Win a copy of Grocery Story this week in the City Repair forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • r ranson
  • Nicole Alderman
  • Anne Miller
stewards:
  • Mike Jay
  • paul wheaton
  • Joseph Lofthouse
garden masters:
  • Joylynn Hardesty
  • Steve Thorn
  • James Freyr
  • Greg Martin
  • Dave Burton
gardeners:
  • Carla Burke
  • Pearl Sutton
  • Dan Boone

!!!!!!!!!!!! Solar Glass Recycler

 
Posts: 29
Location: Bellingham, United States
74
  • Likes 21
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
A Fresnel lens powered glass recycling contraption was born during the 2019 ATC. Unfortunately, we only got to it on the last couple days and the thing came out very ugly, not to mention that it did not work. I decided to stay on at Wheaton labs as a Boot and get in some additional tinker time!

Problem: Lack of local glass recycling services mean that glass goes to the landfill or is crushed and mixed as aggregate in concrete.

Solution: homestead scale glass recycling! Turn broken bottles and jars into tiles, bricks, dish ware, jewelry, fermenting weights and more. Your imagination is the limit!

Bonus: Make a permanent home for Paul’s ultra dangerous Fresnel lens and melt glass with concentrated sun juice
josiah-solar-glass-recycler.jpeg
[Thumbnail for josiah-solar-glass-recycler.jpeg]
Warning! Extremely bright! Even with these welding goggles I still need to limit my time looking at the action.
 
Josiah Kobernik
Posts: 29
Location: Bellingham, United States
74
  • Likes 11
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
SOLAR GLASS RECYCLER 0.01

The first application caught many wood bits on fire, burned the sand, and managed to melt a 1/4 inch round puddle of molten glass.
The drastic temperature differentials rendered the cooled glass fractured and fragile.

Problems: Very difficult to adjust. The open air environment is not conducive to accumulating heat. It required constant adjustment to keep the focal point on the glass. The resting angle of the lens is 45 degrees, resulting in the front needing to be propped up to face the sun.

We learned that the focal point of the fresnel lens is 35”-36” perpendicular to the lens
solar-glass-recycler-with-fresnel-lens.jpeg
[Thumbnail for solar-glass-recycler-with-fresnel-lens.jpeg]
Style points for the use of baling twine here
fresnel-lens-liquified-rock.jpeg
[Thumbnail for fresnel-lens-liquified-rock.jpeg]
Accidentally liquified some rock while measuring focal length
 
Josiah Kobernik
Posts: 29
Location: Bellingham, United States
74
  • Likes 15
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
SOLAR GLASS RECYCLER 0.2
I was given charge to design the second iteration of the glass recycler as Uncle Mud was occupied with the rocket stove forge project.

I wanted to design something that would be
- Easy to adjust by one person
- An open framework, allowing future modifications without needing to rebuild completely
- A closed and insulated furnace that accumulated heat
- Compatible with future addition of automatic sun tracking.

I decided to build a new wooden framework that would support micro adjustments of the lens height and angle while balancing on a narrow base of 3 legs for easy pivotability. The resting angle of the lens was increased to 60 degrees to match the height of midday sun during the summer here to minimize the need for adjustments. The Insulated closed furnace could then be mounted inside this framework.

It works as intended. The entire frame can be easily pivoted by one person using one hand, while also being very stable. The lens can be raised or lowered by turning the wing nuts on the mounting bolts.

With the frame built I can now move on to constructing the furnace bit. The current plan involves a steel framed, ceramic fiber insulated box with a glass lid that sits parallel to the fresnel lens. More on that later, I’m off to the shop to build the darn thing!
improved-test-solar-glass-recycler-with-fresnel-lens.jpeg
[Thumbnail for improved-test-solar-glass-recycler-with-fresnel-lens.jpeg]
Testing the frame
tilt-furnace-view-test-solar-glass-recycler-with-fresnel-lens.jpeg
[Thumbnail for tilt-furnace-view-test-solar-glass-recycler-with-fresnel-lens.jpeg]
The furnace will eventually fill this space
firebrick-melted-with-glass.jpeg
[Thumbnail for firebrick-melted-with-glass.jpeg]
I accidentally melted some firebrick along with the glass. Oops.
 
Posts: 93
39
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Fantastic. I'm excited to see more.
 
pollinator
Posts: 429
Location: Ashhurst New Zealand
96
duck trees chicken cooking wood heat woodworking homestead
  • Likes 6
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Wow. If you're melting firebrick, what will the crucible need to be made from?

Also, I'm having a tough time refraining from making a really bad joke about this apparatus and keeping it away from Ant Village. Forgive me.
 
master pollinator
Posts: 11206
Location: Central Texas USA Latitude 30 Zone 8
679
cat forest garden fish trees chicken fiber arts wood heat greening the desert
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
This video might help with refinements: Fresnel Lens Solar Power Foundry  
 
Josiah Kobernik
Posts: 29
Location: Bellingham, United States
74
  • Likes 9
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Phil,

I think that the firebrick in the photo melted because the light was very tightly focused directly on it. This is creating too high of temperatures in too small an area as far as I see it.

The first test with the new furnace will be using a slightly diffused beam of concentrated light to try and melt a larger puddle of glass more slowly. We’ll try and use firebrick lined with clay slip for the crucible.

Tyler,

That video is inspiring for sure, I love the use of drills. I hope we can push the ball a little farther in making the lens useful in a practical homestead sense.

The frame is coming along well, a couple more welds and then comes the insulation. We should be able to test it in a few days!
CA11B5F2-A6F7-4DC6-B0C0-262CCF1E5937.jpeg
[Thumbnail for CA11B5F2-A6F7-4DC6-B0C0-262CCF1E5937.jpeg]
The plasma cutter is slick
CE01C649-716C-4FF7-9B46-959B21573829.jpeg
[Thumbnail for CE01C649-716C-4FF7-9B46-959B21573829.jpeg]
The furnace is coming together
 
gardener
Posts: 2681
Location: Central Oklahoma (zone 7a)
544
forest garden trees woodworking
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
In the 1970s when I was a really little kid, I used to receive the Edmund Scientific catalog, which was in those days full of weird military surplus optics plus a few "high tech" modern gadgets.  Prominent in those catalogs were fresnel lenses along with plans to do all sorts of cool and destructive things with them.  But they were expensive and not very big -- it seems to me that the biggest ones weren't much larger than dinner plates.  

Obviously, the state of fresnel lens tech has advanced since then.  I am in awe of the huge one being used for this project, and the manifest evidence of its destructive power.  I'm really looking forward to seeing if/how/whether it can be harnessed into a practical kiln for melting scrap glass!
 
Posts: 24
10
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Over a decade ago my neighbor had one of these large fresnel lenses at their rummage sale.
It was supposed to sit in front of a small TV and make the screen look bigger, ha.
I bought it.
Haven't done anything with it and had no idea it could get so hot.
It'll start a flame on wood as soon as it touches it.
 
Posts: 25
Location: Northern Germany
8
forest garden tiny house
  • Likes 10
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator


I think the lens requires constant precise tracking to keep the focal point heating a specific area for hours.
 
Phil Stevens
pollinator
Posts: 429
Location: Ashhurst New Zealand
96
duck trees chicken cooking wood heat woodworking homestead
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Love the video, Ralf.
 
Chris McClellan
Posts: 93
39
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Here is a video of the first attempt on the glass recycler before Josiah started on the improved model.

 
Posts: 34
Location: Southern California
9
trees bee greening the desert
  • Likes 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
this could use a scrounged satellite dish for sure.
 
master pollinator
Posts: 395
Location: Near Missoula, MT
284
hugelkultur hunting books wofati chicken fiber arts bee building sheep rocket stoves homestead
  • Likes 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Here are the Photos from Thursday July 18, 2019






















 
pioneer
Posts: 146
Location: California Coastal range
35
homeschooling goat kids food preservation fiber arts building solar wood heat homestead
  • Likes 7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I think diffusing for a lower temperature is a good idea, get down to the temperatures that fused glass kilns use.  Also, grind the glass first if you can to get a more uniform product to remelt.

