R134a flow boiling heat transfer in small diameter tubes [PDF]
, 2007 Copyright @ 2007 RT Edwards Inc.Boiling heat transfer in small diameter tubes has been experimentally investigated using R134a as the working fluid. The heat transfer periments were conducted with two stainless steel tubes of internal diameter 4.26 mm ...
Huo, Y, Karayiannis, TG, Tian, S
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Monthly Energy, Exergy, Environmental, and Economic Performance and Green Hydrogen Production Analysis of a Flat-Plate Solar Collector-Driven Organic Rankine Cycle System Under Variable Mass Flow and Irradiance. [PDF]
ChemistryOpenThe feasibility of using a hybrid flat‐plate solar collector–organic Rankine cycle–proton exchange membrane system for the generation of electricity, heat, and hydrogen simultaneously is analyzed. The energy efficiency of the solar thermal system reaches 23.82%, and hydrogen production of up to 13.62 kg/month is achieved while reducing CO2 emissions ...
Atiz A, Bozkurt I, Karakilcik M.
europepmc +2 more sources
Comparative Evaluation of R134a and HFO-1234ze Cryogen Spray Cooling Using a Mouse Model With Controllable Epidermal Pigmentation. [PDF]
Lasers Surg MedABSTRACT Objectives Cryogen spray cooling (CSC) is critical for protecting the epidermis during laser dermatologic procedures. The widely used cryogen, R134a, has a high global warming potential (GWP), motivating interest in environmentally favorable alternatives such as HFO‐1234ze.
Jia W +13 more
europepmc +2 more sources
Experimental flow boiling study in a 0.52 mm diameter vertical tube using R134a [PDF]
, 2008 This article is also available online from the link below.Experimental results for R134a boiling on a vertical stainless steel tube of internal diameter 0.52 mm are presented in this paper.
Shiferaw, J +3 more
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Flow boiling in a 1.1mm tube with R134a: Experimental results and comparison with model [PDF]
, 2007 A detailed comparison of the three-zone evaporation model, proposed by Thome et al. (2004), with experimental heat transfer results of two stainless steel tubes of internal diameter 4.26 mm and 2.01 mm using R134a fluid was presented by Shiferaw et al ...
Karayiannis, TG +2 more
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Flow boiling pressure drop of R134a in micro diameter tubes: Experimental results and assessment of correlations [PDF]
, 2011 This paper was presented at the 3rd Micro and Nano Flows Conference (MNF2011), which was held at the Makedonia Palace Hotel, Thessaloniki in Greece.
Mahmoud, MM +3 more
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Drop-in and retrofit refrigerants as replacement possibilities of R134a in domesticcommercial refrig
Journal of Thermal Engineering, 2021 According to the EU F-gas Regulation, the phase-out of the high global warming potential (GWP) refrigerants (with higher than 150 GWP value) had been established.
Kamel S HMOOD +4 more
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Energy and exergy investigations of r1234yf and R1234ze as R134a replacements in mechanically subcoo
Journal of Thermal Engineering, 2021 The aim of present work is the evaluation of mechanically subcooled simple vapour compression refrigeration system on the basis of energy and exergy analysis, and compatibility of alternative low GWP and zero ODP HFOs R1234yf and R1234ze to replace HFC ...
Shyam AGARWAL +2 more
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Flow boiling of R134a in vertical mini-diameter tubes [PDF]
, 2011 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University, 21/03/2011.The current study is a part of a long term experimental project devoted to investigate flow boiling heat transfer, pressure drop and flow ...
Mahmoud M, Mohamed M
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Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ, 2018 In this work, the effect of capillary tube diameter on refrigerator performance is studied for refrigerants R134a, R290, R600a and its mixture which named: RMix1(70%R134a,20%R290,10%R600a), RMix2(70%R134a,10%R290,20%R600a), RMix3.(50%R134a,20%R290,30 ...
Ali K. Al-Sayyab
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