Piston - Revision history

Jmdonev: 1 revision imported

2021-09-27T00:03:16Z

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energy>Ethan.boechler at 16:37, 13 September 2021

2021-09-13T16:37:23Z

← Older revision		Revision as of 16:37, 13 September 2021
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	[[File:Piston_of_DAT_engine.jpg\|thumb\|300px\|Figure 1: A piston contained inside of a cylinder, used within a sectioned [[gasoline]] engine.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/7/75/Piston_of_DAT_engine.jpg</ref>]]		[[File:Piston_of_DAT_engine.jpg\|thumb\|300px\|Figure 1: A piston contained inside of a cylinder, used within a sectioned [[gasoline]] engine.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/7/75/Piston_of_DAT_engine.jpg</ref>]]
	<onlyinclude>A '''piston''' is a moving disk enclosed in a cylinder which is made gas-tight by piston rings. The disk moves inside the cylinder as a liquid or gas inside the cylinder expands and contracts.</onlyinclude> A piston aids in the transformation of [[heat]] energy into mechanical [[work]] and vice versa. Because of this, pistons are a key component of [[heat engine]]s.<ref name=Knight>R. D. Knight, "Heat Engines and Refrigerators" in ''Physics for Scientists and Engineers: A Strategic Approach,'' 3nd ed. San Francisco, U.S.A.: Pearson Addison-Wesley, 2008, ch.19, sec.2, pp.530 </ref> Pistons work by transferring the [[force]] output of an expanding gas in the cylinder to a [[crankshaft]], which provides rotational momentum to a [[flywheel]]. Such a system is known as a [[reciprocating engine]].		<onlyinclude>A '''piston''' is a moving disk enclosed in a cylinder which is made gas-tight by piston rings. The disk moves inside the cylinder as a liquid or gas inside the cylinder expands and contracts.</onlyinclude> A piston aids in the transformation of [[heat]] energy into mechanical [[work]] and vice versa. Because of this, pistons are a key component of [[heat engine]]s.<ref name=Knight>R. D. Knight, "Heat Engines and Refrigerators" in ''Physics for Scientists and Engineers: A Strategic Approach,'' 3nd ed. San Francisco, U.S.A.: Pearson Addison-Wesley, 2008, ch.19, sec.2, pp.530 </ref> Pistons work by transferring the [[force]] output of an expanding gas in the cylinder to a [[crankshaft]], which provides rotational momentum to a [[flywheel]]. Such a system is known as a [[reciprocating engine]].

Jmdonev: 1 revision imported: Doing upload, largely of old redirects.

2018-06-04T16:52:23Z

1 revision imported: Doing upload, largely of old redirects.

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Jmdonev at 17:43, 1 June 2018

2018-06-01T17:43:36Z

← Older revision		Revision as of 17:43, 1 June 2018
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	[[File:Piston_of_DAT_engine.jpg\|thumb\|300px\|Figure 1: A piston contained inside of a cylinder, used within a sectioned [[gasoline]] engine.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/7/75/Piston_of_DAT_engine.jpg</ref>]]		[[File:Piston_of_DAT_engine.jpg\|thumb\|300px\|Figure 1: A piston contained inside of a cylinder, used within a sectioned [[gasoline]] engine.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/7/75/Piston_of_DAT_engine.jpg</ref>]]
	<onlyinclude>A '''piston''' is a moving disk enclosed in a cylinder which is made gas-tight by piston rings. The disk moves inside the cylinder as a liquid or gas inside the cylinder expands and contracts.</onlyinclude> A piston aids in the transformation of [[heat]] energy into mechanical [[work]] and vice versa. Because of this, pistons are a key component of [[heat engine]]s.<ref name=Knight>R. D. Knight, "Heat Engines and Refrigerators" in ''Physics for Scientists and Engineers: A Strategic Approach,'' 3nd ed. San Francisco, U.S.A.: Pearson Addison-Wesley, 2008, ch.19, sec.2, pp.530 </ref> Pistons work by transferring the [[force]] output of an expanding gas in the cylinder to a [[crankshaft]], which provides rotational momentum to a [[flywheel]]. Such a system is known as a [[reciprocating engine]].		<onlyinclude>A '''piston''' is a moving disk enclosed in a cylinder which is made gas-tight by piston rings. The disk moves inside the cylinder as a liquid or gas inside the cylinder expands and contracts.</onlyinclude> A piston aids in the transformation of [[heat]] energy into mechanical [[work]] and vice versa. Because of this, pistons are a key component of [[heat engine]]s.<ref name=Knight>R. D. Knight, "Heat Engines and Refrigerators" in ''Physics for Scientists and Engineers: A Strategic Approach,'' 3nd ed. San Francisco, U.S.A.: Pearson Addison-Wesley, 2008, ch.19, sec.2, pp.530 </ref> Pistons work by transferring the [[force]] output of an expanding gas in the cylinder to a [[crankshaft]], which provides rotational momentum to a [[flywheel]]. Such a system is known as a [[reciprocating engine]].
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			==For Further Reading==
			*[[Heat engine]]
			*[[Reciprocating engine]]
			*[[Work]]
			*[[First law of thermodynamics]]
			*Or explore a [[http://energyeducation.ca/encyclopedia/Special:Random\| random page]]

J.williams: 1 revision imported

2015-08-26T21:31:30Z

1 revision imported

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J.williams at 16:58, 12 August 2015

2015-08-12T16:58:33Z

New page

[[category:371 topics]]
[[Category:Done 2015-06-01]]
[[File:Piston_of_DAT_engine.jpg|thumb|300px|Figure 1: A piston contained inside of a cylinder, used within a sectioned [[gasoline]] engine.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/7/75/Piston_of_DAT_engine.jpg</ref>]]
<onlyinclude>A '''piston''' is a moving disk enclosed in a cylinder which is made gas-tight by piston rings. The disk moves inside the cylinder as a liquid or gas inside the cylinder expands and contracts.</onlyinclude> A piston aids in the transformation of [[heat]] energy into mechanical [[work]] and vice versa. Because of this, pistons are a key component of [[heat engine]]s.<ref name=Knight>R. D. Knight, "Heat Engines and Refrigerators" in ''Physics for Scientists and Engineers: A Strategic Approach,'' 3nd ed. San Francisco, U.S.A.: Pearson Addison-Wesley, 2008, ch.19, sec.2, pp.530 </ref> Pistons work by transferring the [[force]] output of an expanding gas in the cylinder to a [[crankshaft]], which provides rotational momentum to a [[flywheel]]. Such a system is known as a [[reciprocating engine]].

A piston must follow a cyclical process in order for it to continuously convert heat energy to work, and there are many ways to complete this cycle. For example:

#By ''inputting heat'' to the gas inside the cylinder, the gas will expand increasing the volume in the cylinder and provide useful work.
#By ''removing heat'' from the cylinder, the gas's [[pressure]] will decrease, allowing it to be compressed more easily.
#By ''inputting work'' to the piston, the piston will compress back to its initial state, ready to perform the cycle once again.

This cycle can be visualized in Figure 2 below.

[[File:Piston cycle.png|800px|thumbnail|center|Figure 2: An example of a piston cycle, in which it manipulates heat in order to perform useful work.<ref>Adapted from ''Physics for Scientists and Engineers'' by R. Knight</ref>]]

These steps can be done differently and the processes can become very complex, however this is a simple example of how a piston can be made to perform useful work through the input of heat. It is known that this heat cannot be transformed fully into work, otherwise the [[entropy]] of the system would decrease which is forbidden by the [[Second law of thermodynamics]].

==References==
{{reflist}}
[[Category:Uploaded]]