Evaporation Heat Transfer and Pressure Drop of Low-Global Warming Potential Refrigerant HFO-1234yf in 6.95-mm Horizontal Smooth Tube

Chang-Hyo Son, Nam-Wook Kim, Jung-In Yoon, Sung-Hoon Seol and Joon-Hyuk Lee
Additional contact information
Chang-Hyo Son: Department of Refrigeration and Air-Conditioning Engineering, College of Engineering, PuKyong National University, Busan 48513, Korea
Nam-Wook Kim: R&D Division Institute, LG Electronics Inc., Masan 51722, Korea
Jung-In Yoon: Department of Refrigeration and Air-Conditioning Engineering, College of Engineering, PuKyong National University, Busan 48513, Korea
Sung-Hoon Seol: Department of Refrigeration and Air-Conditioning Engineering, College of Engineering, PuKyong National University, Busan 48513, Korea
Joon-Hyuk Lee: Department of Refrigeration and Air-Conditioning Engineering, College of Engineering, PuKyong National University, Busan 48513, Korea

Energies, 2021, vol. 14, issue 19, 1-18

Abstract: This study investigated the evaporative heat transfer coefficient and pressure drop characteristics of R-1234yf in a horizontal tube with an inner diameter of 6.95 mm under various experimental conditions. The heat transfer coefficient increased with an increase in quality but showed a sharp decrease in the high-quality area. In addition, the heat transfer coefficient increased as the mass flux, heat flux, and saturation temperature increased. Although R-1234yf and R-134a presented similar heat transfer coefficients, that of R-134a was higher. The pressure drop increased with an increase in the quality and mass flux but decreased with an increase in the saturation temperature. The pressure drop of R-134a was larger than that of R-1234yf. In light of the flow pattern diagram by Taitel and Dukler, most of the experiments were included in the annular flow region, and some regions showed intermittent and stratified corrugated flow regions. Kandlikar’s heat transfer coefficient correlation provided the best prediction for the experimental database, with approximately 84% of the predicted data within ±30%. Moreno Quibén and Thome’s equation for pressure drop predicted approximately 88.71% of the data within ±30%.

Keywords: R-123yf; heat transfer; pressure drop; low-GWP; HFOs (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/19/6325/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/19/6325/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:14:y:2021:i:19:p:6325-:d:649492

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().