LAPSE:2021.0149v1
Published Article
LAPSE:2021.0149v1
Condensation Heat Transfer of R-407C in Helical Coiled Tube Heat Exchanger
Hamad Mohammad AlHajeri, Abdulrahman Almutairi, Mohamad Hamad Al-Hajeri, Abdulrahman Alenezi, Rashed ALajmi, Aboelyazeid Mohamed Koluib
March 24, 2021
The results of an experimental study to evaluate the characteristics of R-407C thermofluid during condensation in a helically coiled copper tube heat exchanger are presented. The effects of saturation temperature (Tsat), and mass and heat fluxes of refrigerant R-407C on thermal performance and pressure drop were determined. The relationship between the refrigerant wall subcooling and heat transfer coefficients was also investigated. This paper reports the effect of the temperature of the water used as cooling medium on the heat transfer rate of condensing R-407C. The study was conducted with mass flux of R-407C in the range of 100−450 kg/m2s, mass flux of the coolant water in the range of 500−5000 kg/m2s and Tsat of 31 °C, 35 °C, and 39 °C. Compared with a straight smooth tube, the use of the helical coiled (helicoidal) tube increased the condensation rate with a corresponding pressure drop that depended on the value of Tsat of the refrigerant and temperature of the coolant.
Keywords
condensation, heat transfer, helical tube, R-407C
Subject
Suggested Citation
AlHajeri HM, Almutairi A, Al-Hajeri MH, Alenezi A, ALajmi R, Koluib AM. Condensation Heat Transfer of R-407C in Helical Coiled Tube Heat Exchanger. (2021). LAPSE:2021.0149v1
Author Affiliations
AlHajeri HM: Mechanical Power and Refrigeration Department, College of Technological Studies, Public Authority for Applied Education and Training, Shuwaikh 700030, Kuwait
Almutairi A: Mechanical Power and Refrigeration Department, College of Technological Studies, Public Authority for Applied Education and Training, Shuwaikh 700030, Kuwait
Al-Hajeri MH: Mechanical Power and Refrigeration Department, College of Technological Studies, Public Authority for Applied Education and Training, Shuwaikh 700030, Kuwait
Alenezi A: Mechanical Power and Refrigeration Department, College of Technological Studies, Public Authority for Applied Education and Training, Shuwaikh 700030, Kuwait [ORCID]
ALajmi R: Mechanical Power and Refrigeration Department, College of Technological Studies, Public Authority for Applied Education and Training, Shuwaikh 700030, Kuwait
Koluib AM: Mechanical Power and Refrigeration Department, College of Technological Studies, Public Authority for Applied Education and Training, Shuwaikh 700030, Kuwait
Journal Name
Processes
Volume
8
Issue
9
Article Number
E1157
Year
2020
Publication Date
2020-09-15
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr8091157, Publication Type: Journal Article
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LAPSE:2021.0149v1
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doi:10.3390/pr8091157
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Mar 24, 2021
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CC BY 4.0
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[v1] (Original Submission)
Mar 24, 2021
 
Verified by curator on
Mar 24, 2021
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v1
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https://psecommunity.org/LAPSE:2021.0149v1
 
Original Submitter
Calvin Tsay
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