I have glass tile, seconds, from a local place that was commercially selling glass tile made from recycled glass.  They are no longer doing this, but did it for years, one of their lines was specifically CRT glass tiles so had the color imparted from the CRT screens, a nice smoky color.  

They ground the glass and then it could be poured into molds, in many cases colorant was sprinked on top, but the clear ones are very cool too.  each had an individual mold so the glass was melted in the molds, not melted and then poured in hot.  They used I think styrafoam for the molds, not sure,  likely a more eco mold could be made, but overall as the molds were used for a long time and all the glass was recycled glass, it was a more low energy/waste opperation than the typical glass tile operation

IMG_0361.jpg
[Thumbnail for IMG_0361.jpg]
IMG_0051.jpg
[Thumbnail for IMG_0051.jpg]
 
pioneer
Posts: 1040
Location: 4b
181
dog forest garden trees bee building
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I have a bunch of fresnel lens sitting around waiting to be used for something.  You can get very large ones for free nearly every day.  Just go to Craigslist free stuff and look for projection TV's.  No one wants them anymore because the quality isn't good and they are huge, but the fresnel lens is right on the front and very easy to remove.  I heard of a guy that took one out, leaned it up against his garage in the sun, and burned his garage down, so be careful.  

Craigslist today in Minneapolis:





TVs.JPG
[Thumbnail for TVs.JPG]
 
Phil Stevens
pollinator
Posts: 429
Location: Ashhurst New Zealand
96
duck trees chicken cooking wood heat woodworking homestead
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Could you "turn down" the heat by moving the crucible away from the focal point in either direction? Spreading would be the same as diffusion and reduce the problems caused by the concentration in the hot spot.
 
Josiah Kobernik
Posts: 29
Location: Bellingham, United States
74
  • Likes 7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Sue,

Those tiles are beautiful. Paul is dreaming of making tiles similar to yours and using them as roofing material.

Phil,

That’s the plan



The steel frame is ready for ceramic insulation and the glass lid.
F6FE6F48-FBBE-444D-BC2F-C087FD73CFFA.jpeg
[Thumbnail for F6FE6F48-FBBE-444D-BC2F-C087FD73CFFA.jpeg]
My welding skills are improving by the minute
46682FAF-47F3-467E-8F5F-0F82AA60FDB5.jpeg
[Thumbnail for 46682FAF-47F3-467E-8F5F-0F82AA60FDB5.jpeg]
It fits!
 
Sue Reeves
pioneer
Posts: 146
Location: California Coastal range
35
homeschooling goat kids food preservation fiber arts building solar wood heat homestead
  • Likes 8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Yes, the shower looks good,even though it is far from perfect, all the tiles are seconds and we have "interesting" grout surfacing.  But, it is almost done and will be nice to have a shower again.  Shower floor is from a local non-profit, the manufacturer donated to them so we are all keeping it from teh waste stream, and same for the recycled glass tiles in the shower walls, the manufacturer was discontinuing that line, they were seconds, and they were moving the entire production facility so buying them kept them out of the waste stream, and they were locally made from recycled glass ( also it was all very affordable being extras and seconds, etc...)  The rest of the tiles are about to go to a local lady who does mosaic work, so none should go to the waste stream, I hand picked the "best" of the flawed galss tiles for the shower, and she will make art with the rest.  
IMG_0362.jpg
[Thumbnail for IMG_0362.jpg]
shower wall
IMG_0359.jpg
[Thumbnail for IMG_0359.jpg]
off to make art
 
steward
Posts: 28075
Location: missoula, montana (zone 4)
hugelkultur trees chicken wofati bee woodworking
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
not sure if this helps



 
paul wheaton
steward
Posts: 28075
Location: missoula, montana (zone 4)
hugelkultur trees chicken wofati bee woodworking
 
