All Outputs (1202)

A progressive study into offshore wind farm maintenance optimisation using risk based failure analysis. (2014)
Journal Article
SINHA, Y. and STEEL, J.A. 2015. A progressive study into offshore wind farm maintenance optimisation using risk based failure analysis. Renewable and sustainable energy reviews [online], 42, pages 735-742. Available from: https://doi.org/10.1016/j.rser.2014.10.087

Offshore Wind Farm consists of an array of Wind Turbines electrical, communication, command and control systems. At present the cost of maintaining Wind Turbines in the offshore locations is very high (about 35% of lifetime costs). This work puts emp... Read More about A progressive study into offshore wind farm maintenance optimisation using risk based failure analysis..

Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability. (2014)
Conference Proceeding
AHMED, K.H. and ABOUSHADY, A.A. 2014. Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability. In Proceedings of the 40th IEEE Industrial Electronics Society annual conference (IECON 2014), 30 October - 01 November 2014, Dallas, USA. Piscataway: IEEE [online], pages 4676-4682. Available from: https://doi.org/10.1109/IECON.2014.7049207

One of the main challenges of voltage source converter based HVDC systems is DC faults. In this paper, two different modified half-bridge modular multilevel converter topologies are proposed. The proposed converters offer a fault tolerant against the... Read More about Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability..

Hydrogen separation using silica-based composite membranes. (2014)
Journal Article
KAJAMA, M.N., NWOGU, N.C. and GOBINA, E. 2014. Hydrogen separation using silica-based composite membranes. Advanced materials research [online], 1051: selected papers from the 2014 international conference on green materials and environmental engineering (GMEE 2014), 21-22 September 2014, Hong Kong, China, pages 107-111. Available from: https://doi.org/10.4028/www.scientific.net/AMR.1051.107

Silica sol-gel membranes have been developed for moderate temperature (300°C) separation of hydrogen (H2) from nitrogen (N2), methane (CH4) and argon (Ar) gas molecules. Tubular ceramic support with 15 nm nominal pore diameter and 45% porosity was mo... Read More about Hydrogen separation using silica-based composite membranes..

Indigenous capability building as an intervention strategy for sustainable enerby implementation in vulnerable societies. (2014)
Thesis
GARNIATI, L. 2014. Indigenous capability building as an intervention strategy for sustainable enerby implementation in vulnerable societies. Robert Gordon University, PhD thesis.

Geospatial regions have different requirements for energy development due to variations in environmental, economic, social, and political constraints which influence their energy demand profiles and generation capacities. These constraints determine... Read More about Indigenous capability building as an intervention strategy for sustainable enerby implementation in vulnerable societies..

Forward and backward motion control of a vibro-impact capsule system. (2014)
Journal Article
LIU, Y., PAVLOVSKAIA, E., WIERCIGROCH, M. and PENG, Z. 2015. Forward and backward motion control of a vibro-impact capsule system. International journal of non-linear mechanics [online], 70, pages 30-46. Available from: https://doi.org/10.1016/j.ijnonlinmec.2014.10.009

A capsule system driven by a harmonic force applied to its inner mass is considered in this study. Four various friction models are employed to describe motion of the capsule in different environments taking into account Coulomb friction, viscous dam... Read More about Forward and backward motion control of a vibro-impact capsule system..

Reactive power minimization of dual active bridge DC/DC converter with triple phase shift control using neural network. (2014)
Conference Proceeding
HARRYE, Y.A., AHMED, K.H. and ABOUSHADY, A.A. 2014. Reactive power minimization of dual active bridge DC/DC converter with triple phase shift control using neural network. In Proceedings of the 3rd International conference on renewable energy research and applications (ICRERA 2014), 19-22 October 2014, Milwakuee, USA. Piscataway: IEEE [online], pages 566-571. Available from: https://doi.org/10.1109/ICRERA.2014.7016448

Reactive power flow increases dual active bridge (DAB) converter RMS current leading to an increase in conduction losses especially in high power applications. This paper proposes a new optimized triple phase shift (TPS) switching algorithm that mini... Read More about Reactive power minimization of dual active bridge DC/DC converter with triple phase shift control using neural network..

Sensorless multi-loop control of phase-controlled series-parallel resonant converter. (2014)
Conference Proceeding
ABOUSHADY, A.A. and AHMED, K.H. 2014. Sensorless multi-loop control of phase-controlled series-parallel resonant converter. In Proceedings of the 3rd International conference on renewable energy research and applications (ICRERA 2014), 19-22 October 2014, Milwakuee, USA. Piscataway: IEEE [online], pages 502-507. Available from: https://doi.org/10.1109/ICRERA.2014.7016435

This paper proposes a multi-loop controller for the phase-controlled series-parallel resonant converter. Output voltage is solely measured for control and inner loop is used to enhance closed loop stability and dynamic performance compared to single-... Read More about Sensorless multi-loop control of phase-controlled series-parallel resonant converter..

