Condensation heat transfer coefficients of flammable refrigerants

Jung, Dongsoo; Chae, Soonam; Bae, Dongsoo; Oho, Sukjae

doi:10.1016/j.ijrefrig.2003.09.006

Cited by 33 publications

(7 citation statements)

References 5 publications

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“…The Zukauskas formula [16] is used for the single-phase convective heat transfer of seawater flowing across the tube banks. In the condenser, the propane condenses outside the tube, and the classical correlation for film condensation [17] is applied. LNG expands in a single phase, and the correlation for supercritical fluid by Bae and Kim [18] is applied.…”

Section: Mmentioning

confidence: 99%

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One-dimensional numerical study of thermal performance of an organic Rankine cycle system using liquefied natural gas as a cold source for cold energy recovery

Bai

2015

Journal of Natural Gas Science and Engineering

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Section: Mmentioning

confidence: 99%

“…The thermal properties of water are calculated from the PROPATH software package developed by Kyushu University (Version 13.1) with original data from [17]. The codes for the three working fluids are organized into an iterative process for the one-dimensional heat transfer analysis.…”

Section: Thermal Properties Of the Working Fluidmentioning

confidence: 99%

One-dimensional numerical study of thermal performance of an organic Rankine cycle system using liquefied natural gas as a cold source for cold energy recovery

Bai

2015

Journal of Natural Gas Science and Engineering

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“…In fact, Jung et al (2004) measured condensation HTCs of CFCs, HCFCs, HFCs, and hydrocarbons which can be used in refrigeration and air-conditioning equipment as a pure fluid or as one of the components of mixed refrigerants. Based upon the measured data, Jung et al (2004) increased the constant in Nusselt's correlation by 9.0% to account for the turbulent flow and suggested the following correlation for design engineers.…”

Section: Comparison With Correlationsmentioning

confidence: 99%

“…Recently, and Hwang et al (1999) measured the external condensation HTCs of CFC11, CFC12, and HCFC22 and their alternatives. Also Jung et al (2004; measured the external condensation HTCs of flammable refrigerants of R1270, R290, R600a, R600, RE170, R32 and their mixtures.…”

Section: Introductionmentioning

confidence: 99%

Condensation heat transfer coefficients of HFC245fa on a horizontal plain tube

2010

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In this study, condensation heat transfer coefficients (HTCs) of HCFC22, HCFC123, HFC134a and HFC245fa are measured on a horizontal plain tube 19.0 mm outside diameter. All data are taken at the vapor temperature of 39 with a wall subcooling temperature 3-8 . Test results show the HTCs of newly developed alternative low vapor pressure refrigerant, HFC245fa, on a smooth tube are 9.5% higher than those of HCFC123 while they are 3.3% and 5.6% lower than those of HFC134a and HCFC22 respectively. Nusselt's prediction equation for a smooth tube underpredicts the measured data by 13.7% for all refrigerants while a modified equation yielded 5.9% deviation against all measured data. From the view point of environmental safety and condensation heat transfer, HFC245fa is a long term good candidate to replace HCFC123 used in centrifugal chillers.

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“…Several different studies can also be found in the literature working with natural hydrocarbons in macro-channels (Gebauer et al, 2013;Jung et al, 2004;Lee and Son, 2010;Lee et al, 2006;Garimella, 2015, 2016;Park et al, 2008;Thonon, 2008a), but only a few experimental studies deal with minichannels Fernando et al, 2008;Maqbool et al, 2013;Wen and Ho, 2009;Wen et al, 2006).…”

Section: Introductionmentioning

confidence: 99%