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Comparative Performance of Ethylene Glycol/Water and Propylene Glycol/Water Coolants in the Convective and Forced Flow Boiling Regimes
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1995 by SAE International in United States
Annotation ability available
Event: International Off-Highway & Powerplant Congress & Exposition International Congress & Exposition
The performance of 50/50 (vol) propylene glycol/water and ethylene glycol/water mixtures in the convective and forced flow boiling regimes has been evaluated and compared with water and previously published data for ethylene glycol/water mixtures. The fluid velocities examined ranged from 0.1 to 0.5 m/s at heat fluxes between 50,000 and 750,000 W/m2.
The results indicate that the heat transfer of 50/50 (vol) propylene glycol/water coolants is slightly less effective in the convective regime compared to 50/50 (vol) ethylene glycol/water mixtures, but superior once nucleate boiling is the dominant mechanism. The experimental data showed good agreement with the predictions of the Chen correlation for boiling heat transfer to saturated fluids in convective flow.
It is concluded that a 50/50 (vol) propylene glycol/water mixture will be at least as effective in providing cooling within an automobile engine as a 50/50 (vol) ethylene glycol/water mixture. In regions of high heat flux the use of a propylene glycol mixture should result in slightly lower maximum metal temperatures.
CitationGollin, M., McAssey, E., and Stinson, C., "Comparative Performance of Ethylene Glycol/Water and Propylene Glycol/Water Coolants in the Convective and Forced Flow Boiling Regimes," SAE Technical Paper 950464, 1995, https://doi.org/10.4271/950464.
- Finlay I.C. et al. “Nucleate and Film Boiling of Engine Coolants Flowing in a Uniformly Heated Duct of Small Cross Section” SAE Paper 870032 Warrendale, Pa. Society of Automotive Engineers 1987
- Chen J.C. “A Correlation for Boiling Heat Transfer to Saturated Fluids in Convective Flow” Ind. and Eng. Chem. -Process Design and Development. 1966 5 3 322 329
- Collier J.G. Forced Convective Boiling “Two Phase Flow and Heat Transfer” Bergles A.E. Collier J.G. Delhaye J.M. Hewitt G.F. Mayinger F. 247 248 Hemisphere, Washington 1981