Model Validation for Flow and Heat Transfer Characteristics of Supercritical CO2 in Mini-Channels

Carbon dioxide (CO2) at supercritical phase is being used recently in Heating, Ventilation, Air Conditioning and Refrigeration (HVAC&R) industries due to its special thermal properties of supercritical CO2, which leads to better performance of heat transfer and flow characteristics. Therefore, t...

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Main Authors: N. T., Rao, A. N., Oumer, Ummu Kulthum, Jamaludin, Hassan, Ibrahim, F., Basrawi, A. Y., Adam
Format: Article
Language:English
English
Published: Asian Research Publishing Network (ARPN) 2017
Subjects:
Online Access:http://umpir.ump.edu.my/id/eprint/13795/1/fkm-2016-rao-Model%20Validation%20for%20Flow%20and%20Heat%20Transfer%20Characteristics.pdf
http://umpir.ump.edu.my/id/eprint/13795/13/fkm-2017-oumer-Model%20Validation%20for%20Flow%20and%20Heat%20Transfer.pdf
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author N. T., Rao
A. N., Oumer
Ummu Kulthum, Jamaludin
Hassan, Ibrahim
F., Basrawi
A. Y., Adam
author_facet N. T., Rao
A. N., Oumer
Ummu Kulthum, Jamaludin
Hassan, Ibrahim
F., Basrawi
A. Y., Adam
author_sort N. T., Rao
collection UMP
description Carbon dioxide (CO2) at supercritical phase is being used recently in Heating, Ventilation, Air Conditioning and Refrigeration (HVAC&R) industries due to its special thermal properties of supercritical CO2, which leads to better performance of heat transfer and flow characteristics. Therefore, the main purpose of this study is to develop flow and heat transfer CFD models and validate the models by comparing with previous studies from literature. For the simulation, the CO2 flow was assumed to be incompressible, turbulent, non-isothermal and Newtonian. The numerical results compared with the experimental data obtained from S.M. Liao et. al. [1]. The experimental data consisted of three different cases with different inlet pressure (P), inlet temperature (Tin) and tube diameter (d). All the maximum and minimum temperature percentage differences for all three cases are in a small values. Moreover, the surface area, A of the tube is inversely proportional to heat transfer coefficient (h). Besides, the pressure drop (ΔP) for all three cases increased together with h when the tube diameters decreased. The numerical results were in good agreement with experimental results for temperature distributions. The CFD model is validated.
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spelling UMPir137952018-11-30T01:58:48Z http://umpir.ump.edu.my/id/eprint/13795/ Model Validation for Flow and Heat Transfer Characteristics of Supercritical CO2 in Mini-Channels N. T., Rao A. N., Oumer Ummu Kulthum, Jamaludin Hassan, Ibrahim F., Basrawi A. Y., Adam TJ Mechanical engineering and machinery Carbon dioxide (CO2) at supercritical phase is being used recently in Heating, Ventilation, Air Conditioning and Refrigeration (HVAC&R) industries due to its special thermal properties of supercritical CO2, which leads to better performance of heat transfer and flow characteristics. Therefore, the main purpose of this study is to develop flow and heat transfer CFD models and validate the models by comparing with previous studies from literature. For the simulation, the CO2 flow was assumed to be incompressible, turbulent, non-isothermal and Newtonian. The numerical results compared with the experimental data obtained from S.M. Liao et. al. [1]. The experimental data consisted of three different cases with different inlet pressure (P), inlet temperature (Tin) and tube diameter (d). All the maximum and minimum temperature percentage differences for all three cases are in a small values. Moreover, the surface area, A of the tube is inversely proportional to heat transfer coefficient (h). Besides, the pressure drop (ΔP) for all three cases increased together with h when the tube diameters decreased. The numerical results were in good agreement with experimental results for temperature distributions. The CFD model is validated. Asian Research Publishing Network (ARPN) 2017 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/13795/1/fkm-2016-rao-Model%20Validation%20for%20Flow%20and%20Heat%20Transfer%20Characteristics.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/13795/13/fkm-2017-oumer-Model%20Validation%20for%20Flow%20and%20Heat%20Transfer.pdf N. T., Rao and A. N., Oumer and Ummu Kulthum, Jamaludin and Hassan, Ibrahim and F., Basrawi and A. Y., Adam (2017) Model Validation for Flow and Heat Transfer Characteristics of Supercritical CO2 in Mini-Channels. ARPN Journal of Engineering and Applied Sciences, 12 (14). pp. 4312-4317. ISSN 1819-6608. (Published) http://www.arpnjournals.org/jeas/research_papers/rp_2017/jeas_0717_6211.pdf
spellingShingle TJ Mechanical engineering and machinery
N. T., Rao
A. N., Oumer
Ummu Kulthum, Jamaludin
Hassan, Ibrahim
F., Basrawi
A. Y., Adam
Model Validation for Flow and Heat Transfer Characteristics of Supercritical CO2 in Mini-Channels
title Model Validation for Flow and Heat Transfer Characteristics of Supercritical CO2 in Mini-Channels
title_full Model Validation for Flow and Heat Transfer Characteristics of Supercritical CO2 in Mini-Channels
title_fullStr Model Validation for Flow and Heat Transfer Characteristics of Supercritical CO2 in Mini-Channels
title_full_unstemmed Model Validation for Flow and Heat Transfer Characteristics of Supercritical CO2 in Mini-Channels
title_short Model Validation for Flow and Heat Transfer Characteristics of Supercritical CO2 in Mini-Channels
title_sort model validation for flow and heat transfer characteristics of supercritical co2 in mini channels
topic TJ Mechanical engineering and machinery
url http://umpir.ump.edu.my/id/eprint/13795/1/fkm-2016-rao-Model%20Validation%20for%20Flow%20and%20Heat%20Transfer%20Characteristics.pdf
http://umpir.ump.edu.my/id/eprint/13795/13/fkm-2017-oumer-Model%20Validation%20for%20Flow%20and%20Heat%20Transfer.pdf
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