Numerical study of a metal hydride heat transformer for low-grade heat recovery Simulation of a MH heat transformer

Yang, F. S., Zhang, Z. X., Wang, G. X., Bao, Z. W., da Costa, J. C. D. and Rudolph, V. (2011) Numerical study of a metal hydride heat transformer for low-grade heat recovery Simulation of a MH heat transformer. Applied Thermal Engineering, 31 14-15: 2749-2756. doi:10.1016/j.applthermaleng.2011.04.047


Author Yang, F. S.
Zhang, Z. X.
Wang, G. X.
Bao, Z. W.
da Costa, J. C. D.
Rudolph, V.
Title Numerical study of a metal hydride heat transformer for low-grade heat recovery Simulation of a MH heat transformer
Journal name Applied Thermal Engineering   Check publisher's open access policy
ISSN 1359-4311
1873-5606
Publication date 2011-10
Sub-type Article (original research)
DOI 10.1016/j.applthermaleng.2011.04.047
Volume 31
Issue 14-15
Start page 2749
End page 2756
Total pages 8
Place of publication Oxford, United Kingdom
Publisher Pergamon
Collection year 2012
Language eng
Formatted abstract
Due to the increasing demand for clean energy and improved energy utilization, the metal hydride heat transformer for low-grade heat recovery has attracted wide attentions recently. In this paper, such a system with LaNi 5-LaNi4.7Al0.3 pair, which is used for upgrading waste heat to a higher temperature, was investigated in detail by numerical simulation. Different from existing studies, in this investigation only ambient and waste heat sources are involved during operation of the heat transformer, which could be advantageous in many aspects. A rigorous 2-D unsteady model was developed and numerically solved by the fully implicit finite volume method (FVM). It was shown that the proposed system can achieve steady heat upgrading operation, resulting in an average temperature boost of 6.8 K using a 358 K waste heat source. The dynamic behavior of the heat transformer in three subsequent cycles was analyzed, and the measures aiming at continuous output were further discussed.
Keyword Metal hydride
Waste heat recovery
Numerical simulation
Specific heating power
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2012 Collection
 
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