Fraunhofer ISE Presents New Research Results at the Berlin ENERGY DAYS
The Fraunhofer Institute for Solar Energy Systems ISE presents its newest results on grid-supportive buildings and urban quarters at the Berlin ENERGY DAYS on April 12, 2016. Prof. Dr. Hans-Martin Henning, deputy director of Fraunhofer ISE, will give a talk demonstrating how building mass and technical storage help to smooth out the fluctuations from renewable energy. This presentation is part of a workshop, organized by Fraunhofer ISE, Fraunhofer IBP and RWTH Aachen.
More information about the workshop can be found under the following link: http://www.energietage.de/details/va/2016-504.html
The number of renewable energy installations continues to expand worldwide. In Germany the installed power of wind and photovoltaics increased from 54 GW in 2011 up to 83 GW in 2014/15, a value equivalent to the peak load in the German electricity grid.
With an increasing share of renewables in the energy supply, times occur when there is a surplus of renewable electricity, but also when peak load power plants, fired by fossil fuels with high emissions, are needed to produce electricity. Since electricity is difficult to store, the best case is to maintain the balance between electricity production and consumption. There are several options for flexibility such as demand-side operation of conventional power plants and CHP systems; load management where consumers in households, businesses and industry are temporarily shut-down; short term storage; and, as a measure in the medium to long term, the production of synthetic chemical energy carriers (Power-to-Gas/Power-to-Liquid) using surplus renewable electricity.
When the total building performance conforms to the targeted load management goals, the building is called “grid-supportive.” “We are researching three basic approaches to increase the grid-supporting capacity of buildings,” says Dr. Doreen Kalz, group head of Building Analysis and Energy Concepts at Fraunhofer ISE. “Firstly, one can switch between different heating and cooling supplies, e. g. between an electric heat pump and a gas-fired condensing boiler.
The second approach uses energy storage technologies such as battery storage or thermal heat storage. At times of surplus electricity, for example, an electric heat pump can be used to produce heat which is sent to a buffer storage tank. In the third approach, the surplus heat or cold is stored in the thermal mass of the building itself, whereby the massive building components are thermally activated by so-called “Thermally Active Building Component Systems,” or TABS.
In order to compare the grid-supporting properties of different buildings, the researchers developed two parameters: an absolute and a relative Grid Support Coefficient (GSCabs and GSCrel). The GSCabs weighs the electricity consumption with a grid-based reference parameter, i. e. an electricity price signal. The GSCrel translates this amount to a scale of -100 (worst case) to +100 (best case) which indicates the present potential for optimization.
An evaluation of 52 existing plants showed that the majority of systems today operate with either a negative or neutral impact on the grid. For two systems that were analyzed in more detail, the grid-support factor could be increased to a value of +70 by implementing a new control strategy that considers the electricity price on the EEX electricity market.
In the workshop taking place at the Berlin ENERGY DAYS, the results from four years of research in the “Netzreaktive Gebäude” project (Grid-supportive buildings) will be presented. The project was supported by the German Federal Ministry for Economic Affairs and Energy (BMWi). Project partners are the Fraunhofer Institute for Solar Energy Systems ISE, the Fraunhofer Institute for Building Physics IBP in Kassel and the E.ON Energy Research Center of RWTH Aachen.
The researchers conclude: To achieve grid-supportive operation, it is important to initially define one’s individual goal: for example, high revenues from electricity sales, provision of standby energy, ease the burden of the distribution grid or increase the percentage of renewables in the fulfillment of demand.
Grid-support does not stop at buildings: Urban quarters, city districts and regions can also be of service to the grid. Ultimately grid-support is a Europe-wide issue that is being addressed by the International Energy Agency IEA in the Working Group Annex 67. At Fraunhofer ISE, the work on this topic is being continued in the new “FlexControl” project, also sponsored by the federal ministry BMWi. The new project makes a contribution towards ensuring that a stable electricity grid and the continual growth of renewable energy capacity go hand in hand.
The study “What Will the Energy Transformation Cost? Pathways for Transforming the German Energy System by 2050”: https://www.ise.fraunhofer.de/en/publications/studies/what-will-the-energy-trans...
Project “Netzreaktive Gebäude” (Grid-supportive buildings): http://www.netzreaktivegebaeude.de/ (only in German)
ANNEX67: Energy Flexible Buildings: http://www.iea-ebc.org/projects/ongoing-projects/ebc-annex-67/
Karin Schneider | Fraunhofer-Institut für Solare Energiesysteme ISE
12V, 48V, high-voltage – trends in E/E automotive architecture
10.01.2017 | Haus der Technik e.V.
2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover
09.01.2017 | Technische Informationsbibliothek (TIB)
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration
"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...
Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.
Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
16.01.2017 | Power and Electrical Engineering
16.01.2017 | Information Technology
16.01.2017 | Power and Electrical Engineering