Comparative evaluation of R1234yf, R1234ze(E) and R450A as alternatives to R134a in a variable speed reciprocating compressor

Mendoza-Miranda, Juan Manuel; Mota-Babiloni, Adrián; Ramírez-Minguela, J.J.; Muñoz-Carpio, V.D.; Carrera-Rodríguez, Marcelino; Navarro-Esbrí, Joaquin; Salazar-Hernández, Carmen

doi:10.1016/j.energy.2016.08.050

Cited by 62 publications

(23 citation statements)

References 24 publications

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“…The R448A has a higher cooling capacity (Qe) than the R404A as it is composed of the hydrofluorocarbons (HFCs) R32 [6,21,23] and has a lower global warming potential (GWP) than the R404A, which is composed of hydrofluoroolefins (HFOs) by R1234yf and R1234ze (E) [24][25]. The result show a decrease in the global warming potential by 70%, and a COP higher than R404A [26], as shown in Figure 7 [27].…”

Section: R448a Refrigerantmentioning

confidence: 98%

The Replacement of the R404A Refrigeration System with The Environmentally Friendly R448A, to Improve Convenience Store Energy Efficiency in Thailand

Saengsikhiao¹,

Taweekun²,

Maliwan³

et al. 2020

ARFMTS

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This study presents the energy saving characteristics of the R448A, instead of the R404A refrigeration system, in 5 convenience stores, with a total of 150 m 2 , situated in Central Thailand. The R448A hydrofluorocarbons/hydrofluoroolefins (HFCs/HFOs) (GWP=1390) is a non-azeotropic mixture of R32 (26%), R125 (26%), R1234yf (20%), R134a (21%) and R1234ze (E) (7%), which can be retrofitted to replace the R404A refrigeration system. The R404A hydrofluorocarbons (HFCs) (GWP=3735) is a near azeotropic mixture of R125 (44%), R143A (52%), R134A (4%). Both refrigerants are composed of polyol ester oil (POE), are incombustible and non-toxic. The R448A has a higher cooling capacity (Qe) and lower global warming potentials (GWP) than the R404A due to its hydrofluorocarbons (HFCs) R32 component and hydrofluoroolefins (HFOs) R1234yf/R1234ze (E) component, as opposed to the R404A. This was determined by measuring power consumption (kWh) and the ambient temperature (°C) through the use of power meters and temperature data logger respectively. The result obtained was able to summarize the relationship of all the parameters concerned, and showed an energy-saving average of 7.9%, i.e. 28,273 kWh/year per 5 stores, and a decreased global warming potential (GWP) of 70%, through the use of a digital scroll compressor.

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Section: R448a Refrigerantmentioning

confidence: 98%

The Replacement of the R404A Refrigeration System with The Environmentally Friendly R448A, to Improve Convenience Store Energy Efficiency in Thailand

Saengsikhiao¹,

Taweekun²,

Maliwan³

et al. 2020

ARFMTS

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“…If instead a replacement fluid for a given existing system is needed then things change because e.g., it can no longer be assumed that the compressor will work equally well with any fluid. Similar approaches are seen in experimental studies which investigate the general suitability and efficiency of different fluids in a laboratory scale test-rig [6,[11][12][13] or in single components like compressors or heat exchangers [14][15][16]. These investigations often lead to interesting heuristics, but they are not very helpful in finding replacement fluids for a concrete plant since the COP, heat flow rates and compressor power of another concrete system will have with a different fluid cannot be estimated.…”

Section: Introductionmentioning

confidence: 93%

Fluid Retrofit for Existing Vapor Compression Refrigeration Systems and Heat Pumps: Evaluation of Different Models

2019

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The global warming potential of many working fluids used nowadays for vapor compression refrigeration systems and heat pumps is very high. Many of such fluids, which are used in currently operating refrigerators and heat pumps, will have to be replaced. In order to avoid a redesign of the system, it would be very helpful if efficient and ecological alternative working fluids for a given plant could be found. With modern process simulation tools such a selection procedure seems possible. However, it remains unclear how detailed such a model of a concrete plant design has to be to obtain a reliable working fluid ranking. A vapor compression heat pump test-rig is used as an example and simulated by thermodynamic models with different levels of complexity to investigate this question. Experimental results for numerous working fluids are compared with models of different complexity. Simple cycle calculations, as often used in the literature, lead to incorrect results regarding the efficiency and are not recommended to find replacement fluids for existing plants. Adding a compressor model improves the simulations significantly and leads to reliable fluid rankings but this is not sufficient to judge the adequacy of the heat exchanger sizes and whether a given cooling or heating task can be fulfilled with a certain fluid. With a model of highest complexity, including an extensive model for the heat exchangers, this question can also be answered.

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“…The R448A has a higher cooling capacity (Qe) than the R404A as it is composed of the hydrofluorocarbons (HFCs) R32 [5,18,20]. And it has a lower global warming potential (GWP) than the R404A, which is composed of hydrofluoroolefins (HFOs) by R1234yf and R1234ze (E) [21,22]. The result shows a decrease in the global warming potential by 70%, and a COP higher than R404A as shown in Figure 7 [11,23].…”

Section: Evolution Of the Refrigerantmentioning

confidence: 99%

The Performance Simulation of The New R463A HFC/HFO/Carbon Dioxide Refrigerant with Lower GWP, As an Alternate Option for The R404A Refrigeration System

Saengsikhiao

Taweekun

Maliwan

et al. 2020

ARFMTS

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This study presents the performance simulation of the R463A that has been developed to be retrofitted to replace the R404A. The R463A is primarily composed of hydrofluorocarbons/hydrocarbon/carbon dioxide (HFCs/HCs/CO2). The R463A refrigerant (GWP=1494) is a non azeotropic mixture of R32 (36%), R125 (30%), R134a (14%), R1234yf (14%), and R744 (6%). It is composed of polyol ester oil (POE), and classified as a Class A1 incombustible and non-toxic refrigerant. The R463A has a higher cooling capacity (Qe) than the R404A, as it is composed of hydrofluorocarbons (HFCs) R32 and carbon dioxide (CO2) R744, and also has a lower global warming potential (GWP) than the R404A due to the hydrofluoroolefins (HFOs) by R1234yf. The properties of the R463A and R404A that uses the REFPROP and CYCLE_D-HX software, is in accordance to the CAN/ANSI/AHRI540 standard airconditioning , heating, and refrigeration institute (AHRI). The normal boiling point of the R463A was found to be higher than the R404A by 23%, with a higher cooling capacity and a lower GWP value by 63% than the R404A. The critical pressure and temperature of the R463A was found to be higher than the R404A, i.e. it can be used in a high ambient temperature environment, and emits a higher refrigerant effect and heat reject with a lower global warming potential (GWP) than the R404A by 52%, due to its hydrofluoroolefins (HFOs) by R1234yf component. The COP of the R463A was found to be higher than the R404A by 10% under low temperature application.

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Comparative evaluation of R1234yf, R1234ze(E) and R450A as alternatives to R134a in a variable speed reciprocating compressor

Cited by 62 publications

References 24 publications

The Replacement of the R404A Refrigeration System with The Environmentally Friendly R448A, to Improve Convenience Store Energy Efficiency in Thailand

The Replacement of the R404A Refrigeration System with The Environmentally Friendly R448A, to Improve Convenience Store Energy Efficiency in Thailand

Fluid Retrofit for Existing Vapor Compression Refrigeration Systems and Heat Pumps: Evaluation of Different Models

The Performance Simulation of The New R463A HFC/HFO/Carbon Dioxide Refrigerant with Lower GWP, As an Alternate Option for The R404A Refrigeration System

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