Methods of rotational energy harvesting and storage

In summary, there are several methods available to harvest and store rotational energy, including using a turbine and compressing air, using an electric generator with a battery, using torsional springs, and using a flywheel. Another method is using a pulsed alternator, which allows for the accumulation of rotational energy over time and quick conversion to electricity. The most efficient method may depend on the specific application. Apart from an electromagnetic generator, there are also products/systems such as the pulsed alternator that are used for this purpose.
  • #1
physea
211
3
Hello!

What are the available methods to harvest rotational energy?
I was thinking to put a turbine on the shaft and compress air, but the air will get cold and the energy will be lost.
I was thinking to put an electric generator, which is ok but it needs a battery.
I was thinking to use torsional springs.
I was thinking to use a flywheel, but it must have quite large mass to store the energy.

Are there any other methods to harvest and store the rotational energy of a shaft?
Which would be the most efficient?
Are there any products/systems sold? (apart from the electromagnetic generator).

Thanks!
 
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  • #2
There is a device called a pulsed alternator that is used to power rail guns. It allows the accumulation of rotational kinetic energy over an extended time period with a quick conversion to a high-current electrical pulse when the energy is dumped.
 

1. What is rotational energy harvesting and storage?

Rotational energy harvesting and storage is a method of converting and storing the kinetic energy produced by rotational motion into a usable form, such as electrical energy. This process involves using devices, such as turbines or motors, to capture and convert the rotational energy into a form that can be stored, such as in a battery or capacitor.

2. What are some applications of rotational energy harvesting and storage?

Rotational energy harvesting and storage has a wide range of applications, including renewable energy production, such as wind turbines and hydroelectric plants, and in various industrial and transportation systems, such as regenerative braking systems in vehicles. It can also be used in small-scale applications, such as powering consumer electronics and wearable devices.

3. How does rotational energy harvesting and storage compare to other energy harvesting methods?

Compared to other energy harvesting methods, rotational energy harvesting and storage has the advantage of being able to produce high amounts of energy from large, continuous rotational motion sources, such as wind or water. It also has a longer lifespan and requires less maintenance compared to other methods, such as solar or piezoelectric energy harvesting.

4. What are some challenges and limitations of rotational energy harvesting and storage?

One of the main challenges of rotational energy harvesting and storage is the variability of the rotational speed and torque, which can affect the efficiency of the energy conversion. Additionally, the size and weight of the harvesting and storage devices can also be limiting factors, especially in smaller or portable applications.

5. What advancements are being made in rotational energy harvesting and storage technology?

Scientists and engineers are constantly working on improving the efficiency and effectiveness of rotational energy harvesting and storage. This includes developing more efficient and durable materials for the devices, as well as implementing smart control systems to optimize the energy conversion process. There is also ongoing research into new technologies, such as magnetostrictive and electroactive polymers, to further improve the capabilities of rotational energy harvesting and storage.

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