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Robadey Jacques

Professeur HES ordinaire

Hauptkompetenzen

Architecture des réseaux de télécom

Professeur HES ordinaire

Büro: HEIA_C10.11

Haute école d'ingénierie et d'architecture de Fribourg
Boulevard de Pérolles 80, 1700 Fribourg, CH

BA HES-SO en Architecture - Haute école d'ingénierie et d'architecture de Fribourg

Téléinformatique
Technique des télécommunications
Nouvelles architectures de réseaux
Conception de réseaux

Laufend

Ionic Liquid PCM for smart building applications

Rolle: Mitarbeiter

Financement: Smart Living Lab

Description du projet :

Smart buildings and the energy strategy 2050 are at the origin of an important demand for compact and demand-oriented thermal storage. One solution to meet these requirements is the use of new PCMs with on-demand activation and intelligent control of the heat&cold storage, charge and discharge processes. This means that new PCM must be developed together with a measurement system of their capacity and storage level.
In this project, we prepare novel sustainable phase change materials (PCM) based on ionic liquids (IL) from natural & renewable sources. These IL-PCMs are tested to the stage of an initial demonstrator and are designed to store & manage heat in smart buildings.

Forschungsteam innerhalb von HES-SO: Robadey Jacques

Durée du projet: 01.07.2019 - 30.04.2021

Montant global du projet: 90'850 CHF

Statut: Laufend

Réseau LORA pour les villes de Fribourg et Bulle

AGP

Rolle: Hauptgesuchsteller/in

Financement: Ville de Fribourg; Groupe e; FR - EIA - Institut iSIS; Morphean SA; Ville de Bulle; NPR; Ville de Fribourg; FRANIC SA; Gruyère Energie; WiFX

Description du projet : Les services de mobilité ont besoin d'une visibilité en direct du trafic routier et de ces effets néfastes au niveau des pollutions atmosphérique et sonore.

Forschungsteam innerhalb von HES-SO: Montet Frédéric , Robatel Vincent , Torche Pamela , Ayer Serge , Jourdan Matthieu , Robadey Jacques , Helfer Florian , Rime Simon , Huber Jan , Bapst Nicolas , Rapin Quentin , Camuglia Lucien , Vuilleumier Sylvain , Baeriswyl Ivan , Siow Ryan

Durée du projet: 01.05.2019 - 31.12.2025

Montant global du projet: 245'300 CHF

Statut: Laufend

PCM-based Solutions for building heating & Cooling INNOSUISSE N° 32485.1 IP-EE

Rolle: Hauptgesuchsteller/in

Financement: Innosuisse

Description du projet :

The real estate heating/cooling consuming 34% of the Swiss energy must be improved. The main issue is the refurbishment of old buildings. We propose to replace their heating with low-cost PCM heat exchangers that store heat and cold with available renewable energy and restore it when required.

Forschungsteam innerhalb von HES-SO: Robadey Jacques

Durée du projet: 01.01.2019 - 31.08.2021

Montant global du projet: 553'784 CHF

Statut: Laufend

Abgeschlossen

Symposium Energieinnovation, TU Graz, 2018

AGP

Rolle: Hauptgesuchsteller/in

Financement: FR - EIA - Institut ENERGY

Description du projet : Ce projet correspond au travail nécessaire pour l'écriture de la publication / proceedings de la conférence Energieinnovation à Graz, Autriche en 2018 ainsi que pour la participation à cette conférence et la mise en valeur ultérieure des résultats obtenus par le projet « Smart PCM Walls ». La mise en valeur de la publication peut être accompagné d'achat de matériel pour démontrer, visualiser les résultats pour des présentations des activités réalisées au sein de l'institut Energie avec des buts promotionnels.

