Results 141 to 150 of about 4,794 (176)

A parametric study on energy, exergy and exergoeconomic assessments of a modified auto-cascade refrigeration cycle supported by a dual evaporator refrigerator

Energy, 2023
This paper presents an evaluation of the energetic, exergetic, and exergoeconomic performances of a modified auto -cascade refrigeration (MACR) cycle integrated with a dual evaporator refrigerator (DER) to determine optimum operating conditions. DER facilitates a reduction in the compression ratio, allowing the low -boilingpoint component to release ...
Ibrahim Karacayli, Lütfiye Altay, Arif Hepbasli   +2 more
semanticscholar   +3 more sources

Thermodynamic performance analysis of a grade compression auto-cascade refrigeration cycle with multi-dephlegmation processes

Energy
Sen Chen, Xiuzhen Li, Ziyun Song, Yingying Tan, Zhanwei Wang, Lin Wang   +5 more
semanticscholar   +4 more sources

Equivalent Cycle and Optimization of Auto-Cascade Absorption Refrigeration Systems

Journal of Thermal Science, 2020
Auto-cascade absorption refrigeration (ACAR) systems are a class of new cycles that can achieve low refrigeration temperatures by utilizing low-quality thermal energy. In this study, the equivalent thermodynamic processes of a reversible ACAR system are established, and illustrated in a T-s diagram. The formula of the coefficient of performance for the
Yijian He, Guangming Chen
semanticscholar   +3 more sources

Theoretical performance study on R600/R170 auto-cascade refrigeration cycle with mechanical pre-cooling

Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering
A mechanical pre-cooling auto-cascade refrigeration (PACR) system was proposed, R600a single-stage vapor compression system was used to provide pre-cooling for R600/R170 auto-cascade refrigeration (ACR) system.
Y. He, Wenliang Cao, Su’ao Wang, Kefang Xu, Xiangjie Kang, Yeqiang Zhang, Linfen Xing, Xuehong Wu   +7 more
semanticscholar   +2 more sources

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

International Journal of Exergy, 2023
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 ...
Ibrahim Karacayli, Lutfiye Altay, Arif Hepbasli   +2 more
semanticscholar   +3 more sources

Experimental characterization of an innovative refrigeration system coupled with Linde-Hampson cycle and auto-cascade cycle for multi-stage refrigeration temperature applications

Energy, 2021
Abstract In this study, a dual mixed-refrigerants refrigeration system coupled with a Linde-Hampson refrigeration (LHR) cycle and a three-stage auto-cascade refrigeration (ACR) cycle was designed and built. The thermodynamic performance of the coupled system was experimentally investigated using low GWP zeotropic mixtures of R1234yf/R32 for the LHR ...
Yanbin Qin, Nanxi Li, Hua Zhang, B. Jin, Bao-kun Liu   +4 more
semanticscholar   +2 more sources

Performance Analysis of an Ejector Enhanced Two-Stage Auto-Cascade Refrigeration Cycle for Low Temperature Freezer

Journal of Thermal Science, 2020
In this paper, an ejector enhanced two-stage auto-cascade refrigeration cycle (EARC) using ternary mixture R600a/R32/R1150 is proposed for application of −80°C freezing. In EARC cycle, an ejector was employed to recover the expansion work in the throttling processes and lifted the suction pressure of the compressor.
T. Bai, Yu Lu, G. Yan, Jianlin Yu
semanticscholar   +2 more sources

Comparative analysis of a modified cascade refrigeration cycle including an auto-cascade refrigeration cycle using different zeotropic refrigerant mixtures for reducing the environmental impact

Process Safety and Environmental Protection
The two primary challenges in auto-cascade refrigeration (ACR) cycles are high compressor discharge temperatures and low efficiency at ultra-low temperatures. This study proposes a modified cascade refrigeration cycle (MCR) combined with an ACR cycle for cooling to -60 degrees C. The innovative aspect of this work is to improve the ACR performance with
Ibrahim Karacayli, Lutfiye Altay, Arif Hepbasli   +2 more
semanticscholar   +2 more sources

Hybrid auto-cascade refrigeration system coupled with a heat-driven ejector cooling cycle

Energy, 2018
The hybrid auto-cascade refrigeration system with an integrated ejector cooling cycle (HACRS) driven by high-grade power and low-grade heat simultaneously is developed in this paper.
Hao Xinyue, Lin Wang, Wang Zhanwei, Yingying Tan, Xiaona Yan   +4 more
semanticscholar   +3 more sources

Development of a Refrigerant Mixture Package for Dynamic Simulation of Auto-Cascade Refrigeration: A Case Study with R23/R134a [PDF]

Linköping Electronic Conference Proceedings
The auto-cascade refrigeration cycle offers higher reliability and lower manufacturing costs compared to the cascade refrigeration cycle, making it particularly attractive for applications involving significant temperature differences between the heat ...
Rohit Dhumane, Dan Gorman, Rajkumar K S, Dong Huang   +3 more
semanticscholar   +3 more sources