A lifecycle environmental impact analysis was conducted for SF6 used as an insulating gas in electrical devices. Eight scenarios with different forms of usage as an insulating gas (pure SF6 and gaseous mixture of SF6 with nitrogen) and treatment processes of waste SF6 (e.g., reproduction after decomposition, reuse after purification) are assumed. Energy consumption and emission of pollutants an...

Title of Document: Efficiency Enhancement for Natural Gas Liquefaction with CO2 Capture and Sequestration through Cycles Innovation and Process Optimization Abdullah Alabdulkarem, Doctor of Philosophy, 2014 Directed By: Professor, Reinhard Radermacher, Mechanical Engineering Liquefied natural gas (LNG) plants are energy intensive. As a result, the power plants operating these LNG plants emit hi...

Fuel cell-based hybrid cycles that include conventional power generators have been created to modify energy performance and output power. In the present paper, integrated biomass gasification (IBG)-molten carbonate fuel cell (MCFC)-gas turbine (GT) and steam turbine (ST) combined power cycle is introduced as an innovative technique in terms of sustainable energy. In addition, biomass gasificati...

This paper presents the effect of preload on static and dynamic performance characteristics of several gas-lubricated noncircular journal bearing configurations. The linearized system approach using finite element method is used to obtain both steady state and dynamic characteristics. The results of the investigation shows that preload has a significant effect on frictional power loss and the ...

In its efforts to meet greenhouse gas emissions targets, international policy has focused almost exclusively on the energy sector. Yet, as the global population and per capita demand for food both increase, emissions from agricultural sources risk jeopardising the achievement of those climate targets, as they already account for over a quarter of all anthropogenic emissions. The risk is heighte...