Results 231 to 240 of about 402,826 (270)

Effect of Hydrofluorocarbons and Hydrofluoroolefins in a Household Refrigerator as a Substitute for R134a

Materials Science Forum, 2019
Now a days R134a can be used in domestic refrigerators and in air conditioning of automobiles. As per Kyoto protocol the usage of R134a is restricted due to their higher GWP value. The GWP value of this refrigerant is around 1430. So in this article, thermodynamic analysis of HFC-152a, HFO refrigerants-1234ze(E) and 1234yf was done in a household ...
Shaik Mohammad Hasheer, Kolla Srinivas
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Experimental evaluation of refrigerant mixtures as substitutes for CFC12 and R502

International Journal of Refrigeration, 1997
Abstract Several selected refrigerant mixtures are tested as potential short- and mid-term substitutes for CFC12 and R502. HCFC22 and some hydrocarbons are considered as components of retrofit mixtures. Their influence on the solubility of various lubricant oils is investigated by measuring critical solubility temperatures.
Camporese, R., Bigolaro, G., Bobbo, S., CORTELLA, Giovanni   +3 more
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HFC 134a as a substitute refrigerant for CFC 12

International Journal of Refrigeration, 1988
Abstract In response to international protocol agreements and national regulatory actions promoted by the increasing concern for ozone depletion and the greenhouse effect, HFC 134a has emerged as a leading candidate for CFC 12 substitution in automotive air conditioners, centrifugal chillers and residential refrigerators and freezers.
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Substitution Effect of Magnetic Materials in Halbach Cylinder for Magnetic Refrigerators

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences, 2020
In this paper, we present the magnetic refrigeration by magnetocaloric effect, for which the magnetic flux distribution has been modified in the Halbach cylinder. The insertion of a soft magnetic rod in the bore led to the alternating magnetic field with two regions of high flux density for magnetization and two regions of low flux density for ...
Nuanjuta Niamjan, Chitnarong Sirisathitkul, Sampart Cheedket   +2 more
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Performance investigation of some hydro-fluorocarbon refrigerants with low global warming as substitutes to R134a in refrigeration systems

Journal of Engineering Thermophysics, 2014
In this study, the performances of R152a, R161, and R1234yf with very low global warming potential were investigated theoretically as alternatives to R134a in vapor compression refrigeration systems. The results obtained showed that the saturation vapor pressures for R152a and R1234yf are very close to that of R134a, which indicates similar properties,
B. O. Bolaji, Z. Huan
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Development of a high-efficiency domestic refrigerator using CFC substitutes

International Journal of Refrigeration, 1994
Abstract Besides the values of the ozone depletion and global warming potentials, energy consumption is another important index to be considered in developing a refrigeration system using CFC substitutes. Many investigators have indicated that unless the original refrigeration system is correspondingly adjusted when using CFC substitutes, the energy ...
Y Wu, G Xie, X.Z Li
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Hydrocarbons as Substitutes for Halogenated Refrigerants in Refrigerating Systems

1994
ABSTRACT The paper deals with the use of R-290/600a (50/50) and R-600a, that are now considered as alternative to R-134a to substitute R-12 in domestic refrigeration. A theoretical analysis of the mixture performance shows that both hydrocarbon refrigerants may be used. Tests of certain hermetic compressors confrrm that the mixture can be used both for
Bobbo S, Camporese R, Rozza F
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Electric energy saving potential by substitution of domestic refrigerators in Mexico

Energy Policy, 2009
Abstract We evaluate the potential for electric power saving in Mexico that would follow the substitution of old, low efficiency domestic refrigerators with modern, high efficiency ones. Our results indicate that a total substitution of domestic refrigerators would save 4.7 TWh/year, which represents 33% of the annual total consumption of 14.1 TWh ...
F.G. Arroyo-Cabañas, J.E. Aguillón-Martínez, J.J. Ambríz-García, G. Canizal   +3 more
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Metabolism in vivo and in vitro of the refrigerant substitute 1,1,1,2-tetrafluoro-2-chloroethane.

Drug Metabolism and Disposition, 1991
Ternary mixtures of hydrochlorofluorocarbons and hydrofluorocarbons are being evaluated as refrigerant substitutes for dichlorodifluoromethane, which is to be banned from further production in 2000. A priori consideration of the similarity between 1,1,1,2-tetrafluoro-2-chloroethane (HCFC-124), a primary component of candidate refrigerant blends, and ...
M J, Olson, J T, Johnson, J F, O'Gara, S E, Surbrook   +3 more
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Influence of refrigerant R1234yf as a substitute for R134a on a perfect refrigeration cycle and exchanger efficiency

Technical Transactions. Mechanics = Czasopismo Techniczne. Mechanika, 2015
The paper analyses the R1234yf refrigerant as a substitute of R134a with respect to its thermodynamic properties. For the assumed calculation parameters, identical evaporation and condensation temperature, ideal refrigeration cycles with R1234yf and R134a were compared. Moreover, for an actual car evaporator, thermal calculations were performed for the
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