Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Laser Technology Improves Solar Collectors

30.10.2009
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 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.

Contact:
Laser Zentrum Hannover e.V.
Michael Botts
Hollerithallee 8
D-30419 Hannover
Germany Tel.: +49 511 2788-151
Fax: +49 511 2788-100
E-Mail: m.botts@lzh.de
The Laser Zentrum Hannover e.V. (LZH) carries out research and development in the field of laser technology and is supported by the Ministry of Economic Affairs, Labour and Transport of the State of Lower Saxony (Niedersächsisches Ministerium für Wirtschaft, Arbeit und Verkehr).

Michael Botts | idw
Further information:
http://www.laser-zentrum-hannover.de/en/
http://www.lzh.de

More articles from Power and Electrical Engineering:

nachricht System draws power from daily temperature swings
16.02.2018 | Massachusetts Institute of Technology

nachricht Researchers at Kiel University develop extremely sensitive sensor system for magnetic fields
15.02.2018 | Christian-Albrechts-Universität zu Kiel

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

Im Focus: Autonomous 3D scanner supports individual manufacturing processes

Let’s say the armrest is broken in your vintage car. As things stand, you would need a lot of luck and persistence to find the right spare part. But in the world of Industrie 4.0 and production with batch sizes of one, you can simply scan the armrest and print it out. This is made possible by the first ever 3D scanner capable of working autonomously and in real time. The autonomous scanning system will be on display at the Hannover Messe Preview on February 6 and at the Hannover Messe proper from April 23 to 27, 2018 (Hall 6, Booth A30).

Part of the charm of vintage cars is that they stopped making them long ago, so it is special when you do see one out on the roads. If something breaks or...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Fingerprints of quantum entanglement

16.02.2018 | Information Technology

'Living bandages': NUST MISIS scientists develop biocompatible anti-burn nanofibers

16.02.2018 | Health and Medicine

Hubble sees Neptune's mysterious shrinking storm

16.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>