Heat Transfer and Pressure Drop of R1123/R32 Flow in Horizontal Microfin Tubes During Condensation and Evaporation [PDF]
, 2018 R1123 (tri fluoro ethylene; CF2 = CHF) has a GWP of approximately 1, a normal boiling point of -59 °C and a critical temperature of 59 °C, those are considered to be desirable for air condition systems.
Kondou, Chieko, Koyama, Shigeru
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Condensation and Evaporation of R744/R32/R1234ze(E) Flow in Horizontal Microfin Tubes [PDF]
, 2014 R1234ze(E) has been anticipated to become an alternative of conventional refrigerant R410A for air conditioning systems. Latest studies revealed that the COP of R1234ze(E) alone is unexpectedly lower than that of R410A, mainly caused by irreversible loss
Kondou, Chieko +3 more
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Condensation and Evaporation Heat Transfer of R-22 Inside Internally Grooved Copper Tubes [PDF]
, 2010 This paper presents the experimental investigation of heat transfer enhancement through inner grooved copper tubes in a heat exchanger. A series of tests were conducted to determine the condensation and evaporation performance of the inner grooved copper
Ling, Y.M., Rahman, M.M.
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Zhileng xuebao, 2019 In this study, the surface heat transfer coefficient was selected as the evaluation index and the two-phase flow condensation heat transfer characteristics of R134a inside a horizontal micro-fin tube with 6.35 mm outer diameter were studied.
Li Qingpu +4 more
doaj
Pressure drop, heat transfer and flow pattern maps inside smooth and enhanced tubes during convective boiling and condensation of R134a and R1234ze [PDF]
, 2019 La crescente sensibilità ambientale ha indotto la dismissione dei refrigeranti comunemente usati negli impianti HVAC. È quindi molto importante trovare dei fluidi adatti agli impianti HVAC di domani.
PHAN, THANH NHAN
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Comparison on Evaporation Heat Transfer between R32/R1234yf and R32/R1234ze(E) Flowing in Horizontal Microfin Tubes [PDF]
, 2016 Refrigerant mixtures R32/R1234yf and R32/R1234ze(E) are considered to be the low GWP alternatives of R32 and R410A for air conditioners. However, according to the recent reports, the severe heat transfer degradation is encountered during the evaporation ...
Kondou, Chieko +3 more
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R1234yf FLOW BOILING HEAT TRANSFER INSIDE A 3.4 mm ID MICROFIN TUBE [PDF]
, 2014 The use of synthetic refrigerants with a non-negligible Global Warming Potential or, on the contrary, of natural but flammable or toxic natural fluids calls for the charge minimization of the refrigerating and air conditioning equipment.
Barbosa, Jader +4 more
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Heat flux determination for nucleate boiling in subsurface tunnel structures [PDF]
, 2012 Mieczyslaw E. Poniewski +2 more
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Grassroots Participatory Budgeting Process in Negros Province [PDF]
, 2015 This paper is a narrative account and assessment of the grassroots participatory budgeting (GPB) process in three municipalities of the Negros Province, namely, Sagay City, Hinigaran, and Cauayan.
del Prado, Fatima +2 more
core
Assessment of body force effects in flow condensation, Part I: Experimental investigation of liquid film behavior for different orientations. [PDF]
Int J Heat Mass Transf, 2017 Park I +3 more
europepmc +1 more source