In addition to photovoltaics, solar thermal power stations are central to solar electricity generation. Over the past years, Fraunhofer ISE has performed research to optimize the components of such power stations and has carried out theoretical investigations on new concepts. In cooperation with industry and research partners, a new demonstration plant is being constructed under the direction of MAN Ferrostall Power Industry GmbH, whose goal it is to commercialize linear Fresnel collectors for use in solar thermal power stations.
Fraunhofer ISE presents concepts and components at the Stand of the Fraunhofer Alliance Energy at the Hanover Trade Fair this year from 16-20 April.
In conventional solar thermal power stations (parabolic trough system), sunlight is focused on a solar-selective absorber pipe by means of mirrors. The thermal oil flowing in the pipe is heated by the intense solar heat, and the resulting steam produced in the heat exchanger is converted to electricity by means of a turbine and generator. Both the classical parabolic trough system as well as the new concept of Fresnel systems with secondary mirrors are classified under linear concentrating systems. Particular to the Fresnel system are flat mirrors which are controlled as strings and track the sun. The solar radiation is focused on a central absorber pipe with a highly selective coating and which is situated above the reflector field. The components required for this system are, for the most part, inexpensive standard items. They are available world-wide, allowing a high local share of added value, which gives this technology an advantage over competitive technologies. In addition, Fresnel technology is not sensitive to wind loads and allows parallel land use to a large extent.
Fraunhofer ISE has contributed greatly in making the key components such as the absorber pipe, the secondary reflectors, primary reflector array and their control ready for operation. Based on theoretical investigations and the specific conditions found in sunny climates, Fraunhofer researchers have calculated that the electricity production costs will not rise above 0.12 €/kWh.
The next step is the technical verification under real operating conditions. For this purpose, a 100m long collector string is being constructed as a test and demonstration project at the Plataforma Solar de Almería in southern Spain. Both Fraunhofer ISE and the German Aerospace Center (DLR) are measuring the optical and thermal characteristics of the system. The industry partner MAN Ferrostaal Power Industry GmbH and Solar Power Group GmbH are in charge of the commercialization of this technology.
As well as the market introduction of Fresnel collector systems, the partners in Almeria have also made it their goal to develop new power plant concepts for the small and medium power range. In particular, these concepts aim to have a low investment risk and also to make use of combined heat, cooling and power plants. As a result, new markets open up for manufacturers of concentrating collectors and heat engines, especially in southern Europe, North Africa and the Middle East.
The construction of the power stations in Almeria is sponsored by the German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety. In the expert report "Welt im Wandel" put out by the Scientific Committee of the Federal German Government for Global Climate Change, the potential of renewable energies and their contribution to the future energy supply are reported. www.wbgu.deHanover Trade Fair, 16-20 April 2007
Energy hybrid: Battery meets super capacitor
01.12.2016 | Technische Universität Graz
Tailor-Made Membranes for the Environment
30.11.2016 | Forschungszentrum Jülich
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy