Stirling Engine - Revision history

Adamcolton at 13:31, 10 December 2018

2018-12-10T13:31:24Z

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 * https://www.youtube.com/watch?v=bhTcbg7wujo
 == Version 0.1 ==
 === Design ===

2018-08-23T15:26:02Z

← Older revision		Revision as of 15:26, 23 August 2018
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			What I'd really like to do now is put together a concise explanation of the challenges that make a Stirling engine impractical.

	* https://www.youtube.com/watch?v=bhTcbg7wujo		* https://www.youtube.com/watch?v=bhTcbg7wujo
	== Version 0.1 ==		== Version 0.1 ==
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	* Bearings: ~$0.40		* Bearings: ~$0.40


	~~[[Category:Projects]]~~
	[[Category:Workshop]]		[[Category:Workshop]]

2015-10-07T15:33:45Z

← Older revision		Revision as of 15:33, 7 October 2015
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	=== Design ===		=== Design ===
	Two beta style engines coupled together.		Two beta style engines coupled together.

	~~== Phase Linkage ==~~
	~~Saw a cool design that used a 90° linkage so the piston and displace could run off the same crank.~~

	==== Piston ====		==== Piston ====
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	== Notes ==		== Notes ==
	I saw a video using metal water bottles for the chamber - metal and already very smooth.		I saw a video using metal water bottles for the chamber - metal and already very smooth.

			Saw a cool design that used a 90° linkage so the piston and displace could run off the same crank. But I might still need bearings for all the joints.

			Another idea would be to give each cylinder it's own small crankshaft and transfer the power back to a central shaft via a timing belt.

	== Combustion Heat Transfer ==		== Combustion Heat Transfer ==

2015-10-07T15:27:35Z

← Older revision		Revision as of 15:27, 7 October 2015
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	=== Design ===		=== Design ===
	Two beta style engines coupled together.		Two beta style engines coupled together.

			== Phase Linkage ==
			Saw a cool design that used a 90° linkage so the piston and displace could run off the same crank.

	==== Piston ====		==== Piston ====

2015-10-06T17:16:41Z

2015-10-06

← Older revision		Revision as of 17:16, 6 October 2015
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	=== Design ===		=== Design ===
	~~I want to go back to a fairly thin design, probably about 3". But the cylinders will have a large cross section.~~ I'm ~~going to do a more squarish layout, which may cause issues with the~~ pressure ~~- we'll see~~. ~~Start by building~~ an aluminum ~~box and sealing it with high temperature silicon. The inside is then divided into three chambers. Sealing between these chambers doesn~~'~~t need to be quite as good~~.		Now I'm thinking pressure cookers. Or an aluminum hemisphere - pans are available, but I'm not sure they're thick enough. Or, if I'm deciding on aluminum, I can go back to looking at forges because aluminum is the easiest to work with.

	~~Now~~, ~~go crazy with heatsinks. The bottom and top of the box should be covered in heatsinks~~ on ~~both sides. The displacer will also have heatsinks that mesh with the internal heatsinks.~~

	~~The displacer shaft will~~ go ~~into~~ the ~~center of each chamber and the piston will be slightly off center. The piston should be tall enough~~ to ~~clear the water (water runs over the top/cold heatsink). The bottom "hot chamber" will make a big horseshoe through the fins of the heatsinks then feed back into the stove~~.

	==== Crankshaft ====		==== Crankshaft ====

2015-10-06T16:35:37Z

Design

← Older revision		Revision as of 16:35, 6 October 2015
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	The displacer shaft will go into the center of each chamber and the piston will be slightly off center. The piston should be tall enough to clear the water (water runs over the top/cold heatsink). The bottom "hot chamber" will make a big horseshoe through the fins of the heatsinks then feed back into the stove.		The displacer shaft will go into the center of each chamber and the piston will be slightly off center. The piston should be tall enough to clear the water (water runs over the top/cold heatsink). The bottom "hot chamber" will make a big horseshoe through the fins of the heatsinks then feed back into the stove.

			==== Crankshaft ====
			This will be difficult, but not tricky. Proceed carefully. Each segment is the same a centered piece, off-center, another off-center 90° out of phase then back to center. So each segment requires 3 bearings, plus one more at the end. 10 bearings. The parts will be steel. To connect two segments, I'll drill a small hole and put a pin in it. During the testing phase, I can lose fit everything. When I actually assemble it, I'll get the pin hot, then hammer the ends down. As the pin cools, it will shrink making a very tight fit.

			As I build each segment, I just need to make sure it's balanced. That shouldn't be too hard with the bearings.

	=== Cost ===		=== Cost ===

2015-10-06T16:25:24Z

2015-10-06

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 * Aluminum: 120
 * Steel : 20
 [[Category:Projects]]
 [[Category:Workshop]]

2015-10-06T16:06:09Z

Design 2015-10-05

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 I should be able to measure the power if I know the flywheel weight. By measuring the angular acceleration (and max rpm) I should get the power.
 [[Category:Projects]]
 [[Category:Workshop]]

2015-10-06T04:09:08Z

Design 2015-10-05

← Older revision		Revision as of 04:09, 6 October 2015
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	=== Pressure ===		=== Pressure ===
	These engines perform much better when the air is at pressure. I'd like to experiment with this. I should be able to get a good seal on the shafts with silicone. I can do the tests with a bike pump. When I have an engine that operates near the power I want I'll hook up an electric pump and a pressure sensor.		These engines perform much better when the air is at pressure. I'd like to experiment with this. I should be able to get a good seal on the shafts with silicone. I can do the tests with a bike pump. When I have an engine that operates near the power I want I'll hook up an electric pump and a pressure sensor.

			=== Fins ===
			It would be ideal for heat transfer if I could put some fins in this. For the heat chamber, horizontal plates to transfer heat from the air. Inside the chambers, vertical fins that could mesh with the displacer.

	=== Cost ===		=== Cost ===

2015-10-06T04:01:54Z

Design 2015-10-05

← Older revision		Revision as of 04:01, 6 October 2015
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	Use [http://www.amazon.com/Set-6-Anodized-Aluminum-Tumblers/dp/B0002T7KGG Aluminum Cups] for the cylinders. They're a bit tapered, but I can shape the displacer to match.		Use [http://www.amazon.com/Set-6-Anodized-Aluminum-Tumblers/dp/B0002T7KGG Aluminum Cups] for the cylinders. They're a bit tapered, but I can shape the displacer to match.

			=== Pressure ===
			These engines perform much better when the air is at pressure. I'd like to experiment with this. I should be able to get a good seal on the shafts with silicone. I can do the tests with a bike pump. When I have an engine that operates near the power I want I'll hook up an electric pump and a pressure sensor.

	=== Cost ===		=== Cost ===
	* [https://www.menards.com/main/housewares/cleaning-supplies/trash-cans/20-gallon-galvanized-trash-can/p-89449.htm Trashcan] $16		* [https://www.menards.com/main/housewares/cleaning-supplies/trash-cans/20-gallon-galvanized-trash-can/p-89449.htm Trashcan] $16