Social and Behavioral Sciences Commons^™

Slides: Routes To Sustainability: Natural Gas Development And Air And Water Resources In The Rocky Mountain Region, Mark Williams

Monitoring and Protecting Groundwater During Oil and Gas Development (November 26)

Presenter: Mark Williams, University of Colorado Boulder

14 slides

Comparison Of Methodologies For Assessment Of Harmonic Current Emission Limits For Large Installations Connected To Lv Networks, Biyanvilage Perera, Sarath Perera, Philip Ciufo, Victor J. Gosbell

Faculty of Engineering and Information Sciences - Papers: Part A

With the proliferation of large, disturbing installations (loads and distribution generators) connected to public low voltage networks, managing the harmonic voltage levels in the network has become a key concern to distribution network service providers (DNSPs). Therefore, it is important that DNSPs limit the harmonic current emission by individual installations. This paper reviews a number of methodologies that exist in the current technical literature in relation to the assessment of harmonic current emission limits for disturbing installations connected to the public LV network. Application of these methodologies is demonstrated through a case study on a test network. The study shows …

Thermodynamic Assessment Of Aluminium Production Through Carbosulphidation Route, Nazmul Huda, Muhammad A. Rhamdhani, M A. Dewan, Geoffrey A. Brooks, B J. Monaghan, L Prentice

Faculty of Engineering and Information Sciences - Papers: Part A

Indirect carbothermal reduction of alumina for the production of aluminium has been claimed to be better compared to the existing Hall-Heroult process in-terms of energy usage, generation of perfluorocarbons and overall greenhouse gas emission. In the process, alumina is reduced to an intermediate compound which is then further reduced to Al. It has been shown from the previous thermodynamic study by the authors that high conversion of alumina can be obtained if it is reduced to Al-chloride, Al-nitride or Al-sulphide. This paper deals with detailed systematic thermodynamic analysis of the process through carbosulphidation route, where alumina is first reduced to …

The Use Of Transient State Estimation For Voltage Dip/Sag Assessment, A Farzanehrafat, N R. Watson, S Perera

Faculty of Engineering and Information Sciences - Papers: Part A

Voltage sags are common events on the electric power network caused by network faults and the large load connections. This power quality issue can affect a wide range of electrical equipment malfunctions, interruptions or losses and are of particular concern to industry. A complete knowledge of the source is a prerequisite before any remedial action is taken. On the other hand, it is not feasible to fully monitor voltage sags occurred throughout the network. For this reason state estimation techniques have been extended into power quality issues and called Power Quality State Estimation (PQSE). This paper, introduces the use of …

Quantitative Assessment Of Landslide Frequency Versus Magnitude Of Displacement, P N. Flentje, R N. Chowdhury, Anthony Miner, C Mazengarb

Faculty of Engineering and Information Sciences - Papers: Part A

Understanding landslide frequency is an important challenge in the process of the assessment of landslide risk. Importantly, from the perspective of landslide risk management today, this paper investigates the relationship between 'how often will a landslide move' and 'how far will it move when it does move'. Such relationships must reflect the continuum between the lower frequency 'catastrophic' type failures and the much higher frequency millimeter type magnitudes of displacement; and intervals along this continuum will likely have different management significance. So, when considering the frequency of landslide move-ment, the full question must be 'what is the frequency of a …