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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Flame Studies on Conventional, Alternative, and Surrogate Jet Fuels, and Their Reference Hydrocarbons

Hui, Xin 08 March 2013 (has links)
No description available.
2

Implementación de un sistema Poka-yoke para el control de mermas en el transporte de combustibles líquidos y rediseño de un método de descarga basado en la metodología SMED para incrementar la eficiencia de flota en una red de estaciones de servicio / Implementation of a Poka-yoke system to control liquid fuels losses in a transportation process and redesign of a liquid fuels unloading method based on the SMED methodology to increase fleet efficiency in a service stations network

Gallo Flores, Luis Felipe 25 November 2020 (has links)
Uno de los principales retos de las empresas de hoy en día para optimizar su competitividad en el mercado es el incorporar la filosofía Lean en sus procesos productivos y logísticos para minimizar los sobrecostos en los que se incurren por la generación de desperdicios tales como mermas, inventario inmovilizado, tiempos improductivos, reprocesos, entre otros. El presente caso de estudio busca demostrar cómo la aplicación de tres herramientas de Lean Manufacturing (Poka-yoke, SMED y Mejora de Métodos) en los procesos de transporte y descarga de hidrocarburos líquidos en una red de estaciones de servicio permite reducir las pérdidas de producto en ruta e incrementar la eficiencia global de la flota vehicular. El caso de estudio se ha realizado en una empresa peruana comercializadora de hidrocarburos para la cual se ha diseñado un sistema Poka-yoke para la medición de las pérdidas de producto en el transporte de combustible y un método SMED para la reducción del tiempo de descarga de combustible en las estaciones de servicio. Como resultado se obtuvo que el sistema Poka-yoke logró medir de manera confiable y precisa las pérdidas de producto en ruta, con lo que se pudieron disuadir las sustracciones ilegales de combustible y reducir la merma global en el transporte en un 86%; asimismo, el nuevo método SMED externalizó la mayoría de actividades de preparación del proceso de descarga y redujo el tiempo promedio del mismo en un 58%, lo que a su vez incrementó la eficiencia de la flota vehicular en un 42%. / One of the main challenges for nowadays companies to optimize their market competitiveness is to incorporate the Lean philosophy in their productive and logistic processes to minimize the cost overruns incurred as a result of the generation of wastes such as product losses, immobilized inventory, unproductive times, reprocesses, among others. This case study aims to demonstrate how the application of three Lean Manufacturing tools (Poka-yoke, SMED and Methods Improvement) in the processes of transportation and unloading of liquid hydrocarbons in a service stations network allows reducing product losses in transit and increasing the overall efficiency of the vehicle fleet. The case study has been carried out in a peruvian hydrocarbon trading company for which a Poka-yoke system has been designed to measure product losses in fuel transportation and a SMED method to reduce the unloading time of fuel at service stations. As a result, the Poka-yoke system was able to accurately measure product losses in transit, which detered illegal fuel thefts and reduced the overall transportation losses by 86%. Likewise, the new SMED method externalized most of the unloading process setup activities and reduced the average time of the unloading process by 58%, which in turn increased the efficiency of the vehicle fleet by 42%. / Trabajo de Suficiencia Profesional
3

Analysis of Channel Networks and the Potential for Sediment Transport in the Vicinity of the North Polar Seas of Titan

Cartwright, Richard 17 July 2009 (has links)
This study analyzes the available radar evidence in order to describe the morphology of channel networks around the north polar seas of Titan. Critical flow depths necessary to entrain water-ice grains, and denudation rates for a north polar channel network are discussed. The results indicate that channel networks on Titan have similar morphologies to channel networks cut by water on Earth. We also find that water-ice sediment should be readily entrained in the headwaters and downstream sections of the analyzed Titanian basin, given sufficient flow depths of liquid hydrocarbons. Also, the importance of slope and the elevated topography of the highlands surrounding the polar lakes are considered, as well as potential formation theories for the elevated highlands and low-lying maria that dominate the north polar region.

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