The sun is the energy source not only done for photovoltaic cells but also for thermal solar collectors. Whereas photovoltaic cells transform the sun's energy directly into electricity, solar collectors use a liquid which is heated by solar radiation. The thermal energy won during this process can be used for heating water in homes or in larger units for driving power generators.
In the heart of larger units are glass tubes filled with a liquid, which is heated by solar radiation. These glass tubes must be joined together, and according to the Laser Zentrum Hannover e.V. (LZH), laser technology is best suitable for this process. A new project between the LZH and several industrial partners aims at proving that laser joining of glass tubes has many advantages over the conventional flame method, and that it is more cost-efficient for the glass industry.The disadvantages of the conventional flame technique can partly be compensated by trained staff, but it can also lead to product failure. During the joining process, impurities may occur in the joining zone, which cause considerable variations in the glass quality. Also, the heat input is difficult to regulate when using the flame technique. This is not the case with laser technology.
The advantages of laser joining of glass tubes are mainly temperature control, temperature distribution and in the automation. Additionally, in contrast to the flame joining, the laser joining technique prevents condensation and deposition in the glass tube, thus offering better quality. In combination with chemical resistant and robust borosilicate glass, breakage is significantly reduced, which in turn leads to a considerably lower reject rate.
The new system is a solid basis and starting point for all project partners and all the connected industrial branches in finding new application areas. This is the foundation for profitable industrial use.
The project "Lafuelsol" is funded by the German Federal Ministry of Education and Research (BMBF). The project organization is carried out by the Karlsruhe Institute of Technology, division Production and Manufacturing Technologies.
Researchers use light to remotely control curvature of plastics
23.03.2017 | North Carolina State University
TU Graz researchers show that enzyme function inhibits battery ageing
21.03.2017 | Technische Universität Graz
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
24.03.2017 | Materials Sciences
24.03.2017 | Physics and Astronomy
24.03.2017 | Physics and Astronomy