École Polytechnique Fédérale de Lausanne
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Telepresence : An Opportunity to Develop Real-World Experimentation in Education
No full textLASCI-STI-D
Advanced Control Strategy for Solar Combisystems
Get PDFSolar combisystems are solar heating installations providing space heating as well as domestic hot water for the inhabitants of the building. The energy sources are solar energy as well as an auxiliary source, gas or oil typically. This paper describes the advanced control strategy that enables the energetic optimization of the building and the combisystem as a whole. This strategy also aims at maximizing the degree of comfort in terms of temperature variation. It has been implemented on a solar combisystem manufactured in Switzerland. The strategy chosen is a predictive control strategy. It computes one-day optimal profiles for the flow-rate in the collector loop and for the power to be dissipated in the building. To do so, the dynamical models of the combisystem and of the building have been derived. Weather forecasts are also required to implement this predictive control strategy. The weather forecasts are provided on-line by the Swiss Meteorological Institute (SMI). To make this strategy robust with respect to modeling errors and discrepancies between weather forecasts and actual weather, a convenient closed-loop implementation of the optimal profiles has been developed. In addition to applying the optimal profiles computed for the flow rate in the collector loop and the power dissipated in the building, the tracking of optimal temperature profiles is also implemented. The proposed strategy has led to significant improvements in terms of energy savings and comfort and has proven to be very robust. It has been successfully implemented on a pilot plant and its commercialization is being carried out at the moment.LASCI-STI-D
Exploration of a Few Design Principles for Flexible Learning Approaches and Environments
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Run-to-run Adaptation of a Semi-Adiabatic Policy for the Optimization of an Industrial Batch Polymerization Process
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Collaborative Web-based Experimentation in Flexible Engineering Education
No full textThe Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland, is deploying a flexible learning scheme for selected pilot courses in engineering education. In such a scheme, traditional lectures and written exercises are combined with additional Web-based learning resources. The main objective of this initiative is to sustain the evolution from traditional teaching to active learning and to better integrate the increasing number of educational resources available online. In engineering education, a key activity to sustain the learning process is hands-on experimentation carried out using either simulation tools or real equipment. This paper describes how a collaborative Web-based experimentation environment has been introduced at the EPFL for providing more flexibility to students performing laboratory experiments in automatic control, biomechanics, and fluid mechanics. It particularly describes the eJournal, a Web service integrated in the proposed learning environment that enables the collection and sharing of preparatory notes and experimental results with both peers and teaching assistants.LASCI-STI-DGPrj_emersio
