A new approach for predicting the pool boiling heat transfer coefficient of refrigerant R141b and its mixtures with surfactant and nanoparticles using experimental data

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F20%3A00541370" target="_blank" >RIV/61388998:_____/20:00541370 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007%2Fs10973-020-09479-0" target="_blank" >https://link.springer.com/article/10.1007%2Fs10973-020-09479-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-020-09479-0" target="_blank" >10.1007/s10973-020-09479-0</a>

Result language

angličtina

Original language name

A new approach for predicting the pool boiling heat transfer coefficient of refrigerant R141b and its mixtures with surfactant and nanoparticles using experimental data

Original language description

In the present study, the pool boiling process for the refrigerant R141b and its mixtures with Span 80 surfactant and TiO2 nanoparticles has been examined. The results for the heat transfer coefficient (HTC) were taken at various boiling pressures (0.2, 0.3, 0.4 MPa) in the range of the heat fluxes 5.8-56.4 kW m(-2) and for the internal boiling characteristics (IBC) such as the bubble departure diameter, frequency and velocity of bubble growth at atmospheric pressure in the range of the heat fluxes 29.6-57.0 kW m(-2). We found that the additives of Span 80 and Span 80/TiO2 nanoparticles enhance the HTC at the lower heat flux densities and pressures. However, at higher values of the heat flux and pressure the HTC was deteriorated by the additives. At the same time, no significant impact was obtained for the IBCs. An analysis of the Rensselaer Polytechnic Institute model performance for the case when experimental data on the nucleation sites density is unavailable has revealed no qualitative agreement between experimental and predicted data on the HTC. Thus, we proposed a new approach that combines limited set of the experimental data (LSED) with correlations of the IBC's versus heat flux and pressure. Finally, the LSED allowed to achieve both qualitative and quantitative agreement (within +/- 10%) between predicted and experimental data on the HTC.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Thermal Analysis and Calorimetry

ISSN

1388-6150

e-ISSN

—

Volume of the periodical

142

Issue of the periodical within the volume

6

Country of publishing house

HU - HUNGARY

Number of pages

13

Pages from-to

2327-2339

UT code for WoS article

000518344400005

EID of the result in the Scopus database

2-s2.0-85081674150