Comparison of Individual Air-Side Row-By-Row Heat Transfer Coefficient Correlations on Four-Row Finned-Tube Heat Exchangers

Marcinkowski, M. J.; Taler, Dawid; Taler, Jan; Węglarz, Katarzyna

doi:10.1080/01457632.2022.2113456

Cited by 2 publications

(2 citation statements)

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“…There are well-known commercial computational fluid dynamics (CFD) programs. The most popular are the following: ANSYS CFX/Fluent [7,8] and COMSOL Multiphysics [9]. In [7] the authors have considered four-row finned-tube heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

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Development of FEM Calculation Methods to Analyse Subcooled Boiling Heat Transfer in Minichannels Based on Experimental Results

2022

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Even though two-phase heat transfer of refrigerants in minichannel heat sinks has been studied extensively, there is still a demand for improvements in overall thermal performance of miniature heat transfer exchangers. Experimental investigation and sophisticated heat transfer calculations with respect to heat transfer devices are still needed. In this work, a time-dependent experimental study of subcooled boiling was carried out for FC-72 flow in a heat sink, comprising of five asymmetrically heated minichannels. The heater surface temperature was continuously monitored by an infrared camera. The boiling heat transfer characteristics were investigated and the effect of the mass flow rate on the heat transfer coefficient was studied. In order to solve the heat transfer problem related to time-dependent flow boiling, two numerical methods, based on the FEM were applied, and based on the Trefftz functions (FEMT) and using the ADINA program. The results achieved with these two calculation methods were explored with an emphasis on the impact of the mass flow rate (range from 5 to 55 kg/h) on the resulting heat transfer coefficient. It was found that, with increasing mass flow, the heat transfer coefficient increased. Good agreement was found between the heat transfer coefficients, determined according to two numerical methods and the simple 1D calculation method.

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Section: Introductionmentioning

confidence: 99%

“…The most popular are the following: ANSYS CFX/Fluent [7,8] and COMSOL Multiphysics [9]. In [7] the authors have considered four-row finned-tube heat exchangers. The main result was the proposition of new correlations for the air-side Nusselt number for the four-row finned tube heat exchanger.…”

Section: Introductionmentioning

confidence: 99%