Abstract
A study was conducted to experimentally characterize the pool boiling performance of hydrofluorocarbon HFC-245fa at pressures ranging from 0.15MPa to 1.1MPa (reduced pressure range: 0.04-0.31). Pool boiling experiments were conducted using horizontally oriented 1-cm2 heated surfaces to quantify the effects of pressure and a microporous-enhanced coating on heat transfer coefficients and critical heat flux (CHF) values. Results showed that the coating enhanced heat transfer coefficients and CHF by 430% and 50%, respectively. The boiling heat transfer performance of HFC-245fa was then compared with the boiling performance of HFC-134a and hydrofluoroolefin HFO-1234yf.
Original language | American English |
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Article number | 101502 |
Number of pages | 9 |
Journal | Journal of Heat Transfer |
Volume | 136 |
Issue number | 10 |
DOIs | |
State | Published - Oct 2014 |
NREL Publication Number
- NREL/JA-5400-62161
Keywords
- Boiling heat transfer
- Critical heat flux
- HFC-245fa
- Microporous coating