Mathematical modelling and performance analysis of a novel auto-cascade refrigeration cycle for ultra-low temperature applications

被引：2
|
作者：
Karacayli, Ibrahim [1 ]
Altay, Lutfiye [2 ]
Hepbasli, Arif [3 ]
机构：
[1] Ege Univ, Grad Sch Nat & Appl Sci, TR-35100 Bornova, Izmir, Turkiye
[2] Ege Univ, Fac Engn, Dept Mech Engn, TR-35100 Bornova, Izmir, Turkiye
[3] Yasar Univ, Fac Engn, Dept Energy Syst Engn, TR-35100 Bornova, Izmir, Turkiye
来源：
INTERNATIONAL JOURNAL OF EXERGY | 2023年 / 42卷 / 02期
关键词：
ultra-low temperature; refrigeration; auto-cascade refrigeration; ACR; exergy analysis; coefficient of performance; COP; second law efficiency; EXERGY;
D O I：
10.1504/IJEX.2023.134611
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The main objective of this study is to assess both energetically and exergetically the performance of a novel auto-cascade refrigeration (NACR) cycle enhanced by an internal heat exchanger using R290/R170. In contrast to the ACR cycle with a -60 degrees C evaporation temperature, the NACR cycle displays a COP increase of 140.78% and a 148.67% improvement in exergy efficiency. Additionally, there is a notable decrease of 13.77% in compressor discharge temperature. For an evaporation temperature of -55 degrees C, the NACR cycle achieves a COP of 0.403 and an exergy efficiency of 14.61%, with the compressor discharge temperature registering at 126.60 degrees C.
引用
收藏
页码：229 / 245
页数：18
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