature of -90℃, the FRARC, SFARC, and TFARC achieve their peak COP, which are 4.9%, 6.6%, and 16.3% lower, respectively, than that of the TSARC. Additionally, these cycles yield the lowest refrigeration temperatures of -98, -98 and -100℃ . The application of fractionation to the TSARC does not improve its thermodynamic performance but does facilitate the attainment of a lower evaporating temperature. © 2025 Materials China. All rights reserved.

引用

页码：17 / 25

页数：8

共 30 条

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