Why do you need to start this Stirling engine by hand?

In summary, the Stirling engine needs to be started by hand because there is not enough initial power to overcome the inertia. Once started, the momentum of the flywheel keeps the engine running. Just like a regular engine, the Stirling process consists of four phases and only one phase actually generates power. The flywheel is responsible for keeping the engine running through the other phases, similar to a starter motor in a regular engine. It may be possible for the engine to start itself when heated if the flywheel is in the correct position.
  • #1
mh1985
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0

Homework Statement


Why do you need to start this Stirling engine by hand?
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Homework Equations



N/A

The Attempt at a Solution


there is not sufficient power at first to overcome the inertia, so external work in the form of pushing it by hand is needed. however once started the momentum of the flywheel keeps the engine running?
 
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  • #2
Welcome to PF, mh1985! :smile:

Just like a regular engine, the Stirling process consists of 4 phases.
In only 1 phase does the engine actually generate power.
The flywheel keeps the engine running through the other phases.
(That's also why a regular engine needs a starter motor.)

I suspect that if you bring the flywheel in the right position, the engine should be able to start itself when heated.
 
  • #3
Thanks for the response, and the warm welcome!
 

1. Why can't the Stirling engine start on its own?

The Stirling engine relies on an external heat source to generate power, and without this heat source, it cannot start and run on its own. It requires an initial manual start to begin the cycle of operation.

2. How does starting the Stirling engine by hand work?

Starting the Stirling engine by hand involves manually moving the displacer piston to one end of the cylinder, creating a temperature difference between the hot and cold ends. This temperature difference allows the engine to begin its cycle of operation and generate power.

3. Can the Stirling engine be started automatically?

Yes, modern Stirling engines can be equipped with automatic starters, such as electric motors or compressed air systems. However, traditional Stirling engines still require manual starting by hand.

4. Why is manual starting necessary for Stirling engines?

Manual starting is necessary because the Stirling engine operates on a closed-cycle, meaning the working gas is constantly contained within the engine. Therefore, the engine needs an initial manual start to create the temperature difference and begin the cycle of operation.

5. Is there a reason why Stirling engines cannot start on their own?

Stirling engines are designed to be highly efficient and reliable, and manual starting is a part of this design. It ensures that the engine operates at its optimal efficiency and can be easily maintained and repaired if needed.

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