Concept

Locomotive à vapeur

Publications associées (32)

Thermo-economic and environmental comparison of supercritical water and enzymatic hydrolysis of sugarcane bagasse in a biorefinery concept

François Maréchal, Adriano Viana Ensinas

In this study, we discuss the difference regarding thermo-economic and environmental (water intake) aspects between two methods of biomass hydrolysis. A thermo-economic model was developed using Aspen Plus® and MATLAB software in order to analyze the energ ...

2017

Characterization of hydraulic behavior of orifices in conduits

Nicolas Jean François Pascal Ghislain Adam

Surge tanks in high-head power plants ensure safe and flexible transient operation of the hydraulic machinery. Orifices or throttles in surge tanks are often critical structural elements in view of the good performance of surge tanks and the stability of t ...

EPFL-LCH2017

Optimal Operations and Resilient Investments in Steam Networks

François Maréchal, Greta Martha Van Eetvelde, Laurent Gabriel Félix Alexandre Stéphane Bungener

Steam is a key energy vector for industrial sites, most commonly used for process heating and cooling, cogeneration of heat and mechanical power as a motive fluid or for stripping. Steam networks are used to carry steam from producers to consumers and betw ...

2016

Modeling and Optimization of an Industrial Ammonia Synthesis Unit: An Exergy Approach

Daniel Alexander Florez Orrego

An exergy modeling and optimization of an industrial ammonia unit based on steam methane reforming (SMR) process is presented. The base-case unit produces about 1000 t NH3/day [1], as well as power and steam, with no auxiliary exergy use. Some critical ope ...

Faculty of Mechanical Engineering, University of Ljubljana2016

Energy Efficiency and Integration in the Refining and Petrochemical Industries

Laurent Gabriel Félix Alexandre Stéphane Bungener

Industrial sites and their associated energy systems are estimated to be responsible for 31% of worldwide energy consumption. Improving their energy efficiencies has the potential to reduce production costs of industrial sites and contribute towards the 20 ...

EPFL2016

Resilient decision making in steam network investments

François Maréchal, Greta Martha Van Eetvelde, Laurent Gabriel Félix Alexandre Stéphane Bungener

Steam is a key energy vector for industrial sites, used for process heating, direct injection and stripping, tracing and cogeneration of mechanical power. Steam networks transport steam from producers to consumers and across different pressure levels. The ...

The Italian Association of Chemical Engineering2015

Optimisation of unit investment and load shedding in a steam network facing undercapacity

François Maréchal, Greta Martha Van Eetvelde, Laurent Gabriel Félix Alexandre Stéphane Bungener

Steam networks and their utilities should be dimensioned to satisfy day-to-day demand as well peaks. Peaks can be caused by unit start-ups, extreme weather conditions or combinations of high demand from process units. During maintenance operations or unexp ...

2015

Design modification supporting method based on product usage data in closed-loop PLM

Paul Xirouchakis, Jongho Shin

Thanks to recent technology related to product monitoring and data communication, it is now possible for a company to gather various kinds of product usage data during its operation in a ubiquitous way. However, the application of the newly gathered data i ...

Taylor & Francis Ltd2015

Modelling of a steam network using data reconciliation as a management tool

Laurent Gabriel Félix Alexandre Stéphane Bungener

The first step towards managing and optimising the steam network of an industrial cluster or plant is to accurately measure the production and consumption of the different levels of steam. Measurement errors as well as unmeasured contributors lead to inacc ...

2014

Power Electronic Traction Transformer - Medium Voltage Prototype

Drazen Dujic, Akos Mester, Toufann Chaudhuri

Recently, the world’s first ever power electronic traction transformer (PETT) for a 15-kV 16.7-Hz railway grid has been newly developed, commissioned, and installed on the test locomotive, where the PETT is presently in use. The design and development of t ...

2014

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