Hydride alloys properties investigations for hydrogen sorption compressor

Dehouche, Zahir; Grimard, N.; Laurencelle, F.; Goyette, J.; Bose, T. K.

doi:10.1016/j.jallcom.2005.01.029

Cited by 73 publications

(40 citation statements)

References 6 publications

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“…Dehouche et al [49] have presented experimental results which show the effect of hysteresis in different AB 5 materials. In Table 4, the absorption and desorption pressures are compared, and the corresponding enthalpy loss ΓG hys has been calculated.…”

Section: Hysteresismentioning

confidence: 99%

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Modelling and analysis of a metal hydride cooling system

Herrero¹

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The work which is presented by J. Payá Herrero, titled "Modelling and analysis of a metal hydride cooling system" has been carried out at the Institute for Energy Engineering under my supervision and assessment.As the modelling and experimental objectives have been reached, I authorise the submission of this PhD work for its evaluation by the corresponding examination board. This PhD thesis consists in the modelling and validation of a metal hydride cooling system. The experimental prototype is located in the institute IKE.In the first place, the hydrogen absorbing materials have been characterized in terms of the static P-C-T properties and of the intrinsic reaction kinetics. In the second place, after this first characterization phase, a completely dynamic model has been developed based on the heat and mass transfer processes which take place in the reactors. The results have been validated with an exhaustive experimental campaign of dynamic cooling tests and the adjustment of the model is very good.Finally, the cooling performance of the system has been improved by means of the model which has enabled the optimization of the operating conditions and of the sorption materials. El presente estudio consiste en el modelado y validación de un sistema de producción de frío basado en la absorción/desorción de hidrógeno en metales.La instalación experimental que se ha modelado se halla en el instituto IKE.En primer lugar, los materiales utilizados se han caracterizado tanto desde el punto de vista de las curvas P-C-T de equilibrio como de la cinética de absorción/desorción de cada aleación. En segundo lugar, se ha desarrollado un modelo completamente dinámico basado en las reacciones de transferencia de calor y masa que ocurren en los reactores. Los resultados se han validado con una amplia gama de medidas de IKE en régimen transitorio, obteniendo un ajuste muy bueno para diferentes ensayos.Finalmente, mediante la utilización del modelo, se han optimizado las condiciones de operación y las propiedades de los materiales, alcanzando así mejores prestaciones en refrigeración.

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Section: Hysteresismentioning

confidence: 99%

“…Dehouche et al [49] recently carried out measurements to evaluate the specific heat of AB 5 alloys using a differential scanning calorimeter (DSC) apparatus.…”

Section: Specific Heatmentioning

confidence: 99%

Modelling and analysis of a metal hydride cooling system

Herrero¹

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“…The method was developed using metals such as gallium and indium as the melting reference material and has since been applied to a number of other materials. [8][9][10][11] 035011-3 Allan, Pinder, and Dehouche AIP Advances 6, 035011 (2016)…”

Section: Measuring Thermal Conductivitymentioning

confidence: 99%

Enhancing the thermal conductivity of ethylene-vinyl acetate (EVA) in a photovoltaic thermal collector

2016

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Samples of Ethylene-Vinyl Acetate (EVA) were doped with particles of Boron Nitride (BN) in concentrations ranging from 0-60% w/w. Thermal conductivity was measured using a Differential Scanning Calorimetery (DSC) technique. The thermal conductivity of parent EVA was increased from 0.24W/m ⋅ K to 0.80W/m ⋅ K for the 60% w/w sample. Two PV laminates were made; one using the parent EVA the other using EVA doped with 50% BN. When exposed to a one directional heat flux the doped laminate was, on average, 6% cooler than the standard laminate. A finite difference model had good agreement with experimental results and showed that the use of 60% BN composite achieved a PV performance increase of 0.3% compared to the standard laminate.

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“…6), from ERG Materials and Aerospace, is press-fitted inside the reservoir. It occupies 10% of the internal volume (porosity = 0.9) and it increases the thermal conductivity of the hydride powder medium to approximately 8 Wm −1 K −1 [15,16], instead of under 0.2 Wm −1 K −1 [17] without a heat transfer matrix. The effectiveness of such foams is compared to other heat transfer matrices in [9].…”

Section: Design Of the Reservoirsmentioning

confidence: 99%