Décembre 2017
Cost action MINEA - Workshop Modelling the stocks and flows of the built environment for construction and demolition waste management, Vienna, Austria, December 14, 2017
In Proceedings of the Life Cycle Management Conference, September 3rd/6th 2017, Luxembourg.
Juillet 2017
International Conference on Emerging and Renewable Energy: Generation and Automation (ICEREGA) 2017. Belfort. 7 Juillet 2017. 6 pages.
The purpose of this article is to study the portability of a non-intrusive and free of any external/internal disturbance diagnosis tool devoted to the monitoring of the State of Health (SoH) of PEM Fuel Cell (PEMFC) stack. The tool is based on a thorough analysis of the stack voltage signal using a multifractal formalism and wavelet leaders. It offers well-suited signatures indicators on the SoH of the Fuel Cell. Some relevant descriptors extracted from these patterns (singularity features) are used in the frame of Machine Learning approaches to allow the PEMFC fault identification. The proposed diagnosis strategy is evaluated with two different PEMFC stacks. The first one is designed for automotive applications and the second one is dedicated to stationary use (micro combined heat and power - μCHP application). The classification results obtained for the both stacks indicate that the proposed PEMFC diagnosis tool allows identifying simple operating faults as well as more complicated operating situations combining several fault types.
In SETAC Conference, May 7/11th 2017, Brussels, Belgium
(article, Gilney DAMM IEEE) PCIM 2017 (International Exhibition and Conference for Power Electronics and Energy Management)
PCIM 2017 (International Exhibition and Conference for Power Electronics and Energy Management)
Abstract: With growing concerns about environmental issues like climate change, energy efficiency has become crucial. In this framework, the regeneration of the braking energy of trains into electricity is a promising source to highly increase energy efficiency. The focus of this paper is to Design and Control a Direct Current (DC) Grid integrated in urban railway station, the solution consists in recovering and storing trains braking energy into a hybrid storage system and reusing it for non-railway applications such as loads in a train station and electric vehicles and their recharging plants. To attain this goal, the main points are power management and voltage control for the DC MicroGrid, and improving the dynamic performance of the system. These are obtained by controlling the energy storage system.
European Transport Conference, Barcelona, Spain, 5-7 October 20, 2016
Motorized transportation modes all consume energy and emit local pollutants – chemical and noise. Congestion can also be considered as a local pollution caused by some emitters onto some receivers. Various methods have been designed to evaluate impacts and relate them to emitters and/or receivers. Called “attribution” in environmental evaluation or “imputation” in economic analysis, these schemes’ purpose is to identify the causes of impacts and to design management or compensation schemes to alleviate their negative effects. The paper presents an analytical framework to devise attribution schemes for local mobility impacts in a territorial area applicable to every ground transportation mode. The method's first step relies on the evaluation of each trip-maker's individual contribution to local impacts. Such individual contributions can then be aggregated along any path, hence any trip between origin and destination. The trip's impact can then be attributed to the tripmaker, or the zone at the origin or destination end of the trip. After providing with a general introduction, a bibliographical review of attribution methods, several attribution schemes are provided and discussed in this paper. Then associated computation scheme is presented and an application instance is dealt with in the final part of the article.
Sustainable Built Environment (SBE) regional conference, Zurich, June 2016
Environmental performance considerations in the construction sector extend from buildings to neighbourhoods, cities and territory. This transition implies a Life Cycle Assessment (LCA) adaptation to efficiently treat such complex systems. Indeed, performing environmental performance evaluations has already been done over the past few years but the existing LCA tools have to be improved regarding their userfriendliness to allow everyday urban planning stakeholders to use them. Providing keys to help the practice is a main subject to spread the large scale LCA evaluation and ensure a better urban planning trending to sustainable solutions. This objective is also motivated by local, national and European policies, particularly within the context of Paris COP21. The aim of this study is to explore enhancement perspectives to facilitate LCA scaling up from building to territory. This work is based on observations from case studies underlining operational issues due to the evaluation time consumption. The urban planning process is analysed to focus, at different stages, on operational responses that could be proposed considering objectives, stakeholders’ needs and potential drivers. In particular, for early stage decision making, an approach introducing urban typo-morphologies has been adopted to facilitate the comparison of large scale evaluations and scenarios. Such typo-morphologies, representing elemental bricks at building or block scale to build neighbourhoods or larger, have been widely described in the past. However, this work concentrates on the applicability of the approach to integrate this sort of description for environmental evaluation based on a multicomponent (buildings, energy, water, public spaces, transportation) description of the systems. Particularly, a focus has to be given to scaling up mechanism. Expert systems sets on heuristic rules could help exploiting a typo-morphologies database. This solution should ease the practice of urban environmental assessments.
Communication au séminaire Chaire Gare, Gares et connexions, Séminaire organisé par la Chaire Gare en collaboration avec le PUCA et Gares et connexions, janvier 2016.
PCIM 2016 (International Exhibition and Conference for Power Electronics and Energy Management)
The energy consumption of urban railway stations is very large and ever increasing. To reduce the national electrical grid consumption, the first step is optimizing the equipment size and the second step is adding other available electrical sources like the train residual braking energy. Many of local energies productions use Direct Current (DC. The actual internal station grid is in Alternative Current (AC) but the majority of the equipment has an AC/DC converter to be supplied in DC. This paper describes the project led by Efficacity Institute, which addresses the use of additional existing energies and to develop a more adapted station grid to reducing the daily energy consumption peak. One Efficacity energetic concept aims to store the braking energy of the trains with a stationary electrical saving system. This energy is integrated to the power supply of a railway station thanks to a microgrid. First step of this microgrid are studied in this paper to develop the more adapted grid structure.