Advanced exergy analysis of a carbon dioxide ammonia cascade refrigeration system

2018 ◽  
Vol 137 ◽  
pp. 689-699 ◽  
Author(s):  
Ehsan Gholamian ◽  
Pedram Hanafizadeh ◽  
Pouria Ahmadi
Keyword(s):  
Carbon Dioxide ◽  
Exergy Analysis ◽  
Refrigeration System ◽  
Cascade Refrigeration System ◽  
Cascade Refrigeration

Energy and Exergy Analysis of Cascade Refrigeration System Using MC22 and MC134 on HTC, R404A and R502 on LTC

2021 ◽  
Vol 80 (1) ◽  
pp. 73-83
Author(s):  
Hendri ◽  
Roswati Nurhasanah ◽  
Prayudi ◽  
Suhengki
Keyword(s):  
Low Temperature ◽  
Exergy Analysis ◽  
Refrigeration System ◽  
Low Temperature Storage ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Cascade Refrigeration System ◽  
Cascade Refrigeration ◽  
Better Than ◽  
Temperature Storage

Low temperature storage with a single refrigeration system only stable up to 228 K temperature. The purpose of this study is to develop a low temperature cool storage with cascade refrigeration system, with hydrocarbon refrigerants in terms of energy and exergy analysis. Experimental research in laboratories using refrigerant hydrocarbon MC22 and MC134 on the hight temperature circuit, and R404A and R502 using on low temperature circuit. Condenser heat exchanger using a type of exchanger plate. Resulting from this research, obtained that result the MC22/R404A, MC22/R502 and MC134/R404A refrigerant pair can reach a temperature of 220 K. The MC22/R404A refrigerant pair has god performance, COP, total loss exergy, and exergy efficiency is better than MC22/R502, and MC134/R04A refrigerant pairs.

Advanced Exergy Analysis of a Compression–Absorption Cascade Refrigeration System

2018 ◽  
Vol 141 (4) ◽  
Author(s):  
Dario Colorado-Garrido
Keyword(s):  
Exergy Analysis ◽  
Water Solution ◽  
Lithium Bromide ◽  
Second Law Of Thermodynamics ◽  
Base Case ◽  
Refrigeration System ◽  
Future Design ◽  
Cascade Refrigeration System ◽  
Exergetic Analysis ◽  
Cascade Refrigeration

This work presents a theoretical thermodynamic study of a compression–absorption cascade refrigeration system using R134a and a lithium bromide–water solution as working fluids. First and second law of thermodynamics analyses were carried out in order to develop an advanced exergetic analysis, by splitting the total irreversibility and that of every component. The potential for improvement of the system is quantified, in the illustrated base-case 55.4% of the irreversibility is of avoidable nature and it could be reduced. The evaporator is the component that shows a significant potential for improvement, followed by the cascade heat exchanger, the compressor, and finally, the generator. The results of the advanced exergetic analysis can be very useful for future design and experimentation of these kinds of systems.

Energy and exergy analysis of low GWP refrigerants in cascade refrigeration system

Energy ◽  
2019 ◽  
Vol 170 ◽  
pp. 1170-1180 ◽  
Author(s):  
Zhili Sun ◽  
Qifan Wang ◽  
Zhiyuan Xie ◽  
Shengchun Liu ◽  
Dandan Su ◽  
...  
Keyword(s):  
Exergy Analysis ◽  
Refrigeration System ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Cascade Refrigeration System ◽  
Cascade Refrigeration

Experimental of Cascade Refrigeration System Using Natural Refrigerant Mixture Ethane and Carbon Dioxide at Low Temperature Circuit and Natural Refrigerant Propane at High Temperature Circuit

2013 ◽  
Vol 388 ◽  
pp. 96-100
Author(s):  
Nasruddin ◽  
M. Idrus Alhamid ◽  
Darwin R.B. Syaka ◽  
Arnas
Keyword(s):  
Carbon Dioxide ◽  
Low Temperature ◽  
Cold Storage ◽  
Cooling Load ◽  
Refrigeration System ◽  
Refrigerant Mixture ◽  
Cascade Refrigeration System ◽  
Cascade Refrigeration ◽  
Natural Refrigerant ◽  
Refrigeration Machine

Medicine and biomedical research activities require cold storage to store biomedical specimens such as, for example, stem cell, sperm, blood and other organs. During storage, to prevent the specimen from damage required a special cold storage reaches -80°C [1]. Using single cycle refrigeration machine can only reach -40°C, and performance deteriorates below -35°C drop in pressure associated with evaporation. Thus, to reach lower temperatures, use cascade refrigeration machine [2]. During this low-temperature circuit cascade refrigeration systems still use refrigerants that contain ozone-depleting or global warming (CFCs and HCFCs). To overcome this, a mixture of carbon dioxide and ethane azeotropic a promising alternative refrigerants. Simulation studies and experiments indicate a mixture of carbon dioxide and ethane were able to achieve the minimum temperature to -80°C [4-7]. With the mass ratio 70% R170 and 30% R744 circuit at low temperature refrigeration systems and uses a capillary tube expansion device 0.054 inch diameter with a length of 6 meters and 3 meters then use an electric heater as the cooling load. Cooling load is given by the variation of 90 W, 120 W and 150 W at a cabin in the low temperature circuit. From the experiment will be known characteristics of cascade refrigeration system with refrigerant mixture and will get the parameter data to make cascade refrigeration machine.

PERFORMANCE EVALUATION OF CASCADE REFRIGERATION SYSTEMS USING DIFFERENT REFRIGERANTS

2012 ◽  
Vol 20 (03) ◽  
pp. 1250010 ◽  
Author(s):  
ANTONIO MESSINEO ◽  
DOMENICO PANNO
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Low Temperature ◽  
Operating Parameters ◽  
Refrigeration System ◽  
Alternative Refrigerants ◽  
Negative Effects ◽  
Cascade Refrigeration System ◽  
Cascade Refrigeration ◽  
Interesting Alternative

Due to the negative effects of synthetic refrigerants on the environment, natural refrigerants have obtained again interest as alternative refrigerants for different applications because of their zero ODP and negligible GWP. This paper presents a thermodynamic analysis of different two-stage cascade refrigeration systems using as refrigerant carbon dioxide (R744) in low-temperature circuit, and, respectively, ammonia (R717), propane (R290), butane (R600), R404A, R410A and R134a in high-temperature circuit. The operating parameters considered in this study include condensing and evaporating temperatures in high-temperature circuit, temperature difference in the cascade heat exchanger, and evaporating and condensing temperatures in the low-temperature circuit. The results obtained show that a cascade refrigeration system using natural refrigerants is an interesting alternative to systems using synthetic refrigerants for energetic, security and environmental reasons.

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