The Flemish institute for technological research , is a research centre, located in Mol, Antwerp, Flanders, Belgium. The institute performs contract research and develops products and processes in the fields of energy, environment and materials, for both the public and the private sector. Dirk Fransaer is director of the institute. Wikipedia.
Flemish Institute for Technological Research | Date: 2015-03-26
A method and system that allows thermal energy to be supplied at different temperature levels to consumers, where each consumer is provided with its desired temperature whenever that is necessary. The method or a system for supplying consumers with heat energy or with cooling energy includes a set of three or more conduits for carrying a heat transfer fluid, each conduit carrying fluid at one of three or more different temperatures or temperature ranges, a plurality of heating and/or cooling consumer appliances distributed along the length of the conduits, each consumer appliance being linked to one of a plurality of pairs of conduits such that either: a consumer appliance is linked on a high temperature side, or a consumer appliance is linked on a low temperature side; a number of heat or cold generators, each pair of conduits being connected to at least one of the generators.
Somers B.,Flemish Institute for Technological Research |
Asner G.P.,Carnegie Institution for Science
Remote Sensing of Environment | Year: 2013
We evaluated the potential of a multi-temporal Multiple Endmember Spectral Mixture Analysis (MESMA) for invasive species mapping in Hawaiian rainforests. Earth Observing-1 Hyperion time series data were compiled in a single image cube and ingested into MESMA. While the temporal analysis provided a way to incorporate species phenology, a feature selection technique automatically identified the best time and best spectral feature set to optimize the separability among the native and invasive tree species in our study area. We initiated an alternative Separability Index (SI)-based feature selection approach in which a boundary condition reduced the amount of correlation in the selected spectral subset. We hypothesized that redundant spectral information could be avoided, and improved plant detection accuracy could be achieved, with reduced computational time due to the selection of fewer bands in the mixture analysis. Our analysis showed a systematic increase in the invasive species detection success when we compared the output of multi-temporal MESMA (Kappa=0.78) with that of the traditional unitemporal approach (Kappa=0.51-0.69). Even for unitemporal MESMA, in which only a single input image was used, the band selection strategy was beneficial both in plant detection accuracy and computational time. We could further demonstrate that, despite a lack of imagery covering all phenological events, a proper band selection strategy can emphasize subtle spectral and phenological differences between species and can thereby partly compensate for this lack of data. This creates opportunities for mapping in areas where cloud cover is a limiting factor for building extended spectral image time series. This approach is sufficiently general and inherently adaptive, thereby supporting species mapping using Hyperion and forthcoming space-borne imaging spectrometers. © 2013 Elsevier Inc.
de Ridder K.,Flemish Institute for Technological Research
Boundary-Layer Meteorology | Year: 2010
In the roughness sublayer (RSL), Monin-Obukhov surface layer similarity theory fails. This is problematic for atmospheric modelling applications over domains that include rough terrain such as forests or cities, since in these situations numerical models often have the lowest model level located within the RSL. Based on empirical RSL profile functions for momentum and scalar quantities, and scaling the height with the RSL height z*, we derive a simple bulk transfer relation that accounts for RSL effects. To verify the validity of our approach, these relations are employed together with wind speed and temperature profiles measured over boreal forest during the BOREAS experimental campaign to estimate momentum and heat fluxes. It is demonstrated that, when compared with observed flux values, the inclusion of RSL effects in the transfer relations yields a considerable improvement in the estimated fluxes. © Springer Science+Business Media B.V. 2009.
Flemish Institute for Technological Research | Date: 2013-05-08
The invention relates to a method for depositing functional groups on a surface of an object, and to the object treated as such, by generating and maintaining a plasma, bringing the object surface close to or in a space between the plasma electrodes, an atmosphere being present between the two electrodes, and depositing a plurality of functional groups on at least part of the surface of the object, whereby the atmosphere between the two electrodes comprises a multi-functional hyperbranched compound which is a polymer based on AB_(m) type monomers, or a derivative of such polymer, whereby m is at least 2, and A and B are two reactive functional groups selected such that group A is able to react at least m times with group B.
Flemish Institute for Technological Research | Date: 2015-03-24
A method for manufacturing a high ductility Ti-, Ti-alloy or NiTi-foam, meaning a compression strain higher than 10%, includes: preparing a powder suspension of a Ti-, NiTi- or Ti-alloy powder, bringing the said powder suspension into a desired form by gelcasting to form a green artefact. The method also includes a calcination step wherein the green artefact is calcined, and sintering the artifact. The calcination step includes a slow heating step wherein said green artefact is heated at a rate lower or equal to 20 C./hour to a temperature between 400 C. and 600 C. and the Ti-, NiTi- or Ti-alloy powder has a particle size less than 100 m. A high ductility Ti-, Ti-alloy or NiTi foam, with a compression higher than 10%, with a theoretical density less than 30%, pore size (cell size) between 50 to 1000 m can be obtained with such a method.