Posts: 290
Location: Harrisonburg, VA
5
  • Likes 6
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I fuse glass in kilns.  I have a few thoughts that may or may not help.  If the collector could be used to heat a plate of salt that could then be used to heat a kiln with an electric controller to take the temp to apx 1500 f it would grant you control. Keeping the glass at 950f for an hour after melting will anneal the product. I'd personally try to take an old ceramic kiln and retrofit it with a heating plate that could be accessed by a diagonally drilling into the kiln.  I'm not sure how a controller would work but being able to anneal the product when you're done is mandatory and keeping control over the glass temp is as well.  
 
gardener & bricolagier
Posts: 2647
Location: SW Missouri
789
goat cat fungi books chicken earthworks food preservation cooking building homestead ungarbage
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Josiah: Nice work!!!  :D
Do you know if that's a fresnel off an old TV? The ones I have that came off TVs are some sort of plastic, am I dealing with the same things you are, or is that a nicer one than mine are? Curious if I'll get the same effect, wondering how much of your work I can avoid repeating :D
 
Josiah Kobernik
Posts: 29
Location: Bellingham, United States
74
  • Likes 11
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

David,

I agree with you that standard glass or ceramic kilns work well and I think retrofitting one is a good idea. One of the questions that we are asking here is if we can build something relatively simple that works. Our design is a unique approach that I can’t find examples of elsewhere and it is so simple that it would be a shame to not give it a try. I suspect that we will not achieve “optimal” temperatures for fusing and annealing, however, we may still achieve success. Hopefully a future prototype will include a method for more precise temperature control.

Pearl,

Thanks! Paul’s Fresnel lens is made of plastic. It was acquired from the folks at green power science but I think they pulled it out of a TV. If I were you I would wait to see the results of our experiment before you do too much copying!

Got some time in today with the tile saw and the furnace is now lined. So many compound angles! Now we are ready for external insulation wrap and the glass lid.
EAF97A86-292A-473A-8266-563D0C5C9A01.jpeg
[Thumbnail for EAF97A86-292A-473A-8266-563D0C5C9A01.jpeg]
Probably the largest tile this saw has seen
B95CEE32-6718-4328-AB0E-5100F3173F8E.jpeg
[Thumbnail for B95CEE32-6718-4328-AB0E-5100F3173F8E.jpeg]
Nice and tight
9C8F19A3-3D05-46E6-A704-E5409CCCE0AF.jpeg
[Thumbnail for 9C8F19A3-3D05-46E6-A704-E5409CCCE0AF.jpeg]
 
garden master
Posts: 1167
Location: Maine, zone 5
341
forest garden trees food preservation solar wood heat homestead
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Looks really nice Josiah!  How far will you keep the plastic Fresnel away from the cover glass?  Just thinking that you don't want to be close enough for thermal radiation from the cover glass to soften the plastic Fresnel.  Not sure how hot the glass will get.
 
Josiah Kobernik
Posts: 29
Location: Bellingham, United States
74
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Currently the setup will have a 3.5-5.5 inch gap between the two depending on how focused the lens is. I hope that’s enough for convection to cool the Fresnel. We shall find out
 
Posts: 60
Location: Wichita, Kansas, United States
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

Ralf Siepmann wrote:



I think the lens requires constant precise tracking to keep the focal point heating a specific area for hours.



You are correct.
The sun moves one degree about every 4 minutes.
 
Phil Swindler
Posts: 60
Location: Wichita, Kansas, United States
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

Trace Oswald wrote:I have a bunch of fresnel lens sitting around waiting to be used for something.  You can get very large ones for free nearly every day.  Just go to Craigslist free stuff and look for projection TV's.  No one wants them anymore because the quality isn't good and they are huge, but the fresnel lens is right on the front and very easy to remove.  I heard of a guy that took one out, leaned it up against his garage in the sun, and burned his garage down, so be careful.  

Craigslist today in Minneapolis:







You are correct about that source of fresnel lenses.
I got my 18" by 36" fresnel lens out of an old projection TV.
 
