Modified Wilson Plots for Enhanced Heat Transfer Experiments: Current Status and Future Perspectives

Rooyen, E. van; Christians, Marcel; Thome, John R.

doi:10.1080/01457632.2012.611767

Cited by 20 publications

(3 citation statements)

References 15 publications

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“…The internal HTC, ℎ , was determined through a Briggs and Young-type Wilson plot as implemented by Van Rooyen et al [60]. ℎ was assumed to take the form of the Gnielinski correlation [61], ℎ , with a lead coefficient, , calculated from the Wilson plot to account for the presence of the temperature probe within the tube and correlation error as follows:…”

Section: Data Reductionmentioning

confidence: 99%

Falling film boiling of refrigerants over nanostructured and roughened tubes: Heat transfer, dryout and critical heat flux

Bock

Bucci

Markides

et al. 2020

International Journal of Heat and Mass Transfer

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Section: Data Reductionmentioning

confidence: 99%

Falling film boiling of refrigerants over nanostructured and roughened tubes: Heat transfer, dryout and critical heat flux

Bock

Bucci

Markides

et al. 2020

International Journal of Heat and Mass Transfer

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“…Over the years the Wilson plot method has undergo series of modifications in order to extend its application to more sophisticated heat exchanger design and enhanced flow conditions. More detailed information concerning the application of both the original and modified Wilson plot method in various heat transfer problems can be found in literature [10][11][12][13][14][15] The aim of the paper is to present the available research methods widely applied in the investigations of heat transfer coefficient in minichannels. The main focus was put on thermal balance method and mass transfer method.…”

Section: Introductionmentioning

confidence: 99%

Research methods in the study of heat transfer coefficient during flow in minichannels

Tychanicz-Kwiecień

Grosicki

2021

Journal of Mechanical and Energy Engineering

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The paper presents the specification of research methods commonly encountered in the studies of heat transfer processes in minichannels. In particular the following methods have been emphasized: electrochemical limiting current method as well as the thermal balance method. In thermal balance method the mean heat transfer coefficient is determined by the set of experimental thermal measurements of the investigated heat exchanger. In turn, limiting current method is based on heat and mass transfer analogy. The discussed research methods have been implemented on two specially designed and constructed test facilities with compact minichannel heat exchangers, which have been presented and described in details. In order to validate the designed setup, the preliminary experimental measurements of two minichannel heat exchangers with hydraulic diameter of 2 mm and rectangular cross sections during single-phase liquid flows have been carried out. In further perspective it is planned to extend the experimental studies of minichannel heat exchangers and to compare the results obtained by both methods described.

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“…Heat transfer coefficients during single phase convection inside tubes of the evaporator, α ev,i , and the condenser, α c,i , were determined by applying the Wilson plot technique [25]. The method is simple and has a wide potential for applications of different types of heat exchangers [26][27][28][29][30][31]. The classical Wilson plot method, as well as its modifications, requires only determination of the overall resistance in the heat exchanger and hence an accurate energy balance, based on measurement of flow rates of fluids exchanging heat and their mean temperature at inlet and outlet from heat exchanger.…”

Section: Data Reductionmentioning

confidence: 99%

Effect of nanofluid concentration on two-phase thermosyphon heat exchanger performance

Cieśliński

2016

Archives of Thermodynamics

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An approach -relaying on application of nanofluid as a working fluid, to improve performance of the two-phase thermosyphon heat exchanger (TPTHEx) has been proposed. The prototype heat exchanger consists of two horizontal cylindrical vessels connected by two risers and a downcomer. Tube bundles placed in the lower and upper cylinders work as an evaporator and a condenser, respectively. Distilled water and nanofluid water-Al2O3 solution were used as working fluids. Nanoparticles were tested at the concentration of 0.01% and 0.1% by weight. A modified Peclet equation and Wilson method were used to estimate the overall heat transfer coefficient of the tested TPTHEx. The obtained results indicate better performance of the TPTHEx with nanofluids as working fluid compared to distilled water, independent of nanoparticle concentration tested. However, increase in nanoparticle concentration results in overall heat transfer coefficient decrease of the TPTHEx examined. It has been observed that, independent of nanoparticle concentration tested, decrease in operating pressure results in evaporation heat transfer coefficient increase.

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Modified Wilson Plots for Enhanced Heat Transfer Experiments: Current Status and Future Perspectives

Cited by 20 publications

References 15 publications

Falling film boiling of refrigerants over nanostructured and roughened tubes: Heat transfer, dryout and critical heat flux

Falling film boiling of refrigerants over nanostructured and roughened tubes: Heat transfer, dryout and critical heat flux

Research methods in the study of heat transfer coefficient during flow in minichannels

Effect of nanofluid concentration on two-phase thermosyphon heat exchanger performance

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