TY - JOUR
T1 - Performance analysis of metal hydride heat pump system with CFD modelling development and actual reactor designs
AU - Zhang, Xinyu
AU - Ge, Yunting
PY - 2024/11
Y1 - 2024/11
N2 - Hydrogen and metal hydride reactions in a decarbonized heat pump system with low-grade waste heat recovery offer a promising path for sustainable energy storage and conversion. Based on actual metal hydride reactor designs, this study developed a 2D transient Computational Fluid Dynamics (CFD) model for such a heat pump system working with hydrogen and a metal hydride alloy pair of Zr0.9Ti0.1Cr0.6Fe1.4 and LaNi4.25Al0.75. The effects of operating temperatures on the coefficient of performance (COP) and specific heat power (SHP) of the system have been presented and analyzed. Subsequently, raising the medium-temperature heat sink (TM) from 358.15 K to 373.15 K, and low-temperature heat source (TL) from 308.15 K to 323.15 K, results in a decrease in the COP by 25.57%, and an increase in the COP by 38.2%, respectively. An optimum value of high-temperature heat source (TH) exists at 493.15 K for a maximum COP. In addition, the higher thermal conductivity increases the absorption and desorption capacity of hydrogen.
AB - Hydrogen and metal hydride reactions in a decarbonized heat pump system with low-grade waste heat recovery offer a promising path for sustainable energy storage and conversion. Based on actual metal hydride reactor designs, this study developed a 2D transient Computational Fluid Dynamics (CFD) model for such a heat pump system working with hydrogen and a metal hydride alloy pair of Zr0.9Ti0.1Cr0.6Fe1.4 and LaNi4.25Al0.75. The effects of operating temperatures on the coefficient of performance (COP) and specific heat power (SHP) of the system have been presented and analyzed. Subsequently, raising the medium-temperature heat sink (TM) from 358.15 K to 373.15 K, and low-temperature heat source (TL) from 308.15 K to 323.15 K, results in a decrease in the COP by 25.57%, and an increase in the COP by 38.2%, respectively. An optimum value of high-temperature heat source (TH) exists at 493.15 K for a maximum COP. In addition, the higher thermal conductivity increases the absorption and desorption capacity of hydrogen.
UR - https://www.sciencedirect.com/science/article/pii/S0360319924048869
U2 - 10.1016/j.ijhydene.2024.11.204
DO - 10.1016/j.ijhydene.2024.11.204
M3 - Article
SN - 0360-3199
VL - 94
SP - 1146
EP - 1159
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
ER -