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Characteristics of Methane Hydrate Formation in Artificial and Natural Media

Zhang, Peng; Wu, Qingbai; Yang, Yuzhong - In: Energies 6 (2013) 3, pp. 1233-1249

The formation of methane hydrate in two significantly different media was investigated, using silica gel as an artificial medium and loess as a natural medium. The methane hydrate formation was observed through the depletion of water in the matrix, measured via the matrix potential and the...

Persistent link: https://www.econbiz.de/10010668070

Measurements of Water Permeability in Unconsolidated Porous Media with Methane Hydrate Formation

Li, Bo; Li, Xiao-Sen; Li, Gang; Jia, Jia-Lin; Feng, … - In: Energies 6 (2013) 7, pp. 3622-3636

Permeability is one of the key factors that determine the fluids flow capacity and production potential of hydrate deposits. In this study, an experimental setup is developed to investigate the flow properties of the porous media, and the permeabilities to water are measured in the...

Persistent link: https://www.econbiz.de/10011031202

Experimental Investigation into the Combustion Characteristics of Propane Hydrates in Porous Media

Chen, Xiang-Ru; Li, Xiao-Sen; Chen, Zhao-Yang; Zhang, Yu; … - In: Energies 8 (2015) 2, pp. 1242-1255

The combustion characteristics of both pure propane hydrates and the mixtures of hydrates and quartz sands were investigated by combustion experiments. The flame propagation, flame appearance, burning time and temperature in different hydrate layers were studied. For pure propane hydrate...

Persistent link: https://www.econbiz.de/10011160785

Implications of Stably Stratified Atmospheric Boundary Layer Turbulence on the Near-Wake Structure of Wind Turbines

Bhaganagar, Kiran; Debnath, Mithu - In: Energies 7 (2014) 9, pp. 5740-5763

Turbulence structure in the wake behind a full-scale horizontal-axis wind turbine under the influence of real … boundary layer (ABL) simulations have been performed to obtain mean and turbulence states of the atmosphere under stable … ABL turbulence, height-varying wind angle and low-level jets are ABL metrics that influence the structure of the turbine …

Persistent link: https://www.econbiz.de/10010945722

Impacts of Ventilation Ratio and Vent Balance on Cooling Load and Air Flow of Naturally Ventilated Attics

Wang, Shimin; Shen, Zhigang - In: Energies 5 (2012) 9, pp. 3218-3232

The impacts of ventilation ratio and vent balance on cooling load and air flow of naturally ventilated attics are studied in this paper using an unsteady computational fluid dynamics (CFD) model. Buoyancy-driven turbulent ventilations in attics of gable-roof residential buildings are simulated...

Persistent link: https://www.econbiz.de/10010668126

The Impact of Roof Pitch and Ceiling Insulation on Cooling Load of Naturally-Ventilated Attics

Wang, Shimin; Shen, Zhigang; Gu, Linxia - In: Energies 5 (2012) 7, pp. 2178-2196

A 2D unsteady computational fluid dynamics (CFD) model is employed to simulate buoyancy-driven turbulent ventilation in attics with different pitch values and ceiling insulation levels under summer conditions. The impacts of roof pitch and ceiling insulation on the cooling load of gable-roof...

Persistent link: https://www.econbiz.de/10010676134

Turbulent Flow Inside and Above a Wind Farm: A Wind-Tunnel Study

Chamorro, Leonardo P.; Porté-Agel, Fernando - In: Energies 4 (2011) 11, pp. 1916-1936

found to be higher than that predicted by some existing models. Momentum recovery and turbulence intensity are shown to be …

Persistent link: https://www.econbiz.de/10011031318