Heat transfer performance of engine coolants under sub-cooled boiling conditions
- Villanova Univ., PA (United States). Dept. of Mechanical Engineering
- ARCO Chemical Co., Newtown Square, PA (United States)
An experimental program has been conducted to evaluate the heat transfer performance of two engine cooling fluid mixtures, propylene-glycol/water and ethylene-glycol/water. These tests were performed under conditions closely simulating normal engine operation. For both mixtures, results were obtained over a range of heat transfer regimes from single phase convection to saturated flow boiling. Tests showed that propylene-glycol/water and ethylene-glycol/water have very similar heat transfer performances. Performance is defined as the steady state wall temperature maintained for a given surface heat flux and test section inlet velocity. For the lowest velocity tested, the test section experienced saturated boiling over approximately one-half of its heated length. The experimental results were also compared to analytical predictions based upon the Chen correlation. At higher fluxes, the analytical methods under-predicted the test section wall temperature.
- OSTI ID:
- 458384
- Report Number(s):
- CONF-9604188--; ISBN 0-7918-1766-0
- Country of Publication:
- United States
- Language:
- English
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