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Iterative approach for optimising coefficient of power, coefficient of lift and drag of wind turbine rotor

Rajakumar, S.; Ravindran, D. - In: Renewable Energy 38 (2012) 1, pp. 83-93

This paper presents an approach for the determination of aerodynamic performance characteristics of horizontal-axis wind turbines. The optimum twist of a windmill blade is examined on the basis of elementary blade-element theory. For a given wind speed and blade angular velocity, it is shown...

Persistent link: https://www.econbiz.de/10010803716

Parametric and optimization study of a PEM fuel cell performance using three-dimensional computational fluid dynamics model

Sadiq Al-Baghdadi, Maher A.R.; Shahad Al-Janabi, Haroun A.K. - In: Renewable Energy 32 (2007) 7, pp. 1077-1101

A full three-dimensional, non-isothermal computational fluid dynamics model of a proton exchange membrane (PEM) fuel cell with straight flow field channels has been developed. This comprehensive model accounts for the major transport phenomena in a PEM fuel cell: convective and diffusive heat...

Persistent link: https://www.econbiz.de/10010803718

Experimental investigation and computational validation of heat losses from the cavity receiver used in linear Fresnel reflector solar thermal system

Sahoo, Sudhansu S.; Varghese, Shinu M.; Suresh Kumar, C.; … - In: Renewable Energy 55 (2013) C, pp. 18-23

computational fluid dynamics (CFD). After validation, contribution of convection and radiation to the total heat transfer are found … out using CFD. Computational predictions are shown to be consistent with the experimental observations which show that the … CFD model is a reliable tool for predicting heat loss and overall heat loss coefficient. It was found that losses due to …

Persistent link: https://www.econbiz.de/10010803845

Model prediction of effects of operating parameters on proton exchange membrane fuel cell performance

Yuan, Wei; Tang, Yong; Pan, Minqiang; Li, Zongtao; … - In: Renewable Energy 35 (2010) 3, pp. 656-666

, catalysts layers at the anode and the cathode as well as the membrane. A commercial Computational Fluid Dynamics (CFD) software …

Persistent link: https://www.econbiz.de/10010803899

Microeolic turbines in the built environment: Influence of the installation site on the potential energy yield

Balduzzi, Francesco; Bianchini, Alessandro; Ferrari, Lorenzo - In: Renewable Energy 45 (2012) C, pp. 163-174

Generic proposals for an effective integration of renewable energy sources in the urban environment are frequently carried out by project developers, local governments and media, although an in-depth knowledge of the technical and energetic limitations is often missing. In particular, the...

Persistent link: https://www.econbiz.de/10010804250

Effect of roof shape, wind direction, building height and urban configuration on the energy yield and positioning of roof mounted wind turbines

Abohela, Islam; Hamza, Neveen; Dudek, Steven - In: Renewable Energy 50 (2013) C, pp. 1106-1118

Computational Fluid Dynamics (CFD) simulations for the purpose of identifying the effect of different roof shapes on the energy …

Persistent link: https://www.econbiz.de/10010804465

Computed effects of tip clearance on performance of impulse turbine for wave energy conversion

Thakker, A.; Dhanasekaran, T.S. - In: Renewable Energy 29 (2004) 4, pp. 529-547

This paper depicts numerical analysis on Impulse turbine with fixed guide vanes for wave energy conversion. From the previous investigations, it is found that one of the reasons for the mismatch between computed and experimental data is due to neglecting tip clearance ef fect. Hence, a 3-D model...

Persistent link: https://www.econbiz.de/10010804546

Wind turbine CFD modeling using a correlation-based transitional model

Lanzafame, R.; Mauro, S.; Messina, M. - In: Renewable Energy 52 (2013) C, pp. 31-39

This paper describes the development of a Horizontal Axis Wind Turbine 3D CFD model using the Ansys Fluent solver. The …

Persistent link: https://www.econbiz.de/10010804659

A hybrid energy storage system using pump compressed air and micro-hydro turbine

Yin, Jun lian; Wang, De zhong; Kim, Yu-Taek; Lee, Young-Ho - In: Renewable Energy 65 (2014) C, pp. 117-122

configuration of the MPT, which consists of spiral casing, tandem, runner and draft tube, CFD simulations of typical operating …

Persistent link: https://www.econbiz.de/10010804786

Influence of a velocity profile & support structure on tidal stream turbine performance

Mason-Jones, A.; O'Doherty, D.M.; Morris, C.E.; … - In: Renewable Energy 52 (2013) C, pp. 23-30

measurements was used as an inlet boundary for CFD analysis. The work shows that the presence of a suitably positioned stanchion …

Persistent link: https://www.econbiz.de/10010804802