Best Ideas 2021 features all the nominated entries submitted under ‘Submit your Idea’ category. All the entries consist of innovative solutions or propositions for an enterprise that champions the Sustainable Development Goals. They can be on the conceptual, planning, or start-up stage.

Electric current generator based on the Strirling engine principle

Published on August 11, 2021 um 10:32

Explain your idea in details:

The generator is based on the movement of a column of liquid metal in a magnetic field, where an electric current is induced. The movement is achieved by changes in the pressure of the working gas, which are induced by the movement of displacement pistons similar to the Stirling engine. The principle is illustrated in the attached figures. The heat source can be fuel combustion, nuclear reaction or solar radiation. Experience from previous Stirling engine designs for displacement pistons can be utilized, and the use of heat exchangers and high pressure for the working gas. It is necessary to determine experimentally how high frequencies can be achieved at maximum efficiency and that the liquid metal column is not disturbed to the point of aerosol formation. Achieved frequency affects the size of the transformer necessary to achieve higher voltages. The displacement pistons must move in reverse and should be controlled electromagnetically. The disadvantage of this design is that this generator can only operate in the vertical position shown and that the cooler must dissipate all the heat input.

Expected impact of your idea on sustainable development

The Stirling engine can achieve high efficiency limited only by the Carnot cycle, runs quietly and can use a variety of heat sources. The proposed solution eliminates rotating components and reduces the sealing requirements of moving parts. It can be used to convert solar radiation into electrical energy using a parabolic mirror or to drive various vehicles by burning almost any fuel in combination with an electric battery. Alternatively, as a source of electrical power for rovers on other space bodies using the heat of radioisotope sources. For for space probes, artificial gravity, i.e. rotation, is required.

Plans for implementation and sustainability

I have no plans in that direction. I have no experience in business and at my age I don't have the strength to start in this field.

Your profile

I am 70 years old, I studied physical chemistry at the faculty of natural science, but I have basically not worked in this field. About half of my professional life I worked as a programmer, the other half as an economist with a focus on budgets and calculations. I have been retired since the age of 63 and have pursued my hobbies of science, technology and inventing. Unfortunately only to the idea stage as I don't have the resources, capabilities or connections to test the functionality and quality of these ideas. Since I don't have many years left to live, I decided to submit these ideas to this contest where they can serve directly or as inspiration for other solutions. These ideas are mainly in the area of energy conversion.

Stage of Idea

conceptual stage, idea offered for implementation by others

Picture upload

Picture upload

Post a comment


October 20, 2021 09:03

There is only one thing that makes a dream impossible to achieve >> The fear of failure. So many of our dreams at first seem impossible, then they seem improbable, and then, when we summon the will, they soon become inevitable.