LAPSE:2018.0579
Published Article
LAPSE:2018.0579
Heat Transfer Coefficient Identification in Mini-Channel Flow Boiling with the Hybrid Picard⁻Trefftz Method
September 21, 2018
This paper summarizes the results of the flow boiling heat transfer study with ethanol in a 1.8 mm deep and 2.0 mm wide horizontal, asymmetrically heated, rectangular mini-channel. The test section with the mini-channel was the main part of the experimental stand. One side of the mini-channel was closed with a transparent sight window allowing for the observation of two-phase flow structures with the use of a fast film camera. The other side of the channel was the foil insulated heater. The infrared camera recorded the 2D temperature distribution of the foil. The 2D temperature distributions in the elements of the test section with two-phase flow boiling were determined using (1) the Trefftz method and (2) the hybrid Picard⁻Trefftz method. These methods solved the triple inverse heat conduction problem in three consecutive elements of the test section, each with different physical properties. The values of the local heat transfer coefficients calculated on the basis of the Robin boundary condition were compared with the coefficients determined with the simplified approach, where the arrangement of elements in the test section was treated as a system of planar layers.
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Keywords
heat transfer coefficient, hybrid Picard–Trefftz method, inverse heat conduction problem, mini-channel flow boiling
Subject
Suggested Citation
Grabowski M, Hożejowska S, Pawińska A, Poniewski ME, Wernik J. Heat Transfer Coefficient Identification in Mini-Channel Flow Boiling with the Hybrid Picard⁻Trefftz Method. (2018). LAPSE:2018.0579
Author Affiliations
Grabowski M: Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Płock, Poland
Hożejowska S: Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland
Pawińska A: Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland
Poniewski ME: Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Płock, Poland
Wernik J: Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Płock, Poland [ORCID]
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Hożejowska S: Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland
Pawińska A: Faculty of Management and Computer Modelling, Kielce University of Technology, 25-314 Kielce, Poland
Poniewski ME: Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Płock, Poland
Wernik J: Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Płock, Poland [ORCID]
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Journal Name
Energies
Volume
11
Issue
8
Article Number
E2057
Year
2018
Publication Date
2018-08-08
Published Version
ISSN
1996-1073
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Original Submission
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PII: en11082057, Publication Type: Journal Article
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LAPSE:2018.0579
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doi:10.3390/en11082057
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[v1] (Original Submission)
Sep 21, 2018
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Sep 21, 2018
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https://psecommunity.org/LAPSE:2018.0579
Original Submitter
Calvin Tsay
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