Posts: 56
Location: The Netherlands
4
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

Josiah Kobernik wrote:A Fresnel lens powered glass recycling contraption was born during the 2019 ATC. Unfortunately, we only got to it on the last couple days and the thing came out very ugly, not to mention that it did not work. I decided to stay on at Wheaton labs as a Boot and get in some additional tinker time!

Problem: Lack of local glass recycling services mean that glass goes to the landfill or is crushed and mixed as aggregate in concrete.

Solution: homestead scale glass recycling! Turn broken bottles and jars into tiles, bricks, dish ware, jewelry, fermenting weights and more. Your imagination is the limit!

Bonus: Make a permanent home for Paul’s ultra dangerous Fresnel lens and melt glass with concentrated sun juice

While it's always nice to faff around with a fresnel lens and the sun, are you looking in the right direction for a solution?
If the problem is a lack of local glass recycling, I might argue it's better to find out why and try to solve that so the whole region has a place to recycle glass instead of setting up a fresnel system to melt glass in a, let's be frank labour intensive and inefficient way.
 
Josiah Kobernik
Posts: 29
Location: Bellingham, United States
74
  • Likes 15
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Yes, why indeed is there no glass recycling in Western Montana? I didn’t bother to ask.

In reality this project is innovation for innovations sake, which is always a long shot. However, that‘s what the lab is for.

Is it labor intensive and inefficient? Isn’t innovation always that way? Even if there were glass recycling out here, it would need to be trucked hundreds of miles away for processing. Alternatively, if someone does successfully innovate a process by which glass can be recycled in their backyard using only the sun, that sounds very energetically efficient. If that process is worked out, then prototypes that reduce the operator labor will follow. Maybe in the future each town or community will have a solar glass recycler. Or maybe it will be a dead end, who knows?

TINKER ON INNOVATORS!!!
 
Posts: 17
1
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I like the concept that it’s worth the effort, even if it results in a dead end. What you never know is if your dead end (should that be the case) may be someone else’s inspiration. Here in Alaska there is also no glass recycling, due to the lack of processing, meaning the glass would have to be transported to the lower 48 (or Asia?), both cost prohibitive, despite many trucks returning down the Alcan empty and ditto for barges returning to Seattle. Which means it’s simply not profitable to anyone here, not that it’s not feasible or a good idea ecologically.
You initially mention it being used there in concrete. Not sure if that’s been considered here, but why is that not a good use for it? I’ve also seen it used in asphalt.
 
Phil Stevens
pollinator
Posts: 429
Location: Ashhurst New Zealand
96
duck trees chicken cooking wood heat woodworking homestead
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Glass as aggregate is becoming the "highest and best use" in a lot of places where sand and gravel are getting hard to come by. Globally, the construction binge of the past half century has made decent quality sand a rare and valuable commodity. Kind of crazy to think that we've spent the energy turning sand into glass only to turn it back into sand. Arguably, if all you had was beach sand and needed something better for building, turning it into low quality glass and then crushing it would make sense. Especially if you had lots of sun juice and some time on your hands....
 
Posts: 46
1
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Years ago I attended a conference on sustainability and one of the speakers message was on the myths of recycling, which was that for the most part recycling wasn't sustainable. It upset me and the audience but unfortunately it's true. So I added a 4th R to the recycling mantra. Refuse! Refuse to buy single use glass containers (etc.)!    
 
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

Josiah Kobernik wrote:A Fresnel lens powered glass recycling contraption was born during the 2019 ATC. Unfortunately, we only got to it on the last couple days and the thing came out very ugly, not to mention that it did not work. I decided to stay on at Wheaton labs as a Boot and get in some additional tinker time!

Problem: Lack of local glass recycling services mean that glass goes to the landfill or is crushed and mixed as aggregate in concrete.

Solution: homestead scale glass recycling! Turn broken bottles and jars into tiles, bricks, dish ware, jewelry, fermenting weights and more. Your imagination is the limit!

