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Post by josephcrawley on Dec 15, 2020 18:33:05 GMT -8
Just a note of caution Matt's cookstove core does not heat the oven to a traditional baking temperature. It will obtain a slow cook temp. He defines it as a roasting oven. Joseph, the oven temperature is a function of stove design, not core. The riserless core is comparable to other 6" batch type cores in terms of output power and temperature. Apologies Matt for not being more specific I was not referring to the core design but your cook stove designs around the core. I have edited my post to make it more clear. |
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Post by Vortex on Dec 16, 2020 1:12:21 GMT -8
Says there's 0 files, nothing there to download ? |
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Post by Jura on Dec 16, 2020 11:22:26 GMT -8
The link Leads to no any file @ gofiles |
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Post by skywalker on Dec 16, 2020 14:57:44 GMT -8
The link Leads to no any file @ gofiles Sorry folks, i will fix this tommorow. I am on my phone now and not able to acces sketchup. EDIT: This link leads to the file in Sketchup 18 gofile.io/d/FeduGK |
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Post by skywalker on Dec 16, 2020 23:42:24 GMT -8
Says there's 0 files, nothing there to download ? The link should work now properly. Please check my previous post. |
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Post by Jura on Dec 17, 2020 4:57:23 GMT -8
Now I managed to download the file. I opened it and what I could see is that the exit port in the sketch is 11,8 x 11,7 while Vortex mentioned it was 131mm x 106mm. Vortex any other fault you may discern in the sketch? |
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Post by Vortex on Dec 17, 2020 5:29:14 GMT -8
I haven't updated the Vortex thread with that info yet, but it seems to be working great so far. In that sketchup the only thing I can see different is the top chamber Exit Port is a bit constricted, because the top layer of the floor should be back a little and sloped as it the above pics. |
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fuegos
Full Member
not out of the woods yet
Posts: 177
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Post by fuegos on Dec 17, 2020 8:34:49 GMT -8
One advantage i can see with using a riserless core is the low profile - the height of the core is the height of the firebox .This allows the firebox to be higher up - even at 50 cm from the floor the cooktop could be at standard worktop height - for easier loading and cleaning out.
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Post by Jura on Dec 17, 2020 13:17:14 GMT -8
This allows the firebox to be higher up - even at 50 cm from the floor the cooktop could be at standard worktop height - for easier loading and cleaning out. Yup that's teh advantage but teh view of vortex behind the glass is priceless. I'd love to see the Testo results from the matt's core. is it available anywhere? |
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Post by Jura on Dec 17, 2020 13:21:44 GMT -8
In that sketchup the only thing I can see different is the top chamber Exit Port is a bit constricted, because the top layer of the floor should be back a little and sloped as it the above pics. I meant the version uploaded by skywalker. I'll try to implement the changes visible on teh pics in the sketchup model...but..a bit later |
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Post by Vortex on Dec 17, 2020 15:19:10 GMT -8
Oh, you cant see the sketchup he did? He added the stumbler and made the top chamber exit port square. It's good enough for now. I'm doing daily experiments so it may get updated again soon. I'd love to see the Testo results from the matt's core. is it available anywhere? I thought I remembered seeing a graph in the Riserless Core thread but there isn't one there now. |
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fuegos
Full Member
not out of the woods yet
Posts: 177
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Post by fuegos on Dec 18, 2020 4:16:24 GMT -8
This allows the firebox to be higher up - even at 50 cm from the floor the cooktop could be at standard worktop height - for easier loading and cleaning out. Yup that's teh advantage but teh view of vortex behind the glass is priceless. I'd love to see the Testo results from the matt's core. is it available anywhere? I've heated my home and cooked with woodstoves for 30 + years and for me not having to bend down is priceless ! i can sit down to light my boxstove and the bread oven firebox is 70 CM off the ground.It's all about what you want to achieve - if watching the vortex is what you want to prioritise , fine. As for the testo numbers you would have to ask Matt.My personal view in this is that whilst clean combustion is important as well as efficiency for those of us who don't have a testo we'll never know.Even the smallest changes on any core can have an effect on the numbers and that's before you factor in firewood humidity etc. It would be interesting to know the difference in % between different cores and how the numbers are affected by external factors - operation , delta T etc.Another factor is the size of buildings and insulation .Nearby we have traditional stone houses , some are 100s m2 no insulation vs our small , well insulated cabin. |
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Post by Jura on Dec 18, 2020 10:54:17 GMT -8
Oh, you cant see the sketchup he did? No, I can open and see the model in *.skp file but I just wanted to say that the dimensions skywalker used for the exit port are not the one you had written. Once you decide the setup is is ready for World Wide Release I'm in to sketch it  |
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Post by Vortex on Dec 18, 2020 13:19:26 GMT -8
Yeah sorry, I really need to do an update for the Vortex thread soon. I've been putting it off as I hoped to better understand the recent discovery with the top chamber exit port before writing it up, but then Skywalker asked if there was a sketchup of the core. I pointed him at the one you did and explained the recent improvement I'd found by making the port square. He offered to update the .skp file to include it. That's where the confusion came from.
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Post by Jura on Dec 19, 2020 13:31:57 GMT -8
I sent this question to a acquaintance professor who deals with fluid dynamics.
He is damn busy but sometimes replies to questions of aficionados.
I tried to program the flow of the stream in your setup but there are too many variables and time dependent parameters needed to do it properly.
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