Comparative experimental study of an open piston compressor working with R-1234yf, R-134a and R-290

Navarro, E.; Martínez-Galván, I; Nohales, J; Gonzálvez-Maciá, José

doi:10.1016/j.ijrefrig.2012.11.017

Cited by 39 publications

(19 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recently [14], [15] have carried out a comparative experimental study of piston compressor using R1324YF, R134a and R290, while [16], [17] compared the performance of vapor injection cycles using R410a and R32.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Performance Assessment of Ozone Layer Friendly Natural Refrigerants as Potential Substitutes to HCFC’s

Boumaza¹

2015

IJCEA

View full text Add to dashboard Cite

Abstract-Due to the environmental concerns related to ozone depletion potential (ODP) and global warming potential (GWP) of the existing refrigerants, industry and researchers in this field are investigating long-term solutions. With extensive work on alternatives to chlorofluorocarbons (CFCs) and hydro chlorofluorocarbons (HCFCs), initially hydro fluorocarbons were considered to be long-term solutions. The global warming of HFCs has become a hurdle to accept them as long-term solutions. Now, the focus is on the use of natural refrigerants like hydrocarbons (HCs) such as R290, R600, ammonia, carbon dioxide and water. These natural substances have very low GWP, and a zero ODP. This paper presents thermodynamic performance analysis of R22 and three of its alternatives natural refrigerants (R290, R600a and R717) for A/C and refrigeration purposes, through a simulation model. The investigation enables to confirm the possibility of using these natural refrigerants as a substitute to R22.Index Terms-Refrigerants, performance, ozone layer, friendly. I. INTRODUCTIONAs per the Montreal protocol, the Chloro fluorocarbons (CFC's) have already been phased out in the developed countries, while the hydro chloro fluorocarbons (HCFC''s) should also be phased out by 2017.During the last two decades, the number of refrigerants likely to be used in refrigerating machines has dramatically increased as a consequence of the elimination of these refrigerants.R22 (HCFC 22) is one of the important refrigerant used in air conditioning all over the world. R22 is controlled substance under the Montreal Protocol. It has to be totally phased out by 2017.HCF 22 replacements options for A/C, heat pumps and refrigeration systems can be grouped in three categories, Fluorocarbons that are used in conventional vapor compression cycles such as R134a, R410a, R407C, alternatives fluids which include propane R290 and R717 and are also used in vapor compression cycles, and finally alternatives cycles that include absorption systems, and use Tran critical fluids (CO 2 and R744) and air cycle. In general these alternative technologies do not currently offer the same energy efficiency as the vapor compression cycle.Several investigations have been carried out in order to One of the main important parameters in choosing new refrigerants, concerns the graph which represents a plot of the saturated vapour against the temperature. This is due to the operating conditions which require the knowledge of the maximal and minimal vapour pressures. Thus it is required to avoid refrigerants which exhibit very low vapour pressure (below atmospheric pressure) at low temperatures in order to avoid air infiltration., while low ratio of compression can be considered as a positive parameter, as it enables to increase the efficiency cycle by reducing the energy consumed by the compressor. A plot of the saturated vapour pressures against the temperatures for the R22 and its potential substitutes is shown in Fig. 1. It can be seen that R407c has nearly the same pattern as R22...

show abstract

Section: Introductionmentioning

confidence: 99%

Thermodynamic Performance Assessment of Ozone Layer Friendly Natural Refrigerants as Potential Substitutes to HCFC’s

Boumaza¹

2015

IJCEA

View full text Add to dashboard Cite

show abstract

“…A figura 8 mostra o gráfico comparando as temperaturas de descarga do compressor calculadas pelo modelo e os dados de E. Navarro et al (2013). Para este caso, o erro médio de temperatura de descarga foi de 4,17% e o erro máximo de 8,92%.…”

Section: Vazão Mássica R134a E Poe Isounclassified

“…Para este caso o erro médio, quando comparado com os dados de E. Navarro et al (2013), foi de 2,06% e com erro máximo de 3,15%. Isso demonstra que o modelo está prevendo o desempenho real do compressor com uma margem de erro admissível.…”

Section: Vazão Mássica R134a E Poe Isounclassified

“…Sabendo isso, pode-se afirmar que o programa também prevê valores aceitáveis para a eficiência volumétrica. Os erros obtidos ainda podem ser melhorados, caso se consiga os dados do mesmo óleo lubrificante utilizado no artigo do E. Navarro et al (2013). O óleo lubrificante utilizado no artigo foi o POE ISO 68 e os dados do óleo lubrificante utilizado para as presentes simulações correspondem ao POE ISO 7.…”

Section: Temperatura De Descarga R134a E Poe Isounclassified

“…Mesmo sabendo dessa limitação, foi possível calcular e ver que os dados não se afastam muito dos dados experimentais de Navarro et al (2013) e, com isso, pode-se fazer uma simulação para saber o que aconteceria no compressor caso aumentasse a concentração de óleo no sistema. Isso é demonstrado no próximo capitulo.…”

Section: Eficiência Volumétrica R134a E Poe Isounclassified

See 2 more Smart Citations

Efeito Das Propriedades Termodinâmicas Da Mistura Óleo-Refrigerante No Desempenho De Um Compressor De Refrigeração

MANHAES¹

View full text Add to dashboard Cite

Introduction

Gu¹,

Wang²,

Gan³

2013

Two-Phase Flow in Refrigeration Systems

View full text Add to dashboard Cite

Comparative experimental study of an open piston compressor working with R-1234yf, R-134a and R-290

Cited by 39 publications

References 11 publications

Thermodynamic Performance Assessment of Ozone Layer Friendly Natural Refrigerants as Potential Substitutes to HCFC’s

Thermodynamic Performance Assessment of Ozone Layer Friendly Natural Refrigerants as Potential Substitutes to HCFC’s

Efeito Das Propriedades Termodinâmicas Da Mistura Óleo-Refrigerante No Desempenho De Um Compressor De Refrigeração

Introduction

Contact Info

Product

Resources

About