Gas transport and characterization of inorganic ceramic membrane for lactic acid esterification. (2014)
Conference Proceeding
EDIDIONG, O., HABIBA, S. and GOBINA, E. 2014. Gas transport and characterization of inorganic ceramic membrane for lactic acid esterification. In Ao, S.-I., Douglas, C., Grundfest, W.S. and Burgstone, J. (eds.) Proceedings of the 2014 World congress on engineering and computer science (WCECS 2014), 22-24 October 2014, San Francisco, USA. Lecture notes in engineering and computer science, 2214. Hong Kong: International Association of Engineers [online], pages 590-594. Available from: http://www.iaeng.org/publication/WCE2014

Ethyl lactate is an important organic ester, which is biodegradable in nature and widely used as food additive, perfumery, flavor chemicals and solvent. Inorganic porous ceramic membrane has shown a lot of advantages in the equilibrium process of eth... Read More about Gas transport and characterization of inorganic ceramic membrane for lactic acid esterification..

Rotationally asymmetrical compound parabolic concentrator for concentrating photovoltaic applications. (2014)
Journal Article
ABU-BAKAR, S.H., MUHAMMAD-SUKKI, F., RAMIREZ-INIGUEZ, R., MALLICK, T.K., MUNIR, A.B., YASIN, S.H.M. and RAHIM, R.A. 2014. Rotationally asymmetrical compound parabolic concentrator for concentrating photovoltaic applications. Applied energy [online], 136, pages 363-372. Available from: https://doi.org/10.1016/j.apenergy.2014.09.053

This paper describes a novel type of solar concentrator - a rotationally asymmetrical compound parabolic concentrator (RACPC). The RACPC aims at addressing the following objectives: (i) to increase the electrical output of a concentrating photovoltai... Read More about Rotationally asymmetrical compound parabolic concentrator for concentrating photovoltaic applications..

Cold heavy oil production using CO2-EOR technique. (2014)
Thesis
TCHAMBAK, E.N. 2014. Cold heavy oil production using CO2-EOR technique. Robert Gordon University, PhD thesis.

This thesis presents results of a successful simulation study using the CO2-EOR technique to enable production from an offshore heavy oil field, named here as Omega, which is located offshore West Africa at a water depth around 2000 m. The findings a... Read More about Cold heavy oil production using CO2-EOR technique..

Rheological behaviour of single-phase non-Newtonian polymer solution in complex pore geometry: a simulation approach. (2014)
Conference Proceeding
IDAHOSA, P., OLUYEMI, G., PRABHU, R. and OYENEYIN, B. 2014. Rheological behaviour of single-phase non-Newtonian polymer solution in complex pore geometry: a simulation approach. In Proceedings of the 2014 COMSOL conference, 17-19 September 2014, Cambridge, UK. Burlington: COMSOL [online], article ID 18685. Available from: https://www.comsol.com/paper/rheological-behaviour-of-single-phase-non-newtonian-polymer-solution-in-complex--18685

One of the most important criteria for evaluating chemical enhanced oil recovery (EOR) processes that use polymers is its rheological behaviour which in turn account for other physical effects of adsorption and resistance factors during polymer-rock... Read More about Rheological behaviour of single-phase non-Newtonian polymer solution in complex pore geometry: a simulation approach..

Numerical studies of the velocity distribution within the volute of a centrifugal pump. (2014)
Presentation / Conference
AL-OBAIDI, A., PRADHAN, S., ASIM, T., MISHRA, R. and ZALA, K. 2014. Numerical studies of the velocity distribution within the volute of a centrifugal pump. Presented at 27th Condition monitoring and diagnostic engineering management international congress 2014 (COMADEM 2014), 16-18 September 2014, Brisbane, Australia.

Centrifugal pumps play an essential role in engineering systems since they are widely used in the process and power industries. The performance of a centrifugal pump needs to be maximised due to its importance and this depends on the flow structure w... Read More about Numerical studies of the velocity distribution within the volute of a centrifugal pump..

The effect of blade angles of the vertical axis wind turbine on the output performance. (2014)
Presentation / Conference
MOHAMED, F., PARK, K.-S., PRADHAN, S., MISHRA, R., ZALA, K., ASIM, T. and AL-OBAIDI, A. 2014. The effect of blade angles of the vertical axis wind turbine on the output performance. Presented at 27th Condition monitoring and diagnostic engineering management international congress 2014 (COMADEM 2014), 16-18 September 2014, Brisbane, Australia.

There are many social, political and environmental issues associated with the use of fossil fuels. For this reason, there are numerous investigations currently being carried out to develop newer and renewable sources of energy to alleviate energy dem... Read More about The effect of blade angles of the vertical axis wind turbine on the output performance..

