Various thermal management methods are widely adopted in the metal hydride (MH) system to release the thermal effect and obtain acceptable hydrogen storage performance. In this work, an axisymmetric numerical model for a simple MH system without a heat exchanger (HE) has been established and validated to study the system performance during dehydriding. Then the coiled-tube heat exchanger (CTHE) and the phase change material heat exchanger (PCMHE) are used in the hydrogen storage system to improve heat transfer and release negative thermal effect, respectively. The performance of the MH-CTHE system and the MH-PCMHE has been estimated in the dehydriding process. CTHE shows more obvious impact than that of PCMHE. Effects of three common operation parameters on the hydrogen storage capacity of the MH-CTHE system have been investigated. The research results show that the influences of the heating water temperature and the outlet pressure on the system performance are more prominent than that of the heat transfer coefficient. In addition, the relationship between the average dehydriding rate of the MH-CHTE system and the two main operation parameters has been fitted as a simple equation, which can be used to predict and control the dehydriding rate based on given operation conditions.

金属氢化物（MH）系统中广泛采用各种热管理方法来释放热效应并获得可接受的储氢性能。在这项工作中，已经建立并验证了没有热交换器 (HE) 的简单 MH 系统的轴对称数值模型，以研究脱水过程中的系统性能。然后在储氢系统中分别使用连续管换热器（CTHE）和相变材料换热器（PCMHE）来改善传热和释放负面热效应。MH-CTHE 系统和 MH-PCMHE 的性能已经在脱水过程中进行了评估。CTHE比PCMHE显示出更明显的影响。研究了三种常见操作参数对 MH-CTHE 系统储氢能力的影响。研究结果表明，供暖水温和出口压力对系统性能的影响比传热系数更显着。此外，MH-CHTE系统的平均脱氢率与两个主要运行参数之间的关系已拟合为一个简单的方程，可用于根据给定的运行条件预测和控制脱氢率。