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Heat transfer characteristics of plug-in oscillating heat pipe with binary-fluid mixtures for electric vehicle battery thermal management.
- Source :
-
International Journal of Heat & Mass Transfer . Jun2019, Vol. 135, p746-760. 15p. - Publication Year :
- 2019
-
Abstract
- Highlights • A plug-in OHP with flat-plate evaporator and tube condenser was developed. • Excellent heat transfer performance of plug-in OHP was achieved using ethanol-water mixtures. • EV battery temperature could be well-controlled below 46.5 °C based on the plug-in OHP. Abstract The development of highly-efficient, cost-effective, and reliable cooling schemes of electric vehicle (EV) battery is still a big challenge for massive commercialization of EVs. In this work, a proof-of-concept plug-in oscillating heat pipe (OHP) with flat-plate evaporator and tube condenser has been developed and experimentally tested for the potential applications in EV battery thermal management. Pure water, ethanol, and binary-fluid mixtures of them at different mixing ratios (MRs) ranging from 1:1 to 4:1 were used at volumetric filling ratios (FRs) of 30%, 40% and 50%. Owing to the zeotropic properties in phase transition and the complex molecular interactions between the ethanol component and water component, the OHP charged with ethanol-water mixtures exhibited better start-up and heat transfer performance. The average battery pack temperature could be controlled below 46.5 °C under the power input of 56 W. Besides, well-satisfied temperature uniformity was achieved on the battery module and the maximum temperature differences were mostly in the range of 1–2 °C. The complementary features for ethanol-water mixture thermo-physical properties and temperature/concentration gradients induced mass transport account for the OHP performance improvement. The novel plug-in OHP associated with desirable heat transfer performance provides a promising candidate for battery thermal management system. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00179310
- Volume :
- 135
- Database :
- Academic Search Index
- Journal :
- International Journal of Heat & Mass Transfer
- Publication Type :
- Academic Journal
- Accession number :
- 135626022
- Full Text :
- https://doi.org/10.1016/j.ijheatmasstransfer.2019.02.021