Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
New correlations of flow boiling heat transfer coefficients based on R1234yf data
Submission Author:
Fernando Neves Quintino dos Santos , SP , Brazil
Co-Authors:
Fernando Neves Quintino dos Santos, Matheus Barroso, Juan Jose Garcia Pabon, Hélio Augusto Goulart Diniz, Paulo Eduardo Lopes Barbieri
Presenter: Fernando Neves Quintino dos Santos
doi://10.26678/ABCM.COBEM2017.COB17-1793
Abstract
R1234yf is a fluid with low GWP and the principal substitute for R134a in automotive applications. Among several studies of this fluid, boiling heat transfer in mini-channels needs special attention due to its importance and scarcity of data. The purpose of this research is to compile pre dry-out R1234yf horizontal flow boiling heat transfer coefficient data available in the open literature, and propose two correlations based on established models. An optimization routine that minimized the sum of squared errors provided the empirical constants for a database comprised of 835 experimental results from five independent sources. Results showed that the new correlations performed better than their counter-parts. A parametric analysis of the correlations on the different sources pointed out that four of the five studies are in good agreement; however, one of them has a different behavior, for unclear reasons.
Keywords
R1234yf, Boiling Heat Transfer, mini channel, Two-phase Flow
