A comparison of the operating performance of alternative refrigerants

Halimic, Elvedin; Ross, D. A.; Agnew, Brian; Anderson, Alexander; Potts, Ian

doi:10.1016/s1359-4311(03)00081-4

Cited by 67 publications

(33 citation statements)

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“…More specifically, refrigeration is that branch of science which deals with the process of decreasing and maintaining the temperature of any space or material below the temperature of the atmosphere [1]. According to ASHRAE, it is defined as the science of providing and maintaining temperature below that of surroundings [2]. For the past half century, CFCs have been used extensively in the refrigeration sector.…”

Section: Introductionmentioning

confidence: 99%

“…They have zero ozone depletion potential and a greenhouse warming potential approaching zero. Many researchers have reported performance evaluation of hydrocarbon mixtures by both experimental and simulation methods [1][2][3][4][5]. India and China are the largest refrigerator demanding countries in the world, have been quite active in the application of hydrocarbons in domestic refrigerators.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Evaluation of Refrigerant Mixtures as Substitutes for HFC134a

Paliwal¹

2017

IOSR JMCE

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Refrigerant Mixtures as Substitutes for HFC134a

Paliwal¹

2017

IOSR JMCE

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“…First, a large amount of thermal energy is required to change a liquid to a vapor, and therefore a lot of heat can be removed from the air-conditioned space. Second, the isothermal nature of the vaporization allows extraction of heat without raising the temperature of the working fluid to the temperature of whatever is being cooled [4][5].…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment of HFC Group Refrigerants in Window Air Conditioning System

Hadya¹

2015

IJMEA

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This paper discusses the different operating conditions of three refrigerants i.e. R22, R410A and R32. For analysis 1Ton of window air conditioner has been chosen. Basically the operating cycle is a simple vapour compression refrigeration cycle with hermitically sealed compressor. The HFC groups of refrigerants do not have any Ozone Depletion Potential and refrigerants like R32 has the advantage of lower Global Warming Potential (GWP:675) with compare to R22 (GWP:1700) and R410A(GWP:2100) refrigerants. As per the indication of Montreal and Kyoto protocol, the world community has decided to phase down the HCFC group refrigerants. The refrigeration and air conditioning industry required to evaluate new alternative refrigerants to HCFC-22 also known as R22. The performance parameters like, pressure ratio, condensing temperature, discharge temperature of the compressor, power consumption and COP of the system were analyzed and compared.

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“…In some cases, it has even been observed that refrigerants with longer lifetimes can have a higher negative environmental impact than what can be expected by measuring their actual concentration in the atmosphere (Halimic, et al 2003). Atmospheric lifetime has been linked directly and indirectly with global warming.…”

Section: Half-life Time In Tropospherementioning

confidence: 99%

Multi-objective optimization of the molecular structure of refrigerants

Bhargava¹

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Bhargava, Suvrat, "Multi-objective optimization of the molecular structure of refrigerants" (2010 The aim of this work was to develop a new methodology, which can be used to design new refrigerants that are better than the currently used refrigerants. The methodology draws some parallels with the general approach of computer aided molecular design. However, the mathematical way of representing the molecular structure of an organic compound and the use of meta models during the optimization process make it different. In essence, this approach aimed to generate molecules that conform to various property requirements that are known and specified a priori. A modified way of mathematically representing the molecular structure of an organic compound having up to four carbon atoms, along with atoms of other elements such as hydrogen, oxygen, fluorine, chlorine and bromine, was developed. The normal boiling temperature, enthalpy of vaporization, vapor pressure, tropospheric lifetime and biodegradability of 295 different organic compounds, were collected from open literature and data bases or estimated. Surrogate models linking the previously mentioned quantities with the molecular structure were developed.

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A comparison of the operating performance of alternative refrigerants

Cited by 67 publications

References 1 publication

Experimental Evaluation of Refrigerant Mixtures as Substitutes for HFC134a

Experimental Evaluation of Refrigerant Mixtures as Substitutes for HFC134a

Performance Assessment of HFC Group Refrigerants in Window Air Conditioning System

Multi-objective optimization of the molecular structure of refrigerants

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