Stirlingengineforum.com

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...

Looks nice - have you made some progress ?

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?

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

Sory, but I don't quite understand you. How do you mean stunted ?

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...

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...

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 ...

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...

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.

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?

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...

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...

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...

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...

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?