Heat transfer and pressure drop during condensation of the low GWP refrigerant R1234yf

Col, Davide Del; Torresin, Daniele; Cavallini, Alberto

doi:10.1016/j.ijrefrig.2010.07.020

Cited by 169 publications

(27 citation statements)

References 10 publications

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“…They reported that the nucleate boiling heat transfer coefficients of HFO-1234yf are similar to those of HFC-134a and can be predicted with reasonable accuracy using existing correlations. HFO-1234yf condensation heat transfer coefficients have also been reported by Del Col et al [4] and Park et al [5]. Both studies reported lower condensation heat transfer coefficients for HFO-1234yf as compared with HFC-134a.…”

Section: Introductionsupporting

confidence: 72%

Pool Boiling Heat Transfer Characteristics of HFO-1234yf on Plain and Microporous-Enhanced Surfaces

Moreno¹,

Narumanchi²,

King

2013

Journal of Heat Transfer

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This study characterizes the pool boiling performance of HFO-1234yf (hydrofluoroolefin 2,3,3,3-tetrafluoropropene). HFO-1234yf is a new, environmentally friendly refrigerant likely to replace HFC-134a in automotive air-conditioning systems. Pool boiling experiments were conducted at system pressures ranging from 0.7 to 1.7 MPa using horizontally oriented 1-cm^ heated surfaces. Test results for pure (oil-free) HFO-1234yf and HFC-I34a were compared. The results showed that the boiling heat transfer coefficients of HFO-1234yf and HFC-134a were nearly identical at lower heat fluxes. HFO-1234yf yielded lower heat transfer coefficients at higher heat fluxes and lower critical heat flux (CHF) values as compared with HFC-134a. To enhance boiling heat transfer, a copper microporous coating was applied to the test suifaces. The coating enhanced both the boiling heat transfer coefficients and CHF for both refrigerants at all tested pressures. Increasing pressure decreased the level of heat transfer coefficient enhancements and increased the level of CHF enhancements. The experimental data were then used to develop a correlation for predicting the CHF for a smooth/plain heated surface.

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Section: Introductionsupporting

confidence: 72%

Pool Boiling Heat Transfer Characteristics of HFO-1234yf on Plain and Microporous-Enhanced Surfaces

Moreno¹,

Narumanchi²,

King

2013

Journal of Heat Transfer

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“…The design of high performance mini-channel condensers requires accurate predictive tools for both pressure drop and condensation heat transfer coefficient. For this reason, there are many international researchers working in two-phase flow heat transfer and pressure drop characterisation during condensation and boiling in mini-channels, such as Del Col et al (2010Col et al ( , 2013, Bandhauer et al (2006), Agarwal and Garimella (2008), Agarwal et al (2010) or Park et al (2011), Keepaiboon et al (2015), Markal et al (2016), Goss et al (2015), Goss and Passos (2013), Khovalyg et al (2015), Lee and Mudawar (2016) or Mori (2016) between others.…”

Section: Introductionmentioning

confidence: 99%

Condensing two-phase pressure drop and heat transfer coefficient of propane in a horizontal multiport mini-channel tube: Experimental measurements

López-Belchí

Illán-Gómez

García-Cascales

et al. 2016

International Journal of Refrigeration

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“…The design of high-performance minichannel condensers requires accurate predictive tools for both pressure drop and condensation HTC. For this reason, many international researchers have worked on two-phase flow heat transfer and pressure drop characterization during condensation in minichannels, such as Del Col et al (2010), Bandhauer et al (2006), Agarwal and Garimella et al (2008), Agarwal et al (2010), or Park et al (2011). Several publications were found in the last decade dealing with R32/R410A, including Matkovic testing the working fluid inside a single-port minichannel tube.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer coefficient during condensation inside a minichannel multiport tube with R32 and R410A as working fluids

Belchí

Gómez

García-Cascales

et al. 2015

Science and Technology for the Built Environment

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The use of microchannels and minichannels in a heat exchanger has increased in recent decades. They contribute to increasing efficiency and to reducing refrigerant charge and compactness of heat exchangers. The aim of this study is to experimentally determine the heat transfer coefficient in minichannel two-phase flow processes with the low global warming potential refrigerant R32 and to compare it with the values experimentally obtained for R410A and some of the correlations encountered in the existing literature. There are a few publications studying refrigerant R32 inside multiport minichannel tubes; this has low flammability and has been classified as A2L by ASHRAE. European air-conditioning manufacturers recommend its use instead of R410A as it has lower global warming potential (R32 GWP = 675, R410A GWP = 2088). Other environmental improvements may also be considered: R32 is a monocomponent refrigerant, so recycling is easier than R410A; it is also safer according to NFPA 704 classification; and a breathing apparatus is required in the case of an accident with R410A. On the other hand, R410A flammability is lower than R32 because of the addition of R125. An installation for the study of condensation processes has been constructed at the Technical University of Cartagena, Spain. The more relevant results of heat transfer coefficient will be presented in this article. The analyzed data have been measured for R32 and R410A flowing through aluminum square multiport tubes with a hydraulic diameter of 1.16 mm, then compared. The influence of saturation temperature (or pressure), flow velocity, and vapor quality in heat transfer coefficient and frictional pressure gradient has been studied. The values considered for these variables are saturation pressure corresponding to 30 • C, 35 • C, 40 • C, 45 • C, and 50 • C; flow velocities from 100 to 800 kg/(s·m 2 ); and vapor quality from 0.05 to 0.9.

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Heat transfer and pressure drop during condensation of the low GWP refrigerant R1234yf

Cited by 169 publications

References 10 publications

Pool Boiling Heat Transfer Characteristics of HFO-1234yf on Plain and Microporous-Enhanced Surfaces

Pool Boiling Heat Transfer Characteristics of HFO-1234yf on Plain and Microporous-Enhanced Surfaces

Condensing two-phase pressure drop and heat transfer coefficient of propane in a horizontal multiport mini-channel tube: Experimental measurements

Heat transfer coefficient during condensation inside a minichannel multiport tube with R32 and R410A as working fluids

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