发布时间：2025-04-30

论文名称：Optimum output temperature setting and an improved bed structure of metal hydride hydrogen storage reactor for thermal energy storage

发表刊物：International Journal of Hydrogen Energy

摘要：As the well-known solid hydrogen storage materials, metal hydrides (MHs) have been
developed systematically for decades. During recent years, due to the development of
thermal energy storage (TES) market, they have also received much attention gradually as
the excellent TES materials because of the high energy density, low cost, and good
reversibility. In this study, the stabilized discharging performance of an MH reactor for TES
was investigated by numerical simulation. A mathematical model combining multiphysics
and proportional-integral controller was established. Based on finite-time thermodynamics,
gravimetric exergy-output rate (GEOR) considering the control requirement,
finite-material, and finite-time constraints was defined. For a given reactor, the output
temperature setting could be optimized based on GEOR. Besides, the effects of the reactor
parameters on the optimum output temperature setting were systematically studied. The
heat transfer analysis indicated the occurrence of the axial non-uniform reaction in the
bed due to the inherent increase in the temperature of heat transfer fluid, resulting in the
decrease of both GEOR and material availability. Accordingly, a new tapered bed structure
(L/Do ¼ 600/50 mm) was proposed to effectively improve the discharging efficiency from 76
to 90% and GEOR from 65 to 120 W kg1, which provides a helpful guidance for the
advanced designing and construction of MH reactor for the practical TES applications.

合写作者：Penghui Feng, Luying Zhu, Yang Zhang, Fusheng Yang, Zhen Wu*, Zaoxiao Zhang*

卷号：43

页面范围：1-13

是否译文：否

发表时间：2018-05-21