Instead of a boiler there would be a large highly pressurized compressed air tank(s) many have a cover that hides the air tanks to make them look like a normal steam engine boiler. Some of the triple expansion engines had 3 air storage tanks that were pressurized to up to 2500psi and valves which regulated the throttle and how much force was placed on the drive pistons. Here is a link to an article that talks about this history of the compressed air engine.
http://www.douglas-self.com/MUSEUM/LOCOL...o.htm#jung
A cars cooling system is kept under a set pressure to keep the engine at is best operating temperature. Coolant raises the boiling point of the water in the cooling system. When the engine warms up the coolant expand and the overflow is released from the system into your overflow bottle (typically where you add coolant). When the engine cools, since the system is sealed and air tight (closed system) there is a vacuum which pulls the coolant from the overflow bottle to refill the system. If you were to remove the radiator cap on a hot or overheating engine it will cause the pressure to drop immediately which will Instantly makes the coolant boil and create a geyser.
When you raise the temperature inside a sealed container it raises its boiling point. Think back to chemestry class, STP (standard temperature and pressure, when one changes the other changes also).
For example if you go to high in a hot air balloon you can cause your blood to boil because the air pressure is so low it drops the boiling point of blood below your body temperature. Most likely a horrible experience I would love to avoid!
(This post was last modified: 03-01-2016, 03:05 AM by anc6802.)
http://www.douglas-self.com/MUSEUM/LOCOL...o.htm#jung
A cars cooling system is kept under a set pressure to keep the engine at is best operating temperature. Coolant raises the boiling point of the water in the cooling system. When the engine warms up the coolant expand and the overflow is released from the system into your overflow bottle (typically where you add coolant). When the engine cools, since the system is sealed and air tight (closed system) there is a vacuum which pulls the coolant from the overflow bottle to refill the system. If you were to remove the radiator cap on a hot or overheating engine it will cause the pressure to drop immediately which will Instantly makes the coolant boil and create a geyser.
When you raise the temperature inside a sealed container it raises its boiling point. Think back to chemestry class, STP (standard temperature and pressure, when one changes the other changes also).
For example if you go to high in a hot air balloon you can cause your blood to boil because the air pressure is so low it drops the boiling point of blood below your body temperature. Most likely a horrible experience I would love to avoid!
Thanks for the information.