At this moment, to obtain energy is using conversion one form of energy into another. It can be energy of natural processes (flow of rivers, tides, waves, wind, geothermal processes, etc.) as well as chemical and nuclear. The amount of energy with certain efficiency is converted to the required electricity. The efficiency ratio of these machines depends on temperature deviation and low temperature deviation is not good condition for high efficiency. However, could be use low temperature deviation as trigger for reversible process?
This following system (picture 1) where energy of a reversible process will be used as lead in this type of energy conversion and low temperature deviation is just a trigger.
Thermo engine is built on the idea of changing the magnetic properties of a material at a certain temperature Curie. It can be powered by a small range of temperatures near the Curie temperature of the ferromagnetic material piston.
The engine consists of the housing 1. On the rotor 2, piston-rod 3 mounted with ferromagnetic piston 5. In stage 1, the magnet 8 attracts ferromagnetic piston 5 with a temperature below the Curie point (T1) which compressing working gas 6. In stage 2, the compressed working gas 6 and additional heater 7 raises the temperature* of the piston 5 to critical temperature Curie (T2). On this temperature, ferromagnetic piston 5 will change own magnetic property and become to paramagnetic. Magnet 8 is not able to hold the paramagnetic piston 5 and compressed gas 6 returns piston 5 to stage 3 as beginning position. In this position, the piston 5 reduces own temperature to T1 through cooling radiator 4 to a temperature below the Curie point T2. At this point, piston 5 becomes to ferromagnetic again, which will be attracted by a magnet 8.
* Theoretically, with a very strong magnetic field to tight gas will provide the necessary temperature above the Curie point.
Then the additional heat can be excluded. However, the cooling must be required.