 An overview for the heat transfer performance of HFO-1234yfChi-Chuan Wang Renewable and Sustainable Energy Reviews, 2013, vol. 19, issue C, 444-453 Abstract: This study provides an overview about the two-phase heat transfer performance for HFO-1234yf which is made to substitute R-134a. Based on the limited information, it is found that the nucleate boiling heat transfer coefficient (HTC) and convective boiling HTC for HFO-1234yf are comparable to R-134a provided q<200kWm−2. The critical heat flux for HFO-1234yf is about 20–40% lower than that of R-134a. For external condensation, the only database shows that the HTC between HFO-1234yf and R-134a is also negligible. However, it is found that the major thermophysical properties influencing condensing HTC suggest a lower HTC of HFO-1234yf. For in-tube condensation, it is found that the condensation HTCs for HFO-1234yf are inferior to those of R-134a, and the difference increases with the rise of vapor quality. The predictive correlations applicable for pressured drop for HFO-1234yf are not consistent, it is probably attributed to the difference in tube diameter in the publications. Keywords: HFO-1234yf; R-134a; Two-phase heat transfer coefficient; Pressure drop; Flow pattern (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:rensus:v:19:y:2013:i:c:p:444-453 Ordering information: This journal article can be ordered from DOI: 10.1016/j.rser.2012.11.049 Access Statistics for this article Renewable and Sustainable Energy Reviews is currently edited by L. Kazmerski More articles in Renewable and Sustainable Energy Reviews from Elsevier |
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