Schukey motor

from Wikipedia, the free encyclopedia

A Schukey motor is a rotary piston machine that is designed as a heat engine and refrigeration machine . With their help, cooling without (chemical) refrigerants is possible; (ambient) air is used as the medium for heat transport.

development

Schukey motor drawing from US Patent 3,978,680 (color coded)

In the first half of the 1970s, the trained toolmaker Jürgen Schukey (1940–2011) applied for and received patents for an apparatus he called an action machine . His corresponding patent for the United States names the device as a heat engine . More than ten years later, Schukey followed up with patents, the content of which is a thermodynamic cycle , a rotary piston machine, and a heat exchanger based on the counterflow principle .

In 1993, BMW and Opel withdrew from the development of the Schukey engine, in which they had previously participated.

Towards the end of the 1990s, Schukey put another patent on the rotary piston machine. The patent (or the additional dependent) is actually not a patent, but a utility model. The property rights were not pursued; they are now extinguished.

A research project at the Hanover University of Applied Sciences began in 2010 to bring the Schukey motor to series production, which was completed on schedule. In June 2010, the commissioning of large Schukey motors to utilize waste heat was announced in the same year. In July 2010 there were two Schukey motors that had been operated on a test bench for a few hundred hours . In 2010, Volkswagen AG briefly dealt with this technology. The German Federal Environment Agency is of the opinion that the chemical industry is putting pressure on the automotive industry to ignore the Schukey motor and continue to buy refrigerants. Under the direction of the Federal Environment Agency, the Schukey motor received funding from the European Union .

Thermodyna Maschinen und Anlagen GmbH is currently working on developing products ready for series production.

technology

The design uses fewer components than a conventional air conditioner, while promising less weight, lower costs and low maintenance. The machine should also be very efficient thanks to its high degree of efficiency .

The Schukey motor works on the same thermodynamic principle as more common refrigeration machines, for example in a refrigerator , but without refrigerant. Two interlocking rotors , which assume different angles of rotation in the course of one revolution, compress and expand the air in several chambers at the same time. For example, when used in an automobile, the cooled air can be released directly into the vehicle interior - a separate heat exchanger is then not necessary.

The Schukey motor can also be used in an Organic Rankine Cycle (ORC) process. Waste heat in a temperature range of up to 350 ° C and a pressure level of up to 10 bar can be converted into electrical energy via a connected generator.

One use is e.g. B. in motor vehicles, combined heat and power plants , solar thermal power plants and for the use of waste heat from marine diesel engines.

Working principle

The Schukey motor is of the cat-and-mouse type. The name comes from the two interlocking rotors, whereby one rotor approaches the other in the direction of rotation before the other runs away in the direction of rotation, which is repeated periodically. The changes in the rotational speed required for this are achieved by means of a gear unit via which the rotors are connected to one another. The rotors enclose a working space between them, the volume of which changes periodically and which at the same time revolves around the rotation axis of the rotors. It is now not difficult to z. B. to imagine a four-stroke cycle between the two rotary pistons, in which the working space increases and decreases its volume twice during one cycle (Kauertz machine). The necessary inlets and outlets are let into the housing so that they can always be reached at the right time from the surrounding work area.

Schukey's concept is a generalization of the Kauertz engine to an external combustion engine (however, only Poirmeur, Kolko and Dedieu are cited in the US patent). The working medium is first compressed in the working area. Then the working space reaches an outlet through which the medium is led to a heat source (heat exchanger). When heated, its volume increases. It is then passed back into the working space at another point on the circumference, the volume of which then increases, with the expanding medium doing work. When the distance between the two rotors is greatest, the working area reaches an outlet opening, and the decreasing working area pushes the medium out and into a heat exchanger, which cools it down. It now flows back into a work area where it is compressed, so that the process starts all over again.

Web links

Commons : Schukey Motor  - Collection of Images, Videos and Audio Files

Individual evidence

  1. ↑ http://www.thermodyna.com/kaelte-klima.html
  2. ↑ Thermondyna: Jürgen Schukey
  3. ↑ DE2360865 (A1) - Action machine . European Patent Office . Retrieved December 16, 2012.
  4. ↑ US3978680 (A) - Heat Engine . European Patent Office. Retrieved December 16, 2012.
  5. ↑ EP0309467 (B1) - Thermodynamic Cycle . European Patent Office. Retrieved December 16, 2012.
  6. ↑ EP0316346 (B1) - Rotating Piston Machine . European Patent Office. Retrieved December 16, 2012.
  7. ↑ EP0386131 (B1) - Countercurrent Heat Exchanger . European Patent Office. Retrieved December 16, 2012.
  8. ↑ a b c This machine produces cold - only with air . The world . June 19, 2010. Retrieved December 16, 2012.
  9. ↑ EP0945592 (A1) - Rotary Piston Machine . European Patent Office. Retrieved December 16, 2012.
  10. ↑ 1 . Retrieved October 10, 2014.
  11. ↑ 2 . Retrieved October 10, 2014.
  12. ↑ Development of Schukey technology ready for series production . University of Hanover. Retrieved August 19, 2014.
  13. ↑ Volker Bergholter: Market launch of the Schukey technology (PDF; 6.58 MB) Federal Environment Agency. S. July 22, 2010. Retrieved December 16, 2012.
  14. ^ A b Jürgen Pander: Revolutionary air conditioning: Really cool . Spiegel Online . December 14, 2012. Retrieved December 16, 2012.
  15. ↑ Schukey - power and cooling from waste or solar heat . Federal Environment Agency. Retrieved December 16, 2012.
  16. ↑ website . Thermodyna Maschinen und Anlagen GmbH. Retrieved August 9, 2013.
  17. ↑ "Schukey technology revolutionizes thermodynamics" ( http://www.energie-experten.org/experte/meldung-verbindungen/news/schukey-technik-revolutioniert-thermodynamik-4074.html )
  18. ↑ "Unusual Internal Combustion Engines (English)" ( http://www.aqpl43.dsl.pipex.com/MUSEUM/POWER/unusualICeng/unusualICeng.htm )
  19. ↑ "Kauertz machine (English)" ( http://www.aqpl43.dsl.pipex.com/MUSEUM/POWER/unusualICeng/cat&mouse/cat&mouse.htm )
  20. ↑ "US1458950 A" ( http://www.google.com.ag/patents/US1458950 )