Forschungsteam innerhalb von HES-SO: Gutknecht Esther , Selçukoglu Eyüp , Robadey Jacques , Bourrier Hervé

Durée du projet: 01.01.2018 - 31.12.2018

Montant global du projet: 3'000 CHF

Statut: Abgeschlossen

2022

THERMAL STORAGE AND HEAT DISCHARGE EFFICIENCY OF AN AIR-PCM-WATER HEAT EXCHANGER

Wissenschaftlicher Artikel

Robadey Jacques, Ruben Richard

Proceedings of EnInnov2022, 17. Symposium Energieinnovation, 16-18 Februar 2022, Graz, Austria, 2022 , pp. 1-2

Link zur Publikation

Zusammenfassung:

Reducing the use of fossil fuels is one of the biggest challenges of the current energy transition. Since thermal needs correspond to up to 80% of the building energy consumption, using solar energy to heat buildings could provide key improvements in energy efficiency. However, while PhotoVoltaic (PV) panels can provide a high average power, their power is too low during high thermal demands, which makes energy storage essential. We propose to use Phase Change Materials (PCM) [1, 2, 3, 4] to store thermal energy during periods of high solar power and reuse it when the renewable power becomes insufficient. As heat pumps have a high Coefficient of Performances (COP) for low temperature heating, the use of PCMs with a low fusion temperature is preferred. In that respect, we built new air-water heat exchangers containing PCM layers between both circuits, with fusion temperature between 23 and 25°C. In this document we report the measured storage capacity as well as the charge and discharge powers of such a PCM heat exchanger with dimensions of 0.8 x 0.5 x 0.25m.

2021

A LoRa Network for traffic monitoring in the cities of Fribourg and Bulle

Wissenschaftlicher Artikel

Eddy Mariéthoz, Robadey Jacques

FTAL 2021 Proceedings, 2021 , pp. 1-5

Link zur Publikation

Zusammenfassung:

The document describes a smart city project based on a LoRa communication network to
monitor road traffic, noise and air quality in the cities of Fribourg and Bulle. The network
planning and deployment and the first measurement results are presented.

Thermal energy autonomy study for a reference house equipped with PV panels, a heat pump and PCM storage elements

Wissenschaftlicher Artikel

Robadey Jacques

Journal of Physics: Conference Series, 2021 , vol. 2042, no 012147, pp. 1-6

Link zur Publikation

Zusammenfassung:

Despite their rapid growth, renewable energies cannot provide energy on demand, which is an essential requirement for heating buildings. To this end, we developed heat exchangers with Phase Change Materials that allow the on-demand charge, storage and discharge of thermal energy. In this paper we evaluate the storage capacities needed to achieve thermal energy autonomy. An existing reference house, meteorological data from MeteoSwiss and solar radiation intensity were used to evaluate the thermal needs and the solar power production for the year 2019. To heat the building an air-water heat pump is preferably powered by solar energy. The calculations have been performed from October to March. Using 1200 litres of PCM, a
thermal autonomy of 100% was achieved for March and October. In February, November and December, 24 days could not reach a thermal autonomy. For the month of January that was studied in detail 15 days are self-sufficient. By increasing the PCM volume to 2’600 litres 5 more days become self-sufficient. To achieve total building heating autonomy, seasonal storage is necessary.

2020

Le film de recherche comme modalité de production d’un discours scientifique en anthropologie de la santé

Wissenschaftlicher Artikel

Robadey Jacques, Démolis Rachel

Anthropologie et santé, 2020 , no 21

Link zur Publikation

Zusammenfassung:

Dans le cadre d’une recherche socio-anthropologique portant sur les usages médicamenteux des personnes âgées polymédiquées en Suisse, une anthropologue et une réalisatrice élaborent un film de recherche interrogeant le statut scientifique qu’il est possible d’attribuer aux films de recherche et engagent une réflexivité à deux voix sur les divers défis épistémologiques, techniques et déontologiques rencontrés. Cette démarche leur permet d’interroger l’apport d’une production filmique de recherche au champ anthropologique. La mise en présence des données audiovisuelles donne à voir le terrain dans toute son épaisseur, et permet également aux acteurs de l’étude de développer une nouvelle mise en récit, qui montre leur expertise. Elle est particulièrement significative pour l’analyse anthropologique dont la réflexion se façonne, lors de la réalisation de terrains, grâce à la mobilisation de l’intuition et de l’imagination ethnographique du/de la chercheur.e et ouvre l’échange entre pairs.

