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161026 1 Uhlandschule
News 26.10.2016

Learning and working in an energy-plus school

Uhland School in Stuttgart, which dates back to the 1950s, no longer accorded with today's structural and energetic standards. The renovation work is now almost complete and the City of Stuttgart is getting its first energy-plus school. A photovoltaic system on the roof and façade of the building covers the electricity requirement.  more...
 
Projekt 1016 engl 00
Projektinfo 10/2016

Fuel cell generates electricity and heat for homes

Highly efficient, low-emission and quiet: as small-scale combined-heat-and-power stations, new fuel cell heating units produce heat energy and electrical energy with an efficiency of over 90 per cent. They have proven themselves in extensive tests in single and two-family homes, and their operation and design have been improved incrementally. The first units are now on the market. They run on natural gas, and on hydrogen and methane produced using renewable energy or biomass. Decentralised fuel cells can generate demand-oriented electricity, and they can be used in a grid-friendly or grid-independent way.  more...
 
161117 1 Lidarsystem Zugangsplattform hohe-Messreichweite c Joerge Schneemann-For Wind

It's turbulent offshore

In offshore wind farms, the front turbines receive the most wind. They cause kilometre-long vortexes with slower wind and increased turbulence, which affects the downstream wind turbines. Previous methods that mimic such wakes are inaccurate or require considerable computation. In order to better understand these wake effects, scientists have therefore developed a new model and software to help optimise farms.  more...
 
161102 1 Turmkraftwerk Gemsolar c Beyond Coaland Gas-Flickr

Solar thermal and photovoltaic power plants in comparison

How will the market for photovoltaic and solar thermal power plants develop in the coming decades? Which technology is economically more efficient? And what opportunities are offered by combined power plant systems in sunny regions? A study carried out by the German Aerospace Centre (DLR) has investigated the development of these power plants until 2030.  more...
 
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Processing and recycling titanium waste

Titanium components account for up to 15 per cent of the total weight of modern aircraft. The material is light and very stable. However, up to 95 per cent of the original titanium is left over as waste chips during the entire manufacturing process. These are contaminated and until now it has not been possible to recycle them so that they are suitable for reuse in aircraft construction. Scientists have therefore developed a method that can process and recycle titanium chips with high purity.  more...
 
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Projektinfo 14/2016

Steel pistons for more efficient diesel engines

With a new cooling concept, an automotive industry supplier is expanding the range of applications for steel pistons in diesel engines. The Stuttgart-based company is testing a liquid alloy comprising sodium and potassium, which dissipates heat from the particularly thermally loaded piston head. This innovative steel piston concept is designed to enable even further increases in the specific power of car diesel engines. In the case of long-running engines for industrial applications and commercial vehicles, the component and engine oil load is significantly reduced while the expected service life and oil change intervals are prolonged.  more...
 
160811 1 thermoelektrischemodulefertigung72dpi2000px
News 11.08.2016

Pilot production of thermoelectric modules

Thermoelectric generators convert waste heat directly into electricity. They utilise temperature differences and are paving the way for more energy-efficient production processes. However, the technology has previously led a niche existence because the module production is labour-intensive and therefore expensive. Researchers from Freiburg now want to improve this.  more...
 
160726 1 Metallhydride IFAM
News 26.07.2016

Hydrogen – storing energy in metals

Metal hydrides store hydrogen and heat. Their use in thermochemical storage systems is hampered, however, by the material's poor heat conductivity. To increase the charging and discharging performance, researchers are pelletising the material together with graphite, which has a high thermal conductivity. With different metal hydrides they can cover the temperature range from room temperature up to 400 degrees Celsius.  more...
 
161010 1 Rohrreaktor c DBIFreiberg
News 10.10.2016

Storing surplus electricity in the natural gas network

Surplus electricity can be used in Power-to-Gas systems to generate hydrogen by means of electrolysis. Downstream methanation provides a possibility for storing the remaining gas that cannot be directly used or fed into the natural gas network. The initial, highly promising results for a newly developed biological process have now been presented. The test facility has a low energy requirement and the process is continuous. The system is suitable for decentralised and small systems.  more...
 
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The hotline in the grid

The electricity grid that has been used for decades reaches its limits when transporting increasing amounts of electricity over long distances. There are already limiting bottlenecks. One way to integrate more wind and solar power into the grid is provided by overhead lines with a higher maximum temperature. These can transport more electricity, enabling grid congestion to be avoided. One problem, though, is that metals expand more at high temperatures. As a result the line lengthens and sags more. However, special high-temperature conductors can provide a remedy here.  more...
 

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Popular articles

Temperature firmness of overhead lines
The hotline in the grid
Efficiency study on solar power generation
Solar thermal and photovoltaic power plants in comparison
Long-term measurements on a 200-metre-high met mast near Kassel
Measuring wind potential in low mountain ranges
Application of renewable heating and cooling systems
Using geothermal energy in office buildings