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François Maréchal

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Related publications (437)

Defining density and land uses under energy performance targets at the early stage of urban planning processes

François Maréchal, Nils Christian Schüler, Shanshan Hsieh, Arno Schlueter

The energy demand of cities is highly influenced by urban planning parameters such as urban density and land use. These parameters are mostly determined during early stages of planning. The effects of these parameters on the energy performance of districts ...

Elsevier2017

Novel district heating and cooling energy network using CO2 as a heat and mass transfer fluid

Daniel Favrat, Luc Girardin, François Maréchal, Samuel Henchoz

Compact district energy networks in a temperature range of 10 to 16°C have a great potential for energy savings by providing a heat source for decentralized heating heat pumps, a cold source for air-conditioning and a heat sink for refrigeration or cogener ...

2017

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

The swiss potential of model predictive control for building energy systems

Luc Girardin, François Maréchal, Paul Michael Stadler

This paper presents a preliminary assessment of the potential economic benefit resulting from the use of smart energy management systems in buildings. The proposed approach relies on the application of model predictive control (MPC) and a self-consumption ...

Institute of Electrical and Electronics Engineers Inc.2017

Energy integration on a gasoline engine for a vehicular application

François Maréchal, Zlatina Kirilova Dimitrova

The internal combustion engines are the most applied energy converters in the passenger cars. In order to increase their efficiency, energy integration techniques are used to recover the waste heat. An adapted methodology is required to design the ORC as a ...

2017

A Hybrid Methodology for Combined Interplant Heat, Water, and Power Integration

François Maréchal, Maziar Kermani, Anna Sophia Wallerand, Ivan Daniel Kantor

The growing desire to improve resource efficiency and environmental impact of industrial processes is directly linked to optimal management of heat, mass and power flows. The concept of industrial symbiosis tackles this issue by proposing interplant heat r ...

Elsevier science2017

Multicriteria Decisions in Urban Energy System Planning: A Review

François Maréchal, Sébastien Cajot

Urban energy system planning (UESP) is a topic of growing concern for cities in deregulated energy markets, which plan to decrease energy demand, reduce their dependency on fossil fuels, and increase the share of renewable energy sources. UESP being a high ...

2017

Interactive optimization for the planning of urban systems

François Maréchal, Sébastien Cajot, Nils Christian Schüler

This paper introduces urb.io, an interactive optimization framework for early-stage urban planning. It allows urban planners to generate and explore many alternative urban configurations, while focusing their attention on the most promising ones. First, ad ...

Elsevier2017

A general superstructure for the optimal synthesis and design of power and inverse Rankine cycles, 27th European Symposium on Computer Aided Process Engineering

François Maréchal, Alberto Mian, Emanuele Martelli

This work presents a very general superstructure capable of reproducing any configuration of Rankine cycles, both power cycles (steam cycles we well as Organic Rankine Cycles) and inverse cycles (refrigeration cycles or heat pumps), as well as heat/steam d ...

Elsevier Science2017

Simultaneous optimisation of Multiple-Effect Evaporation Systems and Heat Exchanger Network

François Maréchal, Maziar Kermani

In recent work, a general superstructure and a Non-Linear Programming (NLP) model were presented for Multiple-Effect Evaporation Systems (MEESs). This NLP model was combined with a Heat Exchanger Network (HEN) model in order to simultaneously perform optim ...

2017

Synthesis of single and interplant non-isothermal water networks

François Maréchal, Maziar Kermani

This paper addresses the synthesis problem of non-isothermal water networks using a mathematical programming approach. A heat-integrated water network superstructure and its corresponding mixed integer nonlinear programming (MINLP) model is proposed for th ...

2017

Virtual Sector Profiles for Innovation Sharing in Process Industry – Sector 01: Chemicals

François Maréchal, Laurent Gabriel Félix Alexandre Stéphane Bungener, Elfie Marie Méchaussie, Greta Martha Van Eetvelde, Ivan Daniel Kantor

Production data in process industry are proprietary to a company since they are key to the process design and technology expertise. However, data confidentiality restrains industry from sharing results and advancing developments in and across process secto ...

Springer International Publishing2017

Energy Integration On Multi-Periods For Vehicle Thermal Powertrains

François Maréchal, Zlatina Kirilova Dimitrova

Internal combustion engines are the most applied energy converters in passenger cars. In order to increase their efficiency, energy integration techniques are used to recover waste heat. An adapted methodology is required to design the organic Rankine cycl ...

Wiley-Blackwell2017

Feasibility study of a CO2-based system in NEST

Luc Girardin, François Maréchal, Raluca-Ancuta Suciu

The NEST building laboratory of Empa and Eawag is a modular research and innovation demonstrator where new technologies, materials and systems are tested, researched, honed and validated in realistic conditions. In the NEST concept, only the supporting str ...

Industrial Process and Energy Systems Engineering Group, EPFL Valais Wallis2017

Combined Exergy Analysis and Energy Integration for the Optimization of Nitrogen Fertilizer Plants

François Maréchal, Shivom Sharma, Daniel Alexander Florez Orrego

Modern ammonia production plants are equipped with efficient energy integration networks able to recover an important fraction of the enthalpy of reaction released by the exothermic chemical systems. However, to fully supply the exergy demands of the highl ...

University of San Diego2017

Optimal use of biomass in large-scale energy systems: insights for energy policy

François Maréchal, Emanuela Peduzzi, Victor Codina Gironès, Stefano Moret, Marco Nasato

Biomass chemical conversion processes allow the production of solid, liquid and gaseous biofuels, which can substitute almost any kind of fossil fuel and the associated greenhouse gas emissions. Despite this potential, high investment costs and conversion ...

2017

Multi-objective Optimization of Supercritical Water Gasification of Leftover Brazilian Ginseng Roots After Phytochemical Recovery Steps

François Maréchal, Alberto Mian, Adriano Viana Ensinas, Diego Tresinari dos Santos, Juliana Queiroz Albarelli

The present study aims at studying the supercritical water gasification (SCWG) of the leftover Brazilian ginseng roots after phytochemicals extraction for synthetic natural gas (SNG) production, envisioning the development of a promising Brazilian ginseng ...

2017

SCCER-FURIES - Report on the role of multi-carrier, multi-services, multi-grids integrated energy conversion systems and their possible role in the Swiss energy 2050 - Deliverable D1.5.3

Luc Girardin, François Maréchal, Paul Michael Stadler

The optimisation of distributed and renewable energy systems in buildings has shown that zero energy systems, using existing technologies, is within reach in the household sector where the thermal and the systems can support each other to increase renewabl ...

2017

A novel MILP approach for simultaneous optimization of water and energy: Application to a Canadian softwood Kraft pulping mill

François Maréchal, Zoé Périn-Levasseur, Maziar Kermani

An optimization methodology based on Mixed Integer Linear Programming (MILP) has been developed for simultaneous optimization of water and energy (SOWE) in industrial processes. The superstructure integrates non-water process thermal streams and optimizes ...

2017

Energy Integration on a Gasoline Engine for Efficiency Improvement

François Maréchal, Zlatina Kirilova Dimitrova

2017

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