Results 21 to 30 of about 386 (171)

Fundamental equation of state for R1234yf

open access: yesJournal of Physics: Conference Series, 2019
Abstract Unified fundamental equation of state for R1234yf has been developed that satisfies the scaling critical point theory. It has been demonstrated that the proposed equation of state truly represents the peculiarities of the thermodynamic surface from the qualitative and quantitative point of view: first, in the regular part of the
V A Rykov, S V Rykov, A V Sverdlov
openaire   +1 more source

Performance Analysis of Transcritical CO2 and R1234yf High Temperature Heat Pump Water Heater at Low Ambient Temperature

open access: yesZhileng xuebao, 2023
In heat pumps, the use of environmentally friendly refrigerants can reduce damage to the ozone layer. Under the condition of low ambient temperature, based on the existing heat pump system, the CO2 transcritical cycle and mechanical subcooling were ...
Zhang Ning   +7 more
doaj  

Energetic and exergetic performance comparison of an experimental automotive air conditioning system

open access: yesJournal of Thermal Engineering, 2021
In this study, the energetic and exergetic performance merits of an automotive air condition-ing (AAC) system using R134a and R1234yf have been investigated.
Alpaslan ALKAN, Ahmet KOLIP, Murat HOSOZ
doaj   +1 more source

The Experimental Assessment of R134a and Its Lower GWP Alternative R1234yf in an Automobile Air Conditioning System

open access: yesJournal of Engineering, 2019
Reducing global warming potential (GWP) of refrigerants is needed to the decrease of ozone-depleting of refrigeration systems leakages. Refrigerant R1234yf is now used to substitute R134a inside mobile air conditioning systems.
Rafah Hussain, Issam Mohammed ali
doaj   +1 more source

CFD Based Design for Ejector Cooling System Using HFOS (1234ze(E) and 1234yf)

open access: yesEnergies, 2020
The field of computational fluid dynamics has been rekindled by recent researchers to unleash this powerful tool to predict the ejector design, as well as to analyse and improve its performance.
Anas F A Elbarghthi   +3 more
doaj   +1 more source

Theoretical analysis of a Low GWP Refrigerants as a Drop in substitute of R134a in a Domestic Refrigerator [PDF]

open access: yesIranica Journal of Energy and Environment, 2018
Now a days Fridges and Air-conditioners are mostly used in domestic environment. The CFCs have been almost ruled out since 1995 due to their huge impact on the ozone layer, due to the above problem HFC refrigerants are introduced but these are having a ...
M. Shaik Sk, K. Srinivas
doaj   +1 more source

R1234yf and R744 as alternatives to R134a at mobile air conditioners

open access: yesJournal of Energy Systems, 2021
R1234yf is a synthetic HFO refrigerant co-developed as a replacement refrigerant for R134a in automotive air conditioning applications. Thus, in this study, alternatives to the R134a refrigerant that were removed from the newly produced devices were examined.
Cenk ONAN, Serkan ERDEM
openaire   +3 more sources

Performance Evaluation of an Adsorption Heat Pump System Using MSC-30/R1234yf Pair with the Impact of Thermal Masses

open access: yesApplied Sciences, 2021
In this study, we evaluated the performance of low Global Warming Potential (GWP) refrigerant R1234yf on the activated carbon (MSC-30) for adsorption heating applications.
Sangwon Seo   +4 more
doaj   +1 more source

A Detailed Review of Colburn and Friction Factors for Various Types of Fins Used in Compact Plate‐Fin Heat Exchangers

open access: yesHeat Transfer, Volume 55, Issue 6, Page 3495-3522, September 2026.
ABSTRACT Compact plate‐fin heat exchangers (PFHEs) are commonly utilized in diverse industries, including aerospace, automotive, processing, and space. Various fin configurations, such as Plain fins, Wavy fins, Lance and Offset fins (OSFs), Perforated fins, louvered fins, and pin fins, are employed in compact heat exchangers (CHEs).
Chennu Ranganayakulu
wiley   +1 more source

Theoretical analysis of R1234yf and R1234yf/R125 mixture as replacement of R134a in vapor compression system

open access: yesInternational Journal of Low-Carbon Technologies
Abstract In this article, in order to reduce the climate hazards caused by global warming, a new environmentally friendly mixed refrigerant, R1234yf/R125 (with a mass ratio of 95:5), is introduced. Alongside R1234yf, the article conducts theoretical research to assess the feasibility of substituting R134a in vapor compression systems ...
Yongmei Lin   +5 more
openaire   +1 more source

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