"Hi...We are new here!" First posts here (or anywhere is OK)

Discussion on Stirling or "hot air" engines (all types)
CrisGws
Posts: 5
Joined: Tue Apr 03, 2018 9:48 am

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by CrisGws » Tue Apr 03, 2018 10:04 am

Hi there

omblauman
Posts: 6
Joined: Thu Apr 12, 2018 4:01 am

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by omblauman » Thu Apr 12, 2018 10:17 am

Hi I am a retired physicist living in venice Italy, if you ever pass by please call in, will talk about Stirling engines or this fascinating city where I now live, Oscar

boydhouse
Site Admin
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Location: Concord California
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Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by boydhouse » Fri Apr 13, 2018 5:35 am

omblauman wrote:Hi I am a retired physicist living in Venice Italy, if you ever pass by please call in, will talk about Stirling engines or this fascinating city where I now live, Oscar
Hi Oscar. I was in Venice year before last. Fascinating place. Actually my favorite place was the markets (fish). That was over whelming!!


From our window where we stayed.

[youtube][/youtube]

Yorky
Posts: 9
Joined: Sun May 06, 2018 8:13 am
Location: Yorkshire England

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Yorky » Sun May 06, 2018 8:29 am

Hello Everybody,

My eyes are bleeding from to much studying, but I finally have got to a point that I am confident enough to start something.

Just thought I would introduce myself and thank all that have contributed to this forum in the past, perhaps I can recipricate with details of my build.

I mention this because I do not see many "How To" or "This Is How I Did It" type threads. Is the any objection to cataloguing my progress, warts and all ?

I will post the start up details probably tomorrow and see what the response is.

In the meantime, thanks again. I would not have got here without you all.

Toodlepip

Yorky

Ian S C
Posts: 2221
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Ian S C » Mon May 07, 2018 4:05 am

Yorky, go for it, at least I will follow along. Oh and welcome to the forum.
Ian S C

Pacman
Posts: 4
Joined: Tue Dec 18, 2018 3:41 am

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Pacman » Tue Dec 25, 2018 7:26 am

Hi everybody,
Im a racingengine builder and developer who find every kind of technology interesting. Ive had my eyes on the Stirling Engine for some years now, bought a small tablesize demo engine for studying and been designing my own engine in my head.
About a year ago my brother got me into cryptocurrency mining and we built a couple of mining rigs. First off it went golden but as the cryptos falled and electricity prices rised its not that funny anymore. Thats when my brother triggered me to finally build the Stirling Engine and produce our own electricity.

Im still in the last designing phase but soon to start the build. My way is to try to use an automotive V8-engine and convert into four Alpha-style Stirling Engines in 90 degrees offset. I have the flow pattern of cold and hot water sorted out but Im stuck at how to design the regenerator. My thought was to design it in parallell of all four Engines but separated in flow so that all Engines got to use eachothers heat in the reverse flow phase.

Has anyone here any actual success doing what Im doing or am I out on deep water here?

/Patrik "Pacman"

voxelman
Posts: 2
Joined: Tue Dec 25, 2018 9:23 pm
Location: Southeast Iowa

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by voxelman » Wed Dec 26, 2018 2:04 pm

New here with an interest in developing the use of a Stirling engine for off grid power. My current grid tied consumption averages about 33 kWh/day; annualized to 12 MWh. I have grid tied solar that has until recently produced enough power to make our system net zero. The name plate capacity of the system is 11 kW consisting of 44 - 250 watt panels with Enphase M215 micro inverters that provide split phase 240 AC power. I will be adding another 12 - 345 watt panels in the spring with Enphase IQ7+ micro inverters.

However, our utility has informed us that they will be installing a smart meter on our system within the next year and if our attempts to opt out of this change aren't successful we will disconnect from the grid as soon as we are contractually allowed.

I am retired as of this past September with a background in surveillance video systems concealment design and manufacturing. I am familiar with many of the manufacturing resources in my region and have several friends and acquaintances that share my technical proclivities.

I have been reading far and wide on the subject of Stirling engines and realize that developing them is not a walk in the park. I found the information about the ST-5 and the NASA free piston engines the most compelling. I would like to look at the possibility of providing heat to these designs using a rocket stove type system because of their high efficiency and clean burning characteristics. I live in a rural area that is heavily agricultural and plan to investigate the use various forms of agricultural "waste" as a fuel source.

On another subject I would like to investigate is the use of geothermal temperature differences to drive a sterling engine. I realize that the low temperature differences in these systems may make them impractical. But the idea that a 1500 - 2000 foot deep well might be able to supply a life time supply of energy for a home is hard to ignore though it is probably to good to be true. As the matter stands our home was built with a geothermal ground source heat pump system with 2 - 150 foot wells that makes our HVAC energy costs significantly lower.

So as the say in virtually every YouTube video: "Lets get started!"

Ian S C
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Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Ian S C » Thu Dec 27, 2018 1:57 am

Welcome Voxelman, you'll find all sorts here. For home and water heating, go geothermal. For electridity I am coming to the conclusion that the best way I can see is if a group (city block, sub division, small town) get together and provide their own power, and at the same time their own cell and internet. How about a local body law, All houses shall have PV cells on their roofs, and maybe solar/geothermal hot water. A good idea for coming years, solar on the garage roof for charging the E-car. Enough from me, I'll hang around to see what you come up with. Ian S C ps have a happy new year for 2019.

voxelman
Posts: 2
Joined: Tue Dec 25, 2018 9:23 pm
Location: Southeast Iowa

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by voxelman » Wed Jan 02, 2019 3:11 am

Ian, I’ve already read several of your posts and appreciate your knowledge and experience in this area. Thank you for your supportive words. It is early days and I still have much to learn. Happy New Year to you as well and a prosperous 2019l

Vandee
Posts: 1
Joined: Sun Feb 10, 2019 9:39 am

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Vandee » Sun Feb 10, 2019 10:07 am

Hey there, new guy here. I'm very interested in free piston Stirling engines to be used in conjunction with rocket mass heaters for off the grid applications in combined heat and power. Located in Alberta, Canada where the current temperature is -34 degrees C ....lol.

Ian S C
Posts: 2221
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Ian S C » Tue Feb 12, 2019 3:21 am

Hi Vandee, +30*C here today. I have only built two free piston motors, the first a BETA type didn't work too well, I found later that it was all my fault, too much steel around the magnets I had on the piston to generate power. The second one , a GAMMA motor goes quite well, plenty of aluminium, and bronze. My motors are fairly small and unpressurised, but one thing I have found is that mechanical springs are a big pain to get right, so I use a pair of magnets as springs for the power piston (like poles repel), the moving magnet passes between wire coils to generate electricity. The displacer operates as in a Ringbom motor, and only has springs to soften the blow of the displacer on the ends of the hot cylinder. The magnets used are ex Micro wave oven, similar and bigger magnets can be got from old speakers, in your motor rare earth magnets would be a help.

Ian S C
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Rahmsauce
Posts: 9
Joined: Sat Mar 02, 2019 3:27 pm

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Rahmsauce » Sat Mar 02, 2019 4:12 pm

Hello,
I'm new to this forum. I created my account to find troubleshooting tips for my stirling engine that I just built and won't run. I'd really appreciate you checking out my post about that.

Rahmsauce
Posts: 9
Joined: Sat Mar 02, 2019 3:27 pm

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Rahmsauce » Sat Mar 02, 2019 4:18 pm

Hello,
I'm new to this forum. I've created this account to maybe get some advice to get my stirling engine running that I just built. I'd really appreciate you checking out my post about that.

Zebulon
Posts: 1
Joined: Mon Mar 04, 2019 7:25 am

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Zebulon » Mon Mar 04, 2019 7:36 am

New here. Hi everyone. I am looking to learn as much as possible about the Stirling cycle as I want to build a 50hp unit eventually. Just because.
I have two little model motors but I feel like there is so much more that can be done that these desktop motors don not address. I already downloaded about 15 of the NASA technical papers on the Stirling engine, and I have been reading through them. But information is difficult to find.

Ian S C
Posts: 2221
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: "Hi...We are new here!" First posts here (or anywhere is OK)

Post by Ian S C » Tue Mar 05, 2019 2:53 am

50hp is a bit optimistic, you will need a good machine shop, and deep pockets, A good start is to aim for a few hundred Watts. A least with a presurised motor, and modern materials the size comes down, in the old days it was thought that 1 ton per horse power was good going. I assume that you built the two little ones, did you design them, or buy kits?

Ian S C

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