There is a worldwide interest in the development of auto refrigerant cascade (ARC) refrigerators operating with refrigerant mixtures. Both flammable and non-flammable refrigerant mixtures can be used in these systems. The performance of an ARC system with optimum nitrogen-hydrocarbon and argon-hydrocarbon mixtures between 90 and 160 K is presented in this paper. © 2009 Elsevier Ltd. All rights reserved.

G. Venkatarathnam

Department of Mechanical Engineering

FLAMMABLE REFRIGERANTS

HYDROCARBON MIXTURE

HYDROCARBON REFRIGERANTS

JOULE-THOMSON REFRIGERATORS

REFRIGERANT MIXTURES

ZEOTROPIC MIXTURES

Argon

Cavity resonators

Hydrocarbons

Mixtures

Refrigerators

Refrigerants

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Cryogenics

Auto refrigerant cascade (ARC) refrigerators are used extensively in the semiconductor manufacturing industry to provide refrigeration in the temperature range of 80-150 K. The performance of the ARC refrigerator depends on the mixture composition, operating pressures, etc. ARC refrigerators employ one or more liquid-vapor phase separators to separate the compressor lubricating oil and the condensed high boiling components and return to the compressor at an intermediate temperature to prevent freezing of the compressor lubricating oil and high boilers at low temperatures. However, dry-out of the phase separator can occur at some conditions. The phase separator dry-out phenomenon in ARC refrigerators has been studied experimentally with different mixtures and operating temperatures, the results of which are reported in this paper. The results of the studies show that the temperature difference between the streams at the cold end of the first heat exchanger can be used to reliably predict the dry-out of the phase separator. © 2017 by ASME.

Journal of Thermal Science and Engineering Applications

Occurrence of dry-out phenomenon in an auto refrigerant cascade refrigerator operating with zeotropic mixtures

The specific refrigeration effect that can be obtained in a single stage mixed refrigerant Joule-Thomson refrigerator is strongly dependent on the composition of mixture used. Comprehensive methods have been developed over the last two decades to determine the mixture composition that results in the highest exergy efficiency or the refrigeration produced. However, what is not well known is the relationship between the mixture composition and the hardware, which ultimately decides the performance of the refrigerator. Experiments were conducted with seven different nitrogen-hydrocarbon mixtures in a single stage JT refrigerator to understand the effect of both composition and hardware on the performance of the refrigerator, the results of which are presented in this paper. © 2011 Elsevier Ltd. All rights reserved.

Effect of mixture composition and hardware on the performance of a single stage JT refrigerator

IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA

LiF – Li2SO4 – NaCl SYSTEM

International Cryogenics Monograph Series,Cryogenic Mixed Refrigerant Processes

Simulation of cryogenic processes

Pump Industry Analyst

LNG contract in Equatorial Guinea

AIP Conference Proceedings

Performance of throttle-cycle coolers operating with mixed refrigerants designed for industrial applications in a temperature range 110 to 190 K

Thermodynamic design principle of mixed-gases Kleemenko refrigeration cycles

Performance of an auto refrigerant cascade refrigerator operating in gas refrigerant supply (GRS) mode with nitrogen-hydrocarbon and argon-hydrocarbon refrigerants

Journal	Cryogenics
ISSN	00112275
Open Access	No