2018

Lower between-limb asymmetry during running on treadmill compared to overground in subjects with laterally pronounced knee osteoarthritis

Wissenschaftlicher Artikel ArODES

Jacques Robadey, Didier Staudenmann, Raphael Schween, Dominic Gehring, Albert Gollhofer, Wolfgang Taube

PLoS ONE,

Link zur Publikation

Zusammenfassung:

Subjects with knees osteoarthritis (KOA) show gait asymmetries evidenced by lower knee flexion and shorter contact times for the affected leg. Interestingly, running on a treadmill compared to running overground is also associated with lower knee flexion and shorter contact times. Thus, it is of particular interest how gait patterns are influenced by the type of ground in subjects with KOA. The aim of the current study was therefore to measure the overground asymmetry of kinematic parameters in KOA subjects while running and to investigate wether this asymmetry is altered on a treadmill. Nine patients diagnosed with KOA underwent overground and treadmill running with 3D-motion analysis. The symmetry analysis was performed using Symmetry Angles for five selected gait parameters: contact and step time, heel-toe delay, maximal knee flexion during stance and vertical speed variance. For all parameters, the values were significantly lower for the affected compared to the non-affected leg (p≤0.023). Post-hoc analyses revealed significant differences between legs only overground and not on the treadmill. The asymmetry was lower on the treadmill, as indicated by significant Symmetry Angle reductions for contact time (p=0.033), knee flexion (p=0.001) and vertical speed variance (p=0.002). The symmetry increase on the treadmill was mainly due to changes of the non-affected leg towards the affected leg values leading to smaller steps and less impact load in general. The present results suggest therfore taht a) an assessement of symmetry may differ depending on the ground type (treadmill versus overground) and b) treadmill running may be more suitable for patients with KOA gait asymmetries.

2022

Thermal storage and heat discharge efficiency of an air-PCM-water heat exchanger

Konferenz ArODES

Jacques Robadey, Ruben Richard

Proceedings of EnInnov2022, 17. Symposium Energieinnovation, 16-18 Februar 2022, Graz, Austria

Link zur Konferenz

2021

Thermal energy autonomy study for a reference house equipped with PV panels, a heat pump and PCM storage elements

Konferenz ArODES

Jacques Robadey, S. Vuilleumier, Elena-Lavinia Niederhäuser

Journal of Physics: Conference Series ; Proceedings of Carbon Neutral Cities - Energy Efficiency & Renewables in the Digital Era, CISBAT 2021, 8-10 September 2021, Lausanne, Switzerland

Link zur Konferenz

Zusammenfassung:

Despite their rapid growth, renewable energies cannot provide energy on demand, which is an essential requirement for heating buildings. To this end, we developed heat exchangers with Phase Change Materials that allow the on-demand charge, storage and discharge of thermal energy. In this paper we evaluate the storage capacities needed to achieve thermal energy autonomy. An existing reference house, meteorological data from MeteoSwiss and solar radiation intensity were used to evaluate the thermal needs and the solar power production for the year 2019. To heat the building an air-water heat pump is preferably powered by solar energy. The calculations have been performed from October to March. Using 1200 litres of PCM, a thermal autonomy of 100% was achieved for March and October. In February, November and December, 24 days could not reach a thermal autonomy. For the month of January that was studied in detail 15 days are self-sufficient. By increasing the PCM volume to 2'600 litres 5 more days become self-sufficient. To achieve total building heating autonomy, seasonal storage is necessary.

A LoRa network for traffic monitoring in the cities of Fribourg and Bulle

Konferenz ArODES

Eddy Mariéthoz, Jacques Robadey

Proceedings of FTAL Conference 2021 - Sustainable smart cities and regions, 28-29 October 2021, Lugano, Switzerland

Link zur Konferenz

Zusammenfassung:

This document describes a smart city project based on a LoRa communication network to monitor road traffic, noise and air quality in the cities of Fribourg and Bulle. The network planning and deployment and the first measurement results are presented.

Development of a lab demonstrator to test ionic liquids as phase change materials for energy storage

Konferenz ArODES

Caitlin Blum, Roger Marti, Jacques Robadey

Proceedings of FTAL Conference 2021 - Sustainable smart cities and regions, 28-29 October 2021, Lugano, Switzerland

Link zur Konferenz

Zusammenfassung:

Phase change materials (PCMs) are an innovative energy storage concept for buildings. Ionic liquids are a new class of such energy storage materials and we present here a lab-scale prototype for their testing and characterization. The design and construction of this lab-scale heat-exchanger and initial results for three newly developed ionic liquids in the prototype are presented, showing their promising PCM properties.

2020

Design and simulation of a new PCM heat exchanger for domestic hot water and air temperature control

Konferenz ArODES

Jacques Robadey, Simon Rime, Dominique Voide

Proceedings of the 12th Nordic Symposium on Building Physics, 6-9 September, Tallinn, Estonia

Link zur Konferenz

Zusammenfassung:

Based on previous experiences which have proven the efficiency of PCM heat exchangers for air temperature control, we designed and simulated new PCM heat exchanger structures made of multiple PCM layers sandwiched between loading and discharge layers. By circulating air or water in the discharge circuit, these heat exchangers can be used for heating air or water, respectively. For both use cases, a threedimensional analysis of the phase change and calculations of the charge/discharge powers were performed for the fusion and solidification processes. We obtained heating discharge powers ≥ 2.6 kW/m3 for 8 hours for air and ≥ 65 kW/m3 for 13 minutes for water with a respective total storage capacity of 28 kWh/m3 and 37 kWh/m3 . The heat extraction of air and water flows and their time dependence are discussed according to the percentage of liquid PCM and the temperature profile of the discharge flow inside the heat exchanger.

Building energy autonomy increase through thermal storage :

Konferenz ArODES

numerical and experimental analysis of PCM storage systems for hot water and air temperature control

Jacques Robadey, Dominique Voide, Simon Rime

Proceedings of 16. Symposium Energieinnovation (EnInnov2020), 12-14 Februar 2020, Graz, Austria

Link zur Konferenz

Zusammenfassung:

Thermal storage is one solution to efficiently use the renewable energy. In this paper we analyze the impact of thermal storage on the building heating and domestic hot water autonomy in the case of local renewable energy production. To be relevant, various building types have been investigated. We proposed earlier a PCM storage solution [1] that solved the efficient heat extraction challenge for building heating [2] [3]. In this paper, we present the first results of a PCM storage system for domestic hot water with measurements of discharge heating power in line with computational fluid dynamics simulations. A comparison of both heat storage systems is however not possible because of their different structures. In order to compare the efficiencies of the PCM discharge for hot water production and air temperature control, we have designed a new PCM heat exchanger that can be used in both cases. Its structure consists of several PCM layers sandwiched between loading and discharge layers. By circulating air or water in the discharge circuit, the heat exchanger can be used for heating air or water, respectively. For both use cases, a three-dimensional analysis of the phase change and calculations of the charge/discharge powers were performed for the fusion and solidification processes. We obtained heating discharge powers ≥ 2.6 kW/m3 for 8 hours for air and ≥ 65 kW/m3 for 13 minutes for water with a respective total storage capacity of 28 kWh/m3 and 37 kWh/m3 . The heat extraction of air and water flows and their time dependence are discussed according to the percentage of liquid PCM and the temperature profile of the discharge flow inside the heat exchanger.

2019

An innovative PCM storage system to enhance building energy autonomy :

Konferenz ArODES

experimental and numerical characterization

Jacques Robadey, Elena-Lavinia Niederhäuser

IOP Journal of Physics: Conference Series

Link zur Konferenz

2018

Numerical Analysis of an innovative PCM Storage System based on climatic data and experimental measurements

Konferenz

Robadey Jacques

ftal Conference 2018, 18.10.2018 - 19.10.2018, Lugano (TI), Switzerland

Link zur Konferenz

Numerical Analysis of an innovative PCM Storage System based on climatic data and experimental measurements

Konferenz ArODES

Jacques Robadey

Proceedings of Fachkonferenz Technik, Architektur und Life Sciences (FTAL) 2018, 18-19 October, Lugano (TI), Switzerland

Link zur Konferenz

Controlled active thermal storage in smart PCM walls for energy independent building applications

Konferenz ArODES

Richard Wegmueller, Gabriel Magnin, Jacques Robadey, Elena-Lavinia Niederhäuser

Proceedings of 2018 5th International Conference on Renewable Energy: Generation and Applications (ICREGA)

Link zur Konferenz

Zusammenfassung:

The use of renewable energy sources towards autonomous buildings is promising, not only for electrical energy generation but also for heating purposes. However, it presents one fundamental issue: the shift between energy production and heating energy demand. This paper presents a solution to this problem in the form of an optimized, thermally controlled storage using phase change materials integrated to building walls. In contrast to the standard applications of phase change materials, which are currently used to solely improve the thermal inertia of buildings, this paper introduces an active management of heat storage. In particular, it allows the heat energy discharge through the activation of forced convection on demand. A test bench was designed and manufactured. Measurements performed showed excellent agreements with simulated results.

Controlled active thermal storage in smart PCM walls for energy independent building applications

Konferenz ArODES

Richard Wegmueller, Jacques Robadey, Gabriel Magnin, Elena-Lavinia Niederhäuser

Proceedings of 5th International Conference on Renewable Energy : Generation and Applications 2018 (ICREGA), Al Ain, United Arab Emirates, 26-28 February

Link zur Konferenz

Zusammenfassung:

Thermal storage and discharge efficiency as a function of the PCM fusion temperature: simulations and experimental analysis

Konferenz ArODES

Jacques Robadey, Elena-Lavinia Niederhäuser

Proceedings of 15. Symposium Energieinnovation (EnInnov) 2018, 14-16. Februar, Graz, Austria

Link zur Konferenz

Zusammenfassung:

Despite their very promising building energy storage capabilities, PCM are still in the investigating phase before a large potential deployment. This is due to several challenges [1] such as high storage capacity and efficient heat extraction [2]. If the storage capacity can be adapted by implementing an appropriate quantity of PCM, the heat extraction efficiency is more delicate and difficult to optimize. It depends on the conductivity between the PCM surface and the indoor air and can be enhanced by ventilating the PCM surface.

Thermal storage and discharge efficiency as a function of the PCM phase change temperature :

Konferenz ArODES

simulations and experimental analysis

Jacques Robadey, Elena-Lavinia Niederhäuser, Antoine Boss, Gabriel Magnin, Richard Wegmüller

Proceedings of 15. Symposium Energieinnovation (EnInnov) 2018, 14-16. Februar, Graz, Austria

Link zur Konferenz

Zusammenfassung:

Despite their very promising building energy storage capabilities, PCM are still in the investigating phase before a large potential deployment. This is due to several challenges [1] such as high storage capacity and efficient heat extraction [2,3,4]. If the storage capcity can be adapted by implementing appropriate quantity of PCM, the heat extraction efficiency is more delicate and difficult to optimize. It depends on the conductivity of the PCM and on the heat flow between the PCM surface and the indoor air which can be enhanced by ventilating the PCM surface.

2017

Numerical and experimental characterization of an innovative PCM storage system

Konferenz ArODES

Jacques Robadey, Richard Wegmüller, Elena-Lavinia Niederhäuser

Proceedings of EMN Storage Meeting EMN, 14-18 August 2017, Milan, Italy

Link zur Konferenz

Zusammenfassung:

Despite their very promising building energy storage capabilities, PCM are still in the investigating phase before a large potential deployment. This is due to several challenges facing PCM [1] such as a high storage capacity, an efficient heat extraction [2] and the ability to drive the PCM charge and discharge as simply as for electrical batteries. We developed therefore a new concept to store an important amount of heat in isolated PCM walls and efficiently extract it as soon as required. We built in this context a 2x2x1m testbed, shown in Figure 1, with a hot water circuit charging the PCM wall and an internal ventilation to discharge it. As both processes are independently controlled, the system can be steered between its charge, storage and discharge modes. We performed measurements and simulations for a day cycle (Figure 2) with a loading phase in the afternoon, a storage phase overnight and a discharge phase in the morning. The afternoon loading can be supplied from local renewable energy and lead by that way to energy autonomous buildings. Thanks to ventilation, the “Lehmorange” PCM plates containing 5kg/m2 micronal (Tc=23°C) showed an efficient heat transfer with a room temperature increase of +5°C in 40 minutes. The simulations performed with IDAICE 4.7.1 also displayed of +5°C increase but slightly slower. Similarly, simulations performed for a reference building with heat transfer coefficient U=0.15 W/(m K) and without overnight heating showed a recovery of comfort temperature in less than one hour with the PCM discharge.

Errungenschaften

Suche

Robadey Jacques

Professeur HES ordinaire

Hauptkompetenzen

Réseaux de capteurs

Architecture des réseaux de télécom

Energétique du bâtiment

Internet des objets

Smart City

Biomécanique du sport

Professeur HES ordinaire