A low complexity visual saliency model based on in-focus regions and centre sensitivity. (2014)
Conference Proceeding
CHILUKAMARI, J., KANNANGARA, S. and MAXWELL, G. 2014. A low complexity visual saliency model based on in-focus regions and centre sensitivity. In Proceedings of the 4th IEEE international conference on consumer electronics (ICCE-Berlin 2014), 7-10 September 2014, Berlin, Germany. New York: IEEE [online], article number 7034250, pages 411-414. Available from: https://doi.org/10.1109/ICCE-Berlin.2014.7034250

A novel low-complexity visual saliency detection algorithm for detecting salient regions in images is proposed. The algorithm derives salient regions based on in-focus regions and image centre sensitivity. The performance of the algorithm in predicti... Read More about A low complexity visual saliency model based on in-focus regions and centre sensitivity..

Five principles for the practice of knowledge exchange in environmental management. (2014)
Journal Article
REED, M.S., STRINGER, L.C., FAZEY, I., EVELY, A.C. and KRUIJSEN, J.H.J. 2014. Five principles for the practice of knowledge exchange in environmental management. Journal of environmental management [online], 146, pages 337-345. Available from: https://doi.org/10.1016/j.jenvman.2014.07.021

This paper outlines five principles for effective practice of knowledge exchange, which when applied, have the potential to significantly enhance the impact of environmental management research, policy and practice. The paper is based on an empirical... Read More about Five principles for the practice of knowledge exchange in environmental management..

Integration of gas transport through a composite catalytic inorganic ceramic membrane for environmental gas separation processes. (2014)
Journal Article
NWOGU, N., OKON, E. and GOBINA, E. 2014. Integration of gas transport through a composite catalytic inorganic ceramic membrane for environmental gas separation processes. International journal of scientific engineering and technology [online], 3(9) pages 1184-1188. Available from: http://ijset.com/publication/v3/268.pdf

This work presents the transport behaviour of carrier gases with inorganic ceramic membrane used for environmental gas separations at 289K and 0.01-1 bar. The gases tested include: Helium (He), Nitrogen (N2), Carbon dioxide (CO2) and Argon (AR). The... Read More about Integration of gas transport through a composite catalytic inorganic ceramic membrane for environmental gas separation processes..

Purification of gases using nanoporous inorganic membranes. (2014)
Journal Article
KAJAMA, M.N., SHEHU, H. and GOBINA, E. 2014. Purification of gases using nanoporous inorganic membranes. International journal of scientific engineering and technology [online], 3(9), pages 1156-1159. Available from: https://www.ijset.com/publication/v3/262.pdf

The application of membranes has gained acceptance in the chemical and process industries for separation and purification for over three decades and is currently being practiced for natural gas processing, waste water treatment among others. A crack-... Read More about Purification of gases using nanoporous inorganic membranes..

Compression-after-impact (CAI) performance of epoxycarbon fibre-reinforced nanocomposites using nanosilica and rubber particle enhancement. (2014)
Journal Article
NIKFAR, B. and NJUGUNA, J. 2014. Compression-after-impact (CAI) performance of epoxycarbon fibre-reinforced nanocomposites using nanosilica and rubber particle enhancement. IOP conference series: materials science and engineering [online], 64(1), Article 012009. Available from: https://doi.org/10.1088/1757-899X/64/1/012009

One of the problems in the design of automotive structures and body parts made by fibre reinforced composites is that these materials are susceptible to a small energy impact caused by for instance, accidental tool drop during maintenance or stone st... Read More about Compression-after-impact (CAI) performance of epoxycarbon fibre-reinforced nanocomposites using nanosilica and rubber particle enhancement..

A review on the effect of mechanical drilling on polymer nanocomposites. (2014)
Journal Article
STAROST, K. and NJUGUNA, J. 2014. A review on the effect of mechanical drilling on polymer nanocomposites. IOP conference series: materials science and engineering [online], 64(1), Article 012031. Available from: https://doi.org/10.1088/1757-899X/64/1/012031

Over the past decade, polymer nanocomposites have undergone intensive research and development ensued by its increasing implementation within commercial applications. Consequently, the full life-cycle performance and any health risks associated with... Read More about A review on the effect of mechanical drilling on polymer nanocomposites..

Characterization of synthesized polyurethane/montmorillonite nanocomposites foams. (2014)
Journal Article
ANSARI, F., SACHSE, S., MICHALOWSKI, S., KAVOSH, M., PIELICHOWSKI, K. and NJUGUNA, J. 2014. Characterization of synthesized polyurethane/montmorillonite nanocomposite foams. IOP conference series: materials science and engineering [online], 64(1), Article 012039. Available from: https://doi.org/10.1088/1757-899X/64/1/012039

Nanophased hybrid composites based on polyurethane/montmorillonite (PU/MMT) have been fabricated. The nanocomposite which was formed by the addition of a polyol premix with 4,4′-diphenylmethane diisocyanate to obtain nanophased polyurethane foams whi... Read More about Characterization of synthesized polyurethane/montmorillonite nanocomposites foams..