Subcooled Flow Boiling Heat Transfer to Water and Ethylene Glycol/Water Mixtures in a Bottom-heated Tube

Abstract

Subcooled flow boiling heat transfer experiments were performed with water and ethylene glycol/water mixtures at five flow velocities and four fluid inlet temperatures. Both turbulent flow and laminar flow were tested in a special test facility with its experimental test section heated from the bottom surface only. Boiling curves and subcooled flow boiling heat transfer coefficients of the tested fluids were determined from the experimental measurements. Predictive correlations of the subcooled flow boiling heat transfer coefficients were developed based on the experimental data. Comparisons are presented of wall temperatures between the experimental measurements and the correlation predictions.

Keywords::

• ethylene glycol/water mixture
• subcooled flow boiling
• boiling curve
• boiling heat transfer coefficient
• one-side heated tube

Acknowledgments

The authors are grateful for helpful insights from Lee Slezak of the U.S. Department of Energy.