Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Record Heat Flux for Flow Boiling with R123 in a single Microchannel
Submission Author:
Thalles Coimbra Borba Roldão , SP , Brazil
Co-Authors:
Thalles Coimbra Borba Roldão , Juliana Silva Brasil, Cristiano Tibiriçá
Presenter: Thalles Coimbra Borba Roldão
doi://10.26678/ABCM.ENCIT2022.CIT22-0036
Abstract
This paper presents new data for flow boiling in microchannels with R123 as the working fluid. A single horizontal tube with an internal diameter of 1.1mm and heated length of 100mm was used. The experiments were conducted with values of mass velocity, between 2000 and 4000 kg/m²s, a range above the data seen in the literature for this fluid, and high heat fluxes, ranging from 394 to 659 kw/m², which is a record value for flow boiling with R123 in a single microchannel. The obtained heat transfer coefficients were up to 31 kw/m²k, which is among the highest values found in the literature for this fluid. Predictive methods to estimate the heat transfer coefficient were tested and mean absolute errors of 11.39% and 19.11% were obtained.
Keywords
Flow boiling, Microchannel, R123
