Handbook of Clean Energy Systems

Rajendran, Keerthi; Ling‐Chin, Janie; Roskilly, Anthony Paul

doi:10.1002/9781118991978

Cited by 65 publications

(9 citation statements)

References 129 publications

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“…Hydrogen has been identified as a promising alternative to fossil fuels due to its potential to be a clean, renewable energy carrier [1,2,3]. However, in its natural state, hydrogen has an unsuitably low volumetric density for automotive applications, leading to much research on more effective hydrogen storage methods [4,5], with clear goals outlined by the Department on Energy (DOE) [6,7]. Borohydrides are a class of complex hydrides which are of interest due to their high gravimetric and volumetric densities, although they typically suffer from hydrogen desorption temperatures over 85 • C, i.e.…”

Section: Introductionmentioning

confidence: 99%

Suppressing diborane production during the hydrogen release of metal borohydrides: The example of alloyed Al(BH 4 ) 3

Harrison

Thonhauser

2016

International Journal of Hydrogen Energy

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Aluminum borohydride (Al(BH 4 ) 3 ) is an example of a promising hydrogen storage material with exceptional hydrogen densities by weight and volume and a low hydrogen desorption temperature. But, unfortunately, its production of diborane (B 2 H 6 ) gases upon heating to release the hydrogen restricts its practical use. To elucidate this issue, we investigate the properties of a number of metal borohydrides with the same problem and find that the electronegativity of the metal cation is not the best descriptor of diborane production. We show that, instead, the closely related formation enthalpy is a better descriptor and we find that diborane production is an exponential function thereof. We conclude that diborane production is sufficiently suppressed for formation enthalpies of −80 kJ/mol BH 4 or lower, providing specific design guidelines to tune existing metal borohydrides or synthesize new ones. We then use first-principles methods to study the effects of Sc alloying in Al(BH 4 ) 3 . Our results for the thermodynamic properties of the Al 1−x Sc x (BH 4 ) 3 alloy clearly show the stabilizing effect of Sc alloying and thus the suppression of diborane production. We conclude that stabilizing Al(BH 4 ) 3 and similar borohydrides via alloying or other means is a promising route to suppress diborane production and thus develop viable hydrogen storage materials.

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Section: Introductionmentioning

confidence: 99%

Suppressing diborane production during the hydrogen release of metal borohydrides: The example of alloyed Al(BH 4 ) 3

Harrison

Thonhauser

2016

International Journal of Hydrogen Energy

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“…For the same amount of current, the voltage drop between the junction voltage and the terminal voltage becomes greater as series resistance increases [44]. As a result, current-controlled segment of the I-V curve initiates to sag toward the origin, causing a remarkable decrease in the terminal voltage and a minor contraction in I SC , the short-circuit current.…”

Section: Series Resistance (R S )mentioning

confidence: 99%

“…Very inferior amount of R p will attain a significant deflation in V OC . Much as in the case of a large value of series resistance, a poorly shunted solar cell will take on operating attributes analogous to those of a resistor [44]. PV cell efficiency as well as maximum power is increased with increasing value of shunt resistance.…”

Section: Shunt Resistance (R P )mentioning

confidence: 99%

Comparative Analysis between Single Diode and Double Diode Model of PV Cell: Concentrate Different Parameters Effect on Its Efficiency

Ahmad¹,

Sobhan²,

Nayan³

2016

JPEE

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This research appraises comparative analysis between single diode and double diode model of photovoltaic (PV) solar cells to enhance the conversion efficiency of power engendering PV solar systems. Single diode model is simple and easy to implement, whereas double diode model has better accuracy which acquiesces for more precise forecast of PV systems performance. Exploration is done on the basis of simulation results and MATLAB tool is used to serve this purpose. Simulations are performed by varying distinct model parameters such as solar irradiance, temperature, value of parasitic resistances, ideality factor of diode and number of series and parallel connected solar cells used to assemble PV array. Conspicuous demonstration is executed to analyze effects of these specifications on the efficiency curve and power vs. voltage output characteristics of PV cell for specified models.

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“…Energy systems have been in transition, extending their boundaries beyond the energy systems themselves, characterized in the 3-D interactive extensions that relate to the dimensions of physical Space, Time scale and Human behaviors, so called Space-TimeHuman 3D extension [14]. This special issue covers part of the research results, which provided the responses and solutions to the transition of future energy toward a sustainable future.…”

mentioning

confidence: 98%