Prediction of Metal Hydride Heat Transformer Performance Based on Heat Transfer and Reaction Kinetics

Gopal, M.; Murthy, S. Srinivasa

doi:10.1021/ie00046a012

Cited by 20 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several researchers have carried out their studies for the selection of best metal hydride pair for the optimum working of MHHT. Balakumar et al performed thermodynamic analyses of metal hydride based heat pumps and heat transformers using different alloy pairs to facilitate the selection of pairs for particular application.…”

Section: Introductionmentioning

confidence: 99%

“…The study presents a method for selection of suitable alloys for two stage MHHT using following criteria: COP, alloy output, and temperature output. Ram Gopal and Srinivasa Murthy predicted the performance of the MHHT based on heat transfer and reaction kinetics employing ZrCrFe 1.4 /LaNi 5 pair. Results showed that the performance of the system initially depends on heat transfer and eventually, as overall heat transfer coefficient exceeds a certain value, system performance dependence shifts to reaction kinetics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance investigation of metal hydride based heat transformer

et al. 2019

View full text Add to dashboard Cite

Energy is one of the major inputs for the economic development of any country. However, for developing countries energy is essential for economic growth, which calls for the development of clean and sustainable energy source/carrier. Among all the possible options, hydrogen has been considered as a promising clean energy carrier, which is associated with major challenges of its storage and application. Hydrogen can be stored safely in the form of metal hydrides whose formation and decomposition involve high heat interaction, which can be used for the development of thermodynamic systems like sorption heat pumps, which can transform waste heat to useful high‐grade heat. In the present work, the performance of metal hydride based heat transformer (MHHT) is investigated in terms of variation in MH bed temperature and hydrogen interaction between coupled reactors during hydrogen transfer processes, in addition to thermodynamic performance (ie, Coefficient of Performance (COP), heating capacity, and so on) for the operating temperature of TL = 303 K, TM = 383 K, and TH = 423 K. A pair of La0.9Ce0.1Ni5 and LaNi4.6Al0.4 is chosen for present study based on author's previous work. In the present study, user‐defined functions are employed in ANSYS Fluent, which consist of pressure, mass, and energy variation equations. The results are derived in the form of contours and graphical representations of variations in bed temperature and hydrogen concentration. It is observed that the system produces 40 kJ of upgraded heat with heating capacity of 0.1 kW and COP of 0.46 at 880 seconds of hydrogen transfer time for 250 g of each alloys.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%