Calculating Heat Generated by Piston Motion

In summary, the conversation is discussing how to calculate the heat generated by a piston that moves up and down and has two semi-circle wedges acting as dampers. The speaker suggests using the equation for heat generated by friction, which is equal to the force multiplied by the distance moved. They also mention the importance of considering the normal force and friction coefficient. They suggest researching "frictional heat generation" for more information.
  • #1
kalel
2
0
Hi,

I am testing or trying to figure out how much heat would be generated for a piston that moves up and down and has two semi-circle wedges that press against to slow down its motion.
I want know what factors and equations I can use to calculate the heat generation?
All other related topics seem to be about rotating disc.

Thanks,
 
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  • #2
You haven't really given enough information to give much of a reply, but the heat generated by friction is equal to the Force times the Distance moved.
 
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  • #3
The piston is only moving along one plane...ie vertically. The clamps are situated around the middle and squeeze against the piston as it moves up and down acting as a damper. Does that help?
 
  • #4
Not really, but as said, if you have a force and a distance, you can calculate it.
 
  • #5
Well, you'll need more than just a force and distance I think. I believe that you'll need the normal force acting on the piston from the "clamps". Even from there, you'll need a friction coefficient.

Google frictional heat generation, it should help you.
 

FAQ: Calculating Heat Generated by Piston Motion

What is the equation for calculating heat generated by piston motion?

The equation for calculating heat generated by piston motion is Q = P * V, where Q is the heat generated in Joules (J), P is the pressure in Pascals (Pa), and V is the volume change in cubic meters (m^3).

How is the pressure and volume change of the piston measured?

The pressure and volume change of the piston can be measured using a pressure gauge and a displacement sensor, respectively. The pressure gauge measures the pressure inside the cylinder while the displacement sensor measures the change in volume of the cylinder.

What factors affect the heat generated by piston motion?

The heat generated by piston motion is affected by various factors such as the engine speed, the compression ratio, the type of fuel used, and the air-fuel ratio. These factors can impact the pressure and volume change of the piston, ultimately affecting the amount of heat generated.

How does the heat generated by piston motion impact engine performance?

The heat generated by piston motion can impact engine performance in several ways. Excessive heat can lead to engine knocking, which decreases the efficiency of the engine and can cause damage. On the other hand, insufficient heat can result in incomplete combustion, leading to decreased power output and increased emissions.

Can the heat generated by piston motion be controlled?

Yes, the heat generated by piston motion can be controlled through various methods such as adjusting the compression ratio, using different types of fuel, and optimizing the air-fuel ratio. Advances in engine technology have also led to the development of cooling systems that help regulate engine temperature and control the heat generated by piston motion.

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