In Almería in southern Spain, the German Aerospace Center (DLR) has been testing new technologies for solar power plants, for example for heat transport, for several years. In one project, two large, gasometer-like containers December 2018 Calendar To Print are filled with a molten salt. In the first container, the liquid salt is 200 degrees Celsius, in the second 400 degrees. The heating from 200 to 400 degrees takes over thermal oil, which in turn gets the necessary energy from the sun in large parabolic mirrors.
December 2018 Calendar To Print
If electricity is to be generated, the 400-degree melt flows into a heat exchanger and heats water there. The high pressure steam then drives the turbine and the power generator in a conventional way. The melt itself cools to 200 degrees, flows back into the first tank. The cycle can start again. The upstream solar thermal system ensures that the electricity produced is climate-neutral. Even coal-fired power plants ultimately only generate their electricity from highly concentrated heat – but this is provided by CO2-intensive combustion.
If one were to replace this climate-damaging heat generation with a “green one”, one could continue to operate the power plant largely decarbonised and would not have to shut down the site for reasons of climate protection. That would be a kind of gentle Kohlaususstieg.Die pursued the researcher André Thess for some time. “The technology in Almería is in place and has been tested industrially and only needs to be transferred from the already existing solar power plant to a coal-fired power plant – but nobody has done that yet.
” Thess, Director of the DLR Institute of Technical Thermodynamics in Stuttgart, keeps the conversion of coal-fired power plants For green heat worldwide. Because still new coal plants are built. At present, 1,400 new plants are being planned in more than 50 countries, the environmental organization Urgewald recently discovered. Retrofitting to a Least Least Many plants that are now going online will experience the year 2050 – if the world is largely carbon dioxide according to climate scientists -neutral must develop.
“Humankind is to move away from coal-fired power generation by 2050. So it’s completely illusory to believe that thousands of coal-fired power plants around the world can be replaced by a completely new infrastructure,” says Thess, describing the dilemma It is possible to simply shut down all coal plants – in the view of the DLR researcher, however, this can only be afforded by a rich nation such as Germany.
“Countries like India or China, where per capita economic output makes up only a small part of the German population, can not do that without questioning their social achievements in recent years,” says Thess. That’s why the DLR researcher does The question is how to decarbonise the global coal power that still exists for decades.
One way would be to increase the efficiency of the plants. But that has physical and financial limits, emphasizes Thess. More effectively, he was convinced that coal-fired power plants could be decarbonised by December 2018 Calendar To Print equipping them with renewable heat-supplied heat. This could draw their energy from solar thermal energy, as in Almería, but also from “green” gas produced by wind power.