Performance analysis of metal hydride based simultaneous cooling and heat transformation system. (23rd April 2019)

• Record Type: Journal Article
• Authors: Mohan, Man; Sharma, Maitray; Sharma, Vinod Kumar; Kumar, E. Anil; Satheesh, A.; Muthukumar, P.
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 21(2019)
• Page Start: 10906
• Page End: 10915
• Publication Date: 2019-04-23
• Subjects: Metal hydrides -- Metal hydride based simultaneous cooling and heat transformation system -- Static and dynamic thermodynamic data -- Finite volume method -- Thermal modelling; COP Coefficient of Performance -- HT High temperature -- LT Low temperature -- MH Metal hydride -- MHCHT Metal hydride based simultaneous cooling and heat transformation system -- MT Medium temperature -- PCI Pressure-Concentration-Isotherm; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.02.241
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The performance of metal hydrides based simultaneous cooling and heat transformation system (MHCHT) using a combination of La0.9 Ce0.1 Ni5 –MmNi4.4 Al0.6 –MmNi3.7 Co0.7 Mn0.3 Al0.3 hydrides is evaluated. The MHCHT is thermodynamically analysed using statically and dynamically measured PCIs and thermodynamic properties. In addition, a set of governing equations is solved in order to study the heat and hydrogen transfer between the reaction beds. The experimental PCI measurement data are compared with the numerical results and a reasonably good agreement is observed between them. From the results, the slope and hysteresis factors are determined for further thermal analyses. It is observed that the performance parameters i.e. cooling capacity, heat transformation capacity and coefficient of performance (COP) of MHCHT are significantly decreased by 42.4%, 26.7% and 19.1% respectively when dynamic property data are considered compared to static property data. In addition, the thermodynamic cycle is analysed by considering the variation in pressure during hydrogen transfer process between the metal hydride beds. Highlights: La0.9 Ce0.1 Ni5 –MmNi4.4 Al0.6 –MmNi3.7 Co0.7 Mn0.3 Al0.3 hydrides pair is used for MHCHT development. Static and dynamic PCT data are used for thermodynamic analysis of MHCHT. Thermodynamic cycle is constructed using actual pressure variation in MH beds. System performance is predicted using set of governing equations. Average bed temperature, heat transfer and cycle time are predicted.