The power of atmospheric pressure, the power behind the Newcomen Steam Engine of 1712
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- Опубликовано: 4 ноя 2020
- We don't think much of the atmospheric pressure that is around us at all times but its power is incredible. In 1712, Thomas Newcomen changed the world by displacing air with steam in a cylinder and then cooling the steam allowing atmospheric pressure to push a piston into the cylinder. It's much more powerful than you might think, and was put to work replacing teams of horses and hundreds of men. It was the first significant way of turning heat into work. This video experiment demonstrates how powerful that atmospheric pressure can be.
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Thanks for this. Too many videos get it wrong- the steam does not drive the piston, negative pressure does. It’s like creating a vacuum which the external atmospheric pressure pushes down on with great force (psi).
when designing storage tanks you have to install a vacuum breaker so it won't collapse if the wall is thin. Also now we use nitrogen to inert vessels to exclude air to prevent flammables from igniting (like gasoline) but in the old days they purged with steam to get the air out. Amazing a Newcomen engine could have a piston force of 90,000 psi. I calculated the force on a steam locomotive piston once at 200 psi and I think that is in the same range although a much smaller piston area.
Great demo
nice demonstration
Great explaination
I wonder what could be done with this concept using modern materials and technology. Low pressure steam is pretty safe, and this is a lot of power.
the barrel had to be reheated so that it would return to its shape
That is my logistic paradigm that they do not want to SHIFT.
Yes.
+ve P. P.
So 18th century is 1700 to (1800-1). Is it?
Diagram of a Newcomen steam engine, used at mines in the 18th century.
I see these words:
1. MINE PUMP
2. PUMP ROD
3. ROCKING BEAM
4.COLD-WATER PUMP FOR ENGINE
5. COLD-WATER TANK
6. COLD-WATER VALVE
7. CYLINDER
8. PISTON
9. WEIGHT OF ATMOSPHERE
10. BOILER
11. COLD-WATER SPRAY
12. RODE TO OPERATE STEAM VALVE
It's an atmospheric engine.
James Watt's engine is a steam engine. Reverse the process and you could describe a Watt engine!
so besides crushing itself does it have any application in the real world!!!
Newcomen's machine was an Atmospheric Pump.
It provided Atmospheric Power, ( natural air pressure) a whole 10psi.max.
So, why call it a Steam Engine?
A Steam Engine is different, It provides Steam Power.
That's why it's called a Steam Engine. It could provide High Pressure Steam Power, as much power as your engine could take, which explains why there were so many explosions.
James Watt dumped Newcomen's Atmospheric Power and Arkwright's Water-Power for High Pressure Steam Power.
Like James Watt's High Pressure Steam Engine.
It was the difference between an Industrial Revolution and no Industrial Revolution!
It is not morning there?
Ok.
It's powered by atmospheric pressure, so why call it a steam engine?
A steam engine's powered by steam, like James Watt's engine. It's a different engine.
Just put the pressure back again.