Pool boiling data and prediction method for enhanced boiling tubes with R-134a, R-236fa and R-1234ze(E)

Rooyen, E. van; Thome, John R.

doi:10.1016/j.ijrefrig.2012.11.023

Cited by 40 publications

(10 citation statements)

References 30 publications

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“…This insensitivity to increasing temperature/pressure for enhanced surfaces was also reported by van Rooyen and Thome [14]. This indicates that the coating itself may limit heat dissipation.…”

Section: Resultssupporting

confidence: 82%

“…Yang et al [13] compared the thermal performance of various commercially available "Turbo" tubes (manufactured by Wolverine Tube, Inc.) in HFC-134a. Similarly, van Rooyen and Thome [14] compared the vapor generation patterns from two commercially available enhanced tubes in HFC-134a, HFC-236fa, and HFC-1234ze(E). Similarly, van Rooyen and Thome [14] compared the vapor generation patterns from two commercially available enhanced tubes in HFC-134a, HFC-236fa, and HFC-1234ze(E).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Pressure and a Microporous Coating on HFC-245fa Pool Boiling Heat Transfer

Moreno

Jeffers

Narumanchi

2014

Journal of Heat Transfer

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A study was conducted to experimentally characterize the pool boiling performance of hydrofluorocarbon HFC-245fa at pressures ranging from 0.15 MPa to 1.1 MPa (reduced pressure range: 0.04-0.31). Pool boiling experiments were conducted using horizontally oriented 1-cm2 heated surfaces to quantify the effects of pressure and a microporousenhanced coating on heat transfer coefficients and critical heat flux (CHF) values. Results showed that the coating enhanced heat transfer coefficients and CHF by 430% and 50%, respectively. The boiling heat transfer peiformance of HFC-245fa was then compared with the boiling performance of HFC-134a and hydrofluoroolefin HFO-1234yf.

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Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Effects of Pressure and a Microporous Coating on HFC-245fa Pool Boiling Heat Transfer

Moreno

Jeffers

Narumanchi

2014

Journal of Heat Transfer

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“…The experimental data have been obtained for seven kinds of fluids (water, ethanol, CCl 4 , acetone, n-hexane, R113, R141b) and for the plain surfaces without capillary structures under variable pressure. These surfaces include ordinary metal, metal with a coating and nonmetals of high thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…van Rooyen and J.R. Thome [4] studied Turbo-B5 and Gewa-B5 enhanced surfaces. The experiment were carried out with used refrigerants R-134a, R-236fa and R-1234ze(E).…”

Section: Introductionmentioning

confidence: 99%

The effect of Bond number on pool boiling for mini-fin surfaces and different working fluids

Strąk

Pastuszko

2016

EPJ Web of Conferences

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Abstract. Experimental nucleate pool boiling data were collected for structures in the form of extended surfaces sintered with perforated foil. The article describes experimental investigations for two kinds of surfaces: smooth and mini-fins with sintered perforated foil (MFP). The MFP surfaces were manufactured out of perforated copper foil (pore diameters: 0.05 -0.3 mm) sintered with the mini-fins, uniformly spaced on the base surface. The experiments were carried out at atmospheric pressure for four kinds of the fluids: water, ethanol, FC-72 and Novec 649. The results for these working fluids were compared in terms of the Bond number and other dimensionless parameters. For all working fluids, the heat transfer coefficients obtained for the MFP surfaces were from 2 to 5 times higher than those for the smooth surface. Using a regression analysis with reference to selected physical properties and several characteristic dimensions, it was possible to develop a correlation for the Nusselt number.

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“…Diani et al [136] tested R1234ze(E) inside a 3.4 mm microfin tube, in this case R1234ze(E) flow boiling HTC was around 9% lower than those obtained with R134a. Van Rooyen and Thome [140] investigated pool boiling data for enhanced boiling tubes and developed a prediction method based on a boiling heat transfer mechanism in the near-wall region. The R1234ze(E) HTC was 11% lower than R134a Wolverine…”

Section: R1234ze(e) Htc Falls More At Low Vapour Qualities Conclusiomentioning

confidence: 99%

Analysis of Low Global Warming Potential Fluoride Working Fluids in Vapour Compression Systems. Experimental Evaluation of Commercial Refrigeration Alternatives.

Babiloni¹

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Pool boiling data and prediction method for enhanced boiling tubes with R-134a, R-236fa and R-1234ze(E)

Cited by 40 publications

References 30 publications

Effects of Pressure and a Microporous Coating on HFC-245fa Pool Boiling Heat Transfer

Effects of Pressure and a Microporous Coating on HFC-245fa Pool Boiling Heat Transfer

The effect of Bond number on pool boiling for mini-fin surfaces and different working fluids

Analysis of Low Global Warming Potential Fluoride Working Fluids in Vapour Compression Systems. Experimental Evaluation of Commercial Refrigeration Alternatives.

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