Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 1, Pages 1038-1055Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.09.191
Keywords
Hydrogen storage; Magnesium hydride; Helical coil heat exchanger; Numerical modelling
Categories
Funding
- Australian Research Council (ARC) [LP120101848, LP150100730]
- Department of Industry Innovation and Science [GIL73589]
- ARC [FT160100303]
- Australian Government
- Government of Western Australia
Ask authors/readers for more resources
Metal hydrides are considered important thermal energy storage materials for concentrated solar thermal applications, with thermal performance depending on heat exchange effectiveness. This study, supported by experimental validation, enhances thermal performance of a magnesium hydride reactor with a helical coil heat exchanger. The research identifies that enhancing thermal conductivity in magnesium hydride has an insignificant impact on reactor performance.
Metal hydrides are regarded as one of the most attractive options for thermal energy storage (TES) materials for concentrated solar thermal applications. Improved thermal performance of such systems is vitally determined by the effectiveness of heat exchange between the metal hydride and the heat transfer fluid (HTF). This paper presents a numerical study supported by experimental validation on a magnesium hydride reactor fitted with a helical coil heat exchanger for enhanced thermal performance. The model incorporates hydrogen absorption kinetics of ball-milled magnesium hydride, with titanium boride and expanded natural graphite additives obtained by Sievert's apparatus measurements and considers thermal diffusion within the reactor to the heat transfer fluid for a realistic representation of its operation. A detailed parametric analysis is carried out, and the outcomes are discussed, examining the ramifications of hydrogen supply pressure and its flow rate. The study identifies that the enhancement of thermal conductivity in magnesium hydride has an insignificant impact on current reactor performance. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available