Search found 12 matches

by hephaestus
Thu Jan 19, 2012 11:37 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: design help and build log
Replies: 7
Views: 3721

Re: design help and build log

Ah mig, its just handy for quick sticks :) I hate it, bit its so quick and easy, takes almost no skill... tig is my nemesis, we have a love hate relationship... Was playing with some carbon fibre last week, happened to knock out the remains of the cup... having a ridiculous thought... that was one h...
by hephaestus
Wed Jan 04, 2012 8:01 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: design help and build log
Replies: 7
Views: 3721

Re: design help and build log

Somewhere in between, get fragile stringy bits, not powder, not the usual steel swarf either...(Sprinkler as in fire protection, not as in watering your lawn). Not sure... I have a little metal working lathe, and sherline, I'm more an arc welder, but I do have mig/tig... oxy/acy of course. Yeah have...
by hephaestus
Tue Jan 03, 2012 7:45 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: design help and build log
Replies: 7
Views: 3721

Re: design help and build log

Yup, partly why I'm shooting for 500w - 516cc total displacement... The cast pipe confuses me, it looks sand cast, but it has a ridge the whole length, looks a lot like the hrew tube I usually work with... but it came from a sprinkler tech friend, he swears its cast... Skate bearings are funny - som...
by hephaestus
Tue Jan 03, 2012 2:01 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: design help and build log
Replies: 7
Views: 3721

design help and build log

happy new year! Ok, I've been away... playing with the plans, kits and ideas learned here... getting my basic understanding of Stirling design... But now its time to move forward, time to sh-t or get off the pot so to speak... means its time to put this knowledge to use... The project goal - 500w ou...
by hephaestus
Tue Apr 05, 2011 2:30 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Ways to increase thermal conductivity of working gas.
Replies: 17
Views: 8789

Re: Ways to increase thermal conductivity of working gas.

Ionizing could be easily done, I can find small car / house ionizers in the dollar stores - install in the regenerator, add power; done like dinner.
by hephaestus
Tue Mar 29, 2011 1:43 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Oddball theoretical question - ammonia absorption
Replies: 14
Views: 8819

Re: Oddball theoretical question - ammonia absorption

Sometimes a bucket of water isn't appropriate... Really we're talking a pressurized loop of tubing with a resevoir in it... Not a huge refrigeration system... ubiquitous rv fridge 'buisness end' : http://chillz.com/RV_Refridgerator_Cooling_Unit-RV_Refrigerator_Cooling_Unit__red.jpg A bucket of water...
by hephaestus
Tue Mar 29, 2011 12:48 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: planning fro large solar gamma stirling engine
Replies: 16
Views: 10419

Re: planning fro large solar gamma stirling engine

Bill Gross got unnecessarily complicated... Yes you can use his petal system... But a 4x8 solar water heater is going to get you the same or better results... Part of what's drawn me here was looking for a way to turn a planned passive solar water heater system into a full on active system solar wat...
by hephaestus
Sun Mar 27, 2011 2:33 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Oddball theoretical question - ammonia absorption
Replies: 14
Views: 8819

Re: Oddball theoretical question - ammonia absorption

What can google translate do? :) Ma c'è un secondo tipo di frigorifero ammoniaca che fa uso di un ciclo di assorbimento e ammoniaca si scioglie molto bene in acqua fredda, ma non così bene in acqua calda. In un ciclo frigorifero ad assorbimento, una soluzione concentrata di ammoniaca in acqua è risc...
by hephaestus
Sat Mar 26, 2011 7:30 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Oddball theoretical question - ammonia absorption
Replies: 14
Views: 8819

Re: Oddball theoretical question - ammonia absorption

That's beyond my knowledge, I know my rv fridge freezes the whole fridge up solid if I crank it up (3cuft)... The aussie designed solar fridges we're planning to buy (3 way, 12v, solar heater, LPG) are supposed to be way more advanced than the RV fridges and they're full size fridges; designed to ru...
by hephaestus
Fri Mar 25, 2011 6:26 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Oddball theoretical question - ammonia absorption
Replies: 14
Views: 8819

Re: Oddball theoretical question - ammonia absorption

ammonia absorption systems have no compressor... Sealed system, heat one end, get cold out the other... (RV fridges are the most common variation) Also refered to as an einstein fridge, amongst many other names... good explanation: But there is a second type of ammonia refrigerator that makes use of...
by hephaestus
Fri Mar 25, 2011 2:17 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Oddball theoretical question - ammonia absorption
Replies: 14
Views: 8819

Oddball theoretical question - ammonia absorption

G'day all, Wanted to bounce something off the experts... Came to mind while talking to an aussie company who sells solar refridgerators; while reading about the Vtwin compressor retrofits... Would it not be useful to run an ammonia absorption coil on a sterling engine? Same principles as the sterlin...
by hephaestus
Thu Mar 24, 2011 12:14 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: "Hi...We are new here!" First posts here (or anywhere is OK)
Replies: 442
Views: 174935

Re: "Hi" We are new here!

:mrgreen: FNG Here, jack of all trades, master of none.. Well maybe a couple... Found you guys looking for info on a sterling I saw on discovery channel, doing the leg work for an off grid home... Well the homes been easy - it's my garage that's the headache... Welders create headaches, and I'm not ...