Open Access

ARTICLE

Assessment of the Application of Subcooled Fluid Boiling to Diesel Engines for Heat Transfer Enhancement

Xiaoyu Hu, Yi Wang, Siyuan Li, Qiang Sun, Shuzhan Bai, Guoxiang Li^*, Ke Sun^*

School of Energy and Power Engineering, Shandong University, Jinan, 250061, China

* Corresponding Authors: Guoxiang Li. Email: ; Ke Sun. Email:

(This article belongs to the Special Issue: Recent Advances in Fluid Mechanics and Thermal Sciences)

Fluid Dynamics & Materials Processing 2021, 17(6), 1049-1066. https://doi.org/10.32604/fdmp.2021.016763

Received 24 March 2021; Accepted 08 June 2021; Issue published 08 September 2021

Abstract

The increasing demand of cooling in internal combustion engines (ICE) due to engine downsizing may require a shift in the heat removal method from the traditional single phase liquid convection to the application of new technologies based on subcooled fluid boiling. Accordingly, in the present study, experiments based on subcooled flow boiling of 50/50 by volume mixture of ethylene glycol and water coolant (EG/W) in a rectangular channel heated by a cast iron block are presented. Different degrees of subcooling, velocity and pressure conditions are examined. Comparison of three empirical reference models shows that noticeable deviations occur especially when low bulk subcooling and velocity conditions are considered. On the basis of the experimental data, a modified power-type wall heat flux model is developed and its ability to represent adequately reality is tested through numerical simulations against a reference rig case and a practical diesel engine. Computational results show that this modified model can effectively be used for practical engine cooling system design.

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