Flemish Institute for Technological Research | Date: 2015-11-25
A multi-stage heat engine such as a pump comprising an evaporator and a condenser; an expander section including more than two expander stages; a compressor section comprising more than two vapour compression stages that co-operate with the expander section; x tanks wherein x is at least three (e.g. T1 to Tx) for holding gaseous phases (e.g. G1 to Gx) and liquid phases (e.g. L1 to Lx) of a fluid; the expander section having x-1 expansion valves (e.g. V1 to Vx-1), the compressor section being adapted to compress the gaseous phase in the adjacent tank with a higher pressure to that in which expansion had occurred and move the compressed fluid to the next adjacent tank at a higher pressure, the expander section being adapted to expand a part of the compressed fluid (liquid) in each tank, through the expansion valve (V) of that tank, to expand the fluid in the adjacent tank at a lower pressure, the compressor and expander sections being adapted to output the gaseous phase at the highest pressure to the condenser and the liquid phase at the lowest pressure to the evaporator, the output of the condenser being fed back to tank (T1) at the highest pressure and the output of the evaporator being fed back to the tank (Tx) at the lowest pressure, wherein said multi-stage heat pump constitutes multiple evaporator-compressor-condenser-expander modules which are substantially identical to one another; a process for increasing the temperature of a medium, said process comprising the steps of: subjecting said medium to multiple evaporation-compression-condensation-expansion-cycles in said multi-stage heat pump; and the use of said multi-stage heat pump in the transformation of heat from renewable energy sources to higher temperatures.
Method For Distributing An Energy Flow Over A Predetermined Period Of Time To A Cluster Of A Plurality Of Devices Taking Into Account Constraints Relating To The Energy To Be Delivered To The Devices, A Computer Program For Performing Such A Method And A System Therefor
Flemish Institute for Technological Research | Date: 2016-11-16
Method for distributing an energy flow to a cluster of a plurality of devices taking into account constraints relating to the energy to be delivered to the devices, comprising the steps of:A. gathering flexibility information of the respective devices in the cluster,combining the flexibility information of the devices of the cluster into flexibility information for the cluster,B. determining accumulated energy to be delivered in function of time over the predetermined period of time,C. supplying the determined accumulated energy to the cluster by obtaining,from the flow of energy, power in function of time based on the determined accumulated energy to be delivered in function of time, determining priority for power for all devices in the cluster and distributing the obtained power among the devices of the cluster.
System For Distributing Electrical Energy Over A Cluster Of Electrical Devices, Method For Distributing Electrical Energy Over A Cluster Of Electrical Devices Of Such A System And Controller For Use In Such A System
Flemish Institute for Technological Research | Date: 2013-06-26
The system comprises a controller comprising software components for determining the difference between the amount of energy determined by the smart grid agent to be delivered to and from the cluster over a predetermined period of time and the amount of energy measured by the meter actually delivered to the cluster over the predetermined period of time, the controller comprising software components for simulating a virtual smart grid participating device based on the determined difference and for providing the smart grid agent with information based on the determined difference such that the smart grid agent is configured to determine the amount of electrical energy in function of time to be delivered to and from the electrical grid for both the smart grid participating and non-participating devices of the cluster based on information of both the devices of the cluster and the smart grid and such that the difference is reduced.
Flemish Institute for Technological Research | Date: 2015-11-18
A disconnection device (10) for electrically disconnecting an electrical appliance (8) from an electrode pair (1, 2) comprises an electrically isolating holder (11) between the electrode pair (1, 2). The holder comprises an electrically conductive substance (5) disconnectable from the electrode pair (1, 2) under gravity forces.
Flemish Institute for Technological Research | Date: 2013-07-24
Demand response adaptor provided such that, depending on the device connected to the demand response adapter, the demand response control system can be provided with the second constraints corresponding to the device connected to the demand response adapter, wherein the demand response control system comprises software components for making the decision based on the first constraints, the second constraints and the third constraints, wherein the controller (5) comprises software components for detecting the start of a program by analyzing the amount of electrical power used by the device in function of time detected by the sensor (6) and wherein the controller (5) of the adaptor comprises software components for switching the relay (4) to the nonconductive state when the start of the program is detected until, based on the decision of the demand response control system, the controller (5) switches the relay switch (4) to the conductive state.