Measurement and the improvement of effective thermal conductivity for a metal hydride bed – a review

Ye, Jianhua; Li, Zhinian; Zhang, Liyu; Wang, Shumao; Jiang, Lijun

doi:10.1039/d2ra04627j

Cited by 6 publications

(2 citation statements)

References 118 publications

(246 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The higher average COF value of hydrogen-charged AISI 316H material might be ascribed to the slight local overheating of its tribological surface due to decreased thermal conductivity by the presence of hydrogen. Indeed, it has been reported that for pure metals and alloys, thermal conductivity is reduced due to the insertion of hydrogen atoms, which hinders the thermal conduction of free electrons [59]. Such behavior was also confirmed by Luo et al [60] in their first-principles study dealing with the effect of interstitial hydrogen on the mechanical and thermal properties of tungsten.…”

Section: Effect Of Hydrogen Charging On Tribological Behaviormentioning

confidence: 71%

The Effects of Electrochemical Hydrogen Charging on Charpy Impact Toughness and Dry Sliding Tribological Behavior of AISI 316H Stainless Steel

et al. 2023

View full text Add to dashboard Cite

In this work, solution-annealed AISI 316H grade austenitic stainless steel was studied in terms of investigating the electrolytic hydrogen charging effects on the resulting Charpy impact toughness and dry sliding tribological behavior. Conventional Charpy impact bending tests were employed to study the mechanical response of the investigated material to dynamic loading conditions, whereas dry linear sliding tribological tests were used to study material friction and wear behavior. The obtained mechanical and tribological properties were correlated with corresponding fracture and tribological mechanisms, which were determined from morphological observations of fracture surfaces and tribological tracks. The applied testing procedures were individually carried out for the non-hydrogenated, hydrogen-charged, and dehydrogenated material conditions. The observed changes in individual properties due to applied hydrogen charging were rather small, which indicated the good resistance of solution-annealed AISI 316H steel against material degradation in currently used electrolytic hydrogenation conditions.

show abstract

Section: Effect Of Hydrogen Charging On Tribological Behaviormentioning

confidence: 71%

The Effects of Electrochemical Hydrogen Charging on Charpy Impact Toughness and Dry Sliding Tribological Behavior of AISI 316H Stainless Steel

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Enhancing kMH it is indeed possible to guarantee higher pdes thus reducing energy/OPEX spent at this purpose. To enhance MH thermal conductivity different techniques could be pursued: using metallic foams and alloys coupled with MH, reducing MH powder porosity via thermal cycles, create MH alloys with high thermal conductivity metals [25], [26]. Nevertheless, usually, an increase of kMH entails a reduction in the gravimetric/volumetric capacity of metal hydrides.…”

Section: Auxiliary Compressor Weekly Energy Consumptionmentioning

confidence: 99%

Thermal Energy Storage technologies for the optimal management of metal hydride hydrogen storage systems

Barberis,

Rivarolo,

Sorce

2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Hydrogen is an excellent energy carrier that could enable the energy transition, however, storing it in a proper and effective way is one of hydrogen key issues. Storing hydrogen via metal hydrides (MH) can be considered a potential solution to avoid problems (safety, pressurization/liquefaction costs) related to conventional storage systems. A thermal energy storage could be coupled to the MH one, to store the heat obtained from the hydrogen absorption reaction and subsequently to release it to start and support the desorption reaction. This technology allows not to use external sources of heat or of compression, guaranteeing significant energy savings. In this work a MH hydrogen storage system (coupled to a 1 MW electrolyser used in an industrial use case) is studied, focusing on its thermal management supported by a Latent Heat Thermal Energy Storage (LTES) via Phase Change Materials (PCM). The study analyses three different metal hydrides, namely LaNi5, TiFe, TiMn1.5, and phase change materials produced by Rubitherm® Technologies GmbH. A model representing a specific electrolyser case study is then built up, enabling the evaluation of the hourly behaviour of the integrated system, the sizing of the thermal energy storage and to conduct a sensitivity analysis towards the identification of most relevant geometry parameters which affect the techno-economic performances of the system, whose are reported in the concluding part of the paper.

show abstract

A Bulk versus Nanoscale Hydrogen Storage Paradox Revealed by Material‐System Co‐Design

Witman,

Brooks,

Sprik

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Metal hydrides are serious contenders for materials‐based hydrogen storage to overcome constraints associated with compressed or liquefied H2. Their ultimate performance is usually evaluated using intrinsic material properties without considering a systems design perspective. An illustrative case with startling implications is (LiNH2+2LiH). Using models that simulate the storage system and associated fuel cell of a light‐duty vehicle (LDV), the performance of the bulk hydrides is compared with a nanoscaled version in porous carbon (PC), (LiNH2+2LiH)@(6‐nm PC). Using experimental material properties, the simulations show that (LiNH2+2LiH)@(6‐nm PC) counterintuitively has higher usable gravimetric and volumetric capacities than the bulk counterpart on a system basis despite having lower capacities on a materials‐only basis. Nanoscaling increases the thermal conductivity and lowers the desorption enthalpy, which consequently increases heat management efficiency. In a simulated drive cycle for fuel cell‐powered LDV, the fuel cell is inoperable using bulk (LiNH2+2LiH) as the storage material but completes the drive cycle using the nanoscale material. These results challenge the notion that nanoscaling incurs mass and volume penalties. Instead, the synergistic nanoporous host‐hydride interaction can favorably modulate chemical and heat transfer properties. Moreover, a co‐design approach considering application‐specific tradeoffs is essential to accurately assess a material's potential for real‐world hydrogen storage.

show abstract

Measurement and the improvement of effective thermal conductivity for a metal hydride bed – a review

Abstract: Solid-state hydrogen storage based on metal hydrides is considered a promising method for hydrogen storage.

Cited by 6 publications

References 118 publications

The Effects of Electrochemical Hydrogen Charging on Charpy Impact Toughness and Dry Sliding Tribological Behavior of AISI 316H Stainless Steel

The Effects of Electrochemical Hydrogen Charging on Charpy Impact Toughness and Dry Sliding Tribological Behavior of AISI 316H Stainless Steel

Thermal Energy Storage technologies for the optimal management of metal hydride hydrogen storage systems

A Bulk versus Nanoscale Hydrogen Storage Paradox Revealed by Material‐System Co‐Design

Contact Info

Product

Resources

About