Search found 65 matches
- Mon Feb 04, 2013 1:55 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Zhivko From what I have seen so far of the #14 engine by Peter Lynn, my best advice to you would be to recommend you delay spending money on fancy heat exchangers and develop the engine you already have. From your video, I suspect your engine is suffering from too much friction and would benefit fr...
- Sun Feb 03, 2013 1:29 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Rotary Displacer LTD Project
- Replies: 2
- Views: 3420
Re: Rotary Displacer LTD Project
Looks nice - have you made some progress ?
- Sun Feb 03, 2013 1:27 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 500w from NZ
- Replies: 5
- Views: 4893
Re: 500w from NZ
I watched video but it seems to me, that original video has been modified (processed) with fast forward function.
Do others have same feeling about video also? If yes what could be the reason?
Do others have same feeling about video also? If yes what could be the reason?
- Sat Feb 02, 2013 3:54 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Sory, but I don't quite understand you. How do you mean stunted ?vamoose wrote:Hey zhivko,
I can tell by your 'very stunted' questioning that i should leave your thread alone.
Good luck with your project!
vamoose
- Fri Feb 01, 2013 6:45 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Hey guys, I've been playing around with silicone bulbs and have been using them in a double acting alpha configuration (so far with limited success. But am getting some positive momentum (and hoping for some more)). http://i1259.photobucket.com/albums/ii543/vamoose2/bulb_zps0fc9a7cf.png The right k...
- Thu Jan 31, 2013 3:01 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Thanks bumpkin - had my brain in red area last few days and that is what it came out :) Heat exchanger acting as spring will hopefully push lameles (rectangles 25mm x 3mm x 250mm for hot exchanger) to the cylinder wall. Lamels would be welded only in two endpoints of each lamel to the stainles steel...
- Thu Jan 31, 2013 4:16 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Thanks Ian for idea, also shaper would be expensive operation (or renting it) if I compare it to idea that I mentioned earlier in my post: http://stirlingengineforum.com/viewtopic.php?f=1&t=1203&start=30#p4992 For that exchanger I would need to cut rectangular pieces of stainless steel (can ...
- Thu Jan 31, 2013 12:29 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Talked to the guy who do wire electric discharge machine (EDM) and found out, that price for slicing such big cylinder with edm would be enormous - cca. 8000€ for all 3 parts. This is for sure price overkill for the engine I am aiming - such machine would take a lot of years of running for it to pay...
- Tue Jan 29, 2013 5:35 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Sealing fixed. You can see video at:
Big beta stirling engine (sealing fixed)
Fix one thing broke another :) That weird noice you can here is displacer touching hot cylinder. This is because the displacer rod is welded at slight angle to the base of the displacer.
Big beta stirling engine (sealing fixed)
Fix one thing broke another :) That weird noice you can here is displacer touching hot cylinder. This is because the displacer rod is welded at slight angle to the base of the displacer.
- Tue Jan 29, 2013 7:23 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
I am currently thinking about idea to increase sloth thickness to 1mm, and make sure that displacer gap to cylinder wall would be around 0.5mm - In this configuration - it seems air would be more likely to go through slots than flow through displacer/cylinder gap.
Is my thinking correct?
Is my thinking correct?
- Mon Jan 28, 2013 10:20 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Bumpkin: "By the way, a Beta with a sealed displacer and external exchangers could just as well be an Alpha, and perhaps better." GeoffV: "ps. Fitting a seal to the displacer does not change it from a beta to an alpha even hanging fairly lights around the displacer will not change it...
- Sun Jan 27, 2013 11:04 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
GeofV and rest of SE entusiasts, Yes, missed the point - since I thought that long cylinder can act as regenerator by itself, but in this version (try my best today to draw it in inventor), I included regenerator chamber. It has 260 slots, 0,4mm wide, 15mm deep. Heater is 265mm long, cooler is 180mm...
- Sat Jan 26, 2013 4:33 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Ok, I changed dimension of slots to (drawing attached): slot wide 0,4 mm slot deep 15 mm CylinderInox.jpg For 260 slots I got area of 2m^2. With 160W/m^2K this exchanger is quite capable. For 160W/m^2K and 500K (if I assume that air is to be heated from 100degC to 600degC) that comes: 2*160*500=1600...
- Sat Jan 26, 2013 9:57 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
Hi GeofV, I did some calculation and I saw that slotted heat exchanger indeed have better HeatArea to deadvolume ratio, but slotted actually heaving smaller heat transfer area meaning that this would result in lower temperature of heated air than in tubular heater design. HeatArea to deadvolume rati...
- Fri Jan 25, 2013 5:31 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Big Beta Stirling 1kw, 100degC to 400degC
- Replies: 113
- Views: 59692
Re: Big Beta Stirling 1kw, 100degC to 400degC
That's huge hot heat exchanger with 3,5m^2 square area but what worries me is volume! It adds 5,56 l of dead volume. That would surely break proportions... Comments anybody?