Static and dynamic measurement-based thermodynamic analysis of solid sorption refrigeration system

Pairs of low-temperature (La0.9Ce0.1Ni5 and La0.8Ce0.2Ni5) and high-temperature (LaNi4.7Al0.3 and LaNi4.6Al0.4) LaNi5 hydrides were used for thermodynamic analysis of metal hydride-based solid sorption refrigeration system (SSRS). In general, static pressure-concentration isotherm (PCI) properties were considered for the thermodynamic analysis of solid sorption thermodynamic cycles. But, the hydrogen transfer processes involved in the thermodynamic cycle are dynamic in nature. Therefore, in the present study, the dynamic PCIs of these metal hydrides were measured at different temperatures and compared with their static PCIs. Significant variation in PCI and thermodynamic properties were observed in dynamic conditions compared with static conditions. Later, the performance of SSRS was determined by using static and dynamic PCI properties. Refrigeration effect and coefficient of performance of SSRS decreased by 60% and 35% respectively, when dynamic (at 80mi/min) PCI data were considered. Copyright (c) 2016 John Wiley & Sons, Ltd.