Dynamic pressure machine
A dynamic pressure machine is used to generate electrical energy from water power while at the same time regulating a certain water level of the inflow.
Layout and function
The way the dynamic pressure machine works, which is reminiscent of a conventional water wheel, is based on the hydrostatic principle. The dynamic pressure machine consists of an impeller with a connected generator . The impeller is designed in such a way that it almost completely closes the channel with its hub and the lower blades apart from a narrow gap. By braking the impeller, it is therefore possible to block the inflow. Braking is done by a generator, which converts the braking energy into electrical power.
Adolf Brinnich (1939–2008) filed a patent application for the principle of the dynamic pressure machine in Austria .
Only a small difference in height is required to operate the dynamic pressure machine. In addition, it can regulate the headwater level. The dynamic pressure machine can therefore also be used to generate energy with low head and fluctuating flow. According to the inventor, it uses not only the potential energy (height of fall) of the water but also its kinetic energy (flow velocity).
The functional principle is compared by some authors with that of a regulated medium-sized waterwheel , others compare it more with a rotary water pressure machine.
With the possibility of regulating the headwater level, the dynamic pressure machine can in principle replace conventional barrages . Since the speed of rotation of the impeller corresponds exactly to the flow speed of the water, fish and other living things can easily cross the impeller downstream. A fish ladder is still required upstream .
Investments
A pilot system has been running on the Wiener Neustädter Canal in Pfaffstätten since March 31, 2006 . This is currently out of order. The first dynamic pressure machine in Germany with an output of 260 kW and a 2-meter dam is planned for the Lenne near Altena .
Currently (as of Jan. 2014) three plants with 450 MWh / a are planned or are already being built in Pfaffstätten.
Since 2010/2012 two prototype systems with a total output of 30 kW have been running in locks 28 and 29 on the Wiener Neustädter Canal .
swell
- ↑ Status report on the development of the dynamic pressure machine , Institute for Hydraulic Flow Machines at Graz University of Technology .
- ↑ Energy Agency NRW: Projects of the Month November 2004. Einsal hydropower plant produces environmentally friendly electricity.
- ↑ Finally the green light for the dynamic pressure machine . In: Badener Zeitung, January 19, 2014.
literature
- Patent AT404973B : Hydropower - dynamic pressure machine . Filed April 1, 1997 , published April 26, 1999 , inventor: Brinnich Adolf.
- Patent AT501575A1 : hydropower dynamic pressure machine . Registered on December 27, 2005 , published on September 15, 2006 , inventor: Brinnich Adolf.
- James Senior et al .: The development of the rotary hydraulic pressure machine