Exploring pristine and Li-doped Mg2NiH4 compounds with potential lithium-storage properties: Ab initio insight
In this work, pure and Li-doped Mg2NiH4 hydrides are explored for potential Li-ion battery conversion anode materials applications from state-of-the-art Density functional theory. The most thermodynamically stable Li-doped Mg2NiH4 structure is determined, which possesses a smaller band gap than pure material and owns a theoretical specific capacity of 975.35 mA [...]
Feed-in tariff structure development for photovoltaic electricity and the associated benefits for the Kingdom of Bahrain
In this study, the feed-in tariff (FIT) scheme was considered to facilitate an effective introduction of renewable energy in the Kingdom of Bahrain. An economic model was developed for the estimation of feasible FIT rates for photovoltaic (PV) electricity on a residential scale. The calculations of FIT rates were based [...]
Photoluminescence of polycrystalline CuIn0.5Ga0.5Te2 thin films grown by flash evaporation
Polycrystalline CuIn0.5Ga0.5Te2 films were deposited by flash evaporation from ingot prepared by reacting, in stoichiometric proportions, high purity Cu, In, Ga and Te elements in vacuum sealed quartz. The as-obtained films were characterized by X – ray diffraction (XRD), transmission electron microscopy (TEM) combined with energy dispersive spectroscopy (EDS). XRD [...]
Long-term energy peak load forecasting models: A hybrid statistical approach
Electricity demand forecasting is an essential process for electricity planning, designing strategies and recommending future energy policies. The changing behavior of the socio-economic growth beside the incomplete coverage of the environmental impacts can make a long-term energy demand forecasting process for a specific energy network challenging. This article presents four [...]
Effect of hydrogen addition using on-board alkaline electrolyser on SI engine emissions and combustion
In this study, an electrolyser was used to supply hydrogen to the SI engine. Firstly, the appropriate operation point for the electrolyser was determined by adjusting the amount of KOH in the electrolyte to 5%, 10%, 20% and 30% by mass, and applying 12 V, 16 V, 20 V, 24 [...]
Hydrocracking of virgin and waste plastics: A detailed review
The continuous increase in the demand for plastics is causing severe problems of managing increased waste plastic generation. The hydrocracking of plastic materials is considered an important method of converting these wastes into liquid fuels of high quality. Many attempts have been made in the search for a suitable catalyst [...]
Study of Semimagnetic Mn-Doped WO3 Nanoparticles Synthesised by Precipitation Method: Hydrogenation Creates a Promising DMS
Abstract Tungsten oxide (WO3) nanoparticles doped with different amounts of manganese ions (W1−xMnxO3, where x = 0.011, 0.022 and 0.044) were synthesised by hydraulic acid-assisted precipitation, followed by thermal calcinations. The powders were characterised by X-ray fluorescence (XRF), X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS) and magnetic measurements. The monoclinic [...]
Optimization of CO2 Biofixation by Chlorella vulgaris Using a Tubular Photobioreactor
The effects of various CO2 concentrations in CO2 bioconversion by cultivation of microalga Chlorella vulgaris were investigated using a vertical tubular photobioreactor. The response surface technique with central composite design was applied to model the CO2 biofixation rate, the specific growth rate (SGR), and the biomass productivity of C. vulgaris [...]
Robust sliding mode control for three-phase rectifier supplied by non-ideal voltage
This paper proposes a linear feedback structure of sliding mode control for a three-phase rectifier fed by a non-ideal supply voltage. The aim of the proposed technique is to achieve power flow with unity power factor even under distorted and/or unbalanced grid voltage condition. The performance of the proposed sliding [...]
Accelerating the transformation to a green university: University of Bahrain experience
Many universities are striving to have an environmental impact on the society as they are considered as small communities aiming to be eco-friendly and having low CO2 emission. This concept has been emerging after the worldwide concern on the ozone depletion issue and global warming. As a result, many titles [...]