. motive for innovation:
Accompanied by the growing CO2 problem compels us to concern about future energy supplies to question our lifestyle
career-promoting politicians have been able to reap sympathy by the environmental. problem by cheap ticket counter solutions want: left "to save the world" argued that the state should do this and that, the main thing is the individual citizen has to say as little like thinking while conservatives prefer the approach that other states were to blame and they must take care of it.
Since red, our media landscape in the debate between these two fronts is no room for interest, responsible and self-acting people, it is appropriate to represent their position here.
IT CAN is the question to the fore, as the regular budget, his own production company, the office and the individual farm energy use more efficient. Just as the demand can greatly reduce fossil fuels, if we replace oil heating by solar panels, is in reliable working Stirling engines is an enormous energy saving potential.
principle of a Stirling engine:
The steam engine by I. Newton in the 18th Century England secured once the unassailable world power. Their operating principle was to convert a thermal potential into mechanical power. Through the expansion of water when heated allows the "Delta_T" (temperature difference between inside and outside the system) a displacement of the piston. After expansion the steam is let out again and the flywheel can start the process all over again. Thus, the ongoing movement is constructed. The efficiency has, however, very limited, because the thermodynamic performance is not used to half of the process and lost the heat in the steam drained from the system.
The fact that Robert Stirling of Scotland in 1816 to allow the idea to go through the whole process in a closed system. He invented a heat engine, in receiving a gas at high temperature and entropy at low temperatures releases it again.
working principle, such a Stirling engine with two coupled cylinders: one is the heat and the other the cold bath. To be first heated in the heat bath (boiler) is a gas, which then causes a volume expansion. The piston in the cold bath first direction displaces the gas boiler. Halfway through expansion of the boiler from the cold bath is drawn in again until it has reached its full size (then the cold bath has reached its half volume). Thereafter, the compressed gas in the boiler again, the gas flow is blocked and the constant amount of gas expands in the cold bath to the maximum volume, so there a cooling off is generated. Between the two cylinders, a regenerator is a heat exchanger that receives this "cold set" and fed to the boiler, which facilitates the return of the piston displacement (isothermal compression). The cooled compressed gas in the boiler reaches its minimum volume, the cooling bath was then his first half volume and the process begins again. Thus, this cycle is more efficient than all other thermal power machines.
the four Stirling-cycle processes:
The Stirling engine uses isothermal and isochoric processes. Isothermal means that the temperature remains constant and isochoric means the maintenance of a constant volume.
first isothermal expansion in the boiler
second isochoric cooling in the regenerator
third isothermal compression
4th isochoric heating
could be used in future for the production of electricity such Stirling engines, the fossil energy consumption could be reduced significantly without additional savings. The reason why were realized in the last 200 years and just a few hundred such objects can be attributed to complications of the material properties. The piston and the cylinder walls do not reach a sufficient temperature change as fast as the gas. It is therefore hardly possible to build a reliable working Stirling engine, which passes through the ideal process properly. The experiment realized engines are notable for their frequent performance suspensions, which such a product, marketing is not yet compatible. The Stirling engine is an interesting approach, thermodynamic laws in a realistic project implementation.
Sources:
- Thermodynamics System Design: Lectures Prof. Maurer / website: systemdesign.ch
- Calculation curve: Modellierunsprogramm "Berkeley Madonna"
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