would a block of ice work

Discussion on Stirling or "hot air" engines (all types)
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wardle3
Posts: 4
Joined: Sun Jun 10, 2007 8:22 am

would a block of ice work

Post by wardle3 » Tue Jun 12, 2007 7:04 am

I was wondering if anybody has tried to freeze water in the cooling part or would that not work. any ideas please... thanks

tmk
Posts: 28
Joined: Tue May 01, 2007 9:37 pm

sure

Post by tmk » Tue Jun 12, 2007 8:08 am

i saw an engine at the maker faire which was similar to a LTD in shape, but the bottom plate was basically an aluminium heat-sink, with a block of ice frozen around it

the hot side was just the air, and it ran fine

-tmk

boydhouse
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Location: Concord California
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Post by boydhouse » Tue Jun 12, 2007 9:47 am

A Stirling engine is a temperature differential engine. It runs on the difference in the two temperatures.

The greater the difference between the two the more potential it has. But you can also lower the temperature on the hot side if the cold side also goes down in temp. Or visa versa.

Just keep the hot side hot and the cold side cold (Macdonalds would be happy) and it will run all day. (or the hot side warm and the cold side freezing) LOL

I have run Ice cubes and water in the cold side of the tin can engine and it runs faster (at first) and longer before the water heats up and it slows.

DB

antidartan
Posts: 15
Joined: Mon Sep 17, 2007 11:03 am
Location: ROCHESTER,ny

Post by antidartan » Tue Sep 18, 2007 5:46 am

I have a dry ice supplyer down the road, that should be cool. No pun intended.
VENI VIDI VICI

Cartech
Posts: 99
Joined: Mon Oct 30, 2006 11:26 pm
Location: Northern Nevada

Using ice for cold side

Post by Cartech » Fri Sep 21, 2007 9:48 pm

Ice works well especially for first runs or when your having trouble with a new design. It will help you from adding too much heat to get it started. Just keep the melting water out of the inside! I needed ice to get my first engine running the first couple times until I fixed all the lttle things like extra friction. Dry ice is even better, just don't burn yourself with it. It evaporates without leaving liquid and is much colder than water ice. It will stick to you skin, handle with care and keep away from the kids and never place in a small air tight container. The container may explode as it heats (melts) up if not allowed to evaporate freely!

SScandizzo
Posts: 66
Joined: Tue May 16, 2006 5:06 pm
Location: California

Post by SScandizzo » Sun Sep 23, 2007 10:06 am

One other tip,

be sure to build your tolerances with the engine's application in mind. Cold causes metal to contract, heat causes metal to expand; and different materials and thickness are affected differently!

-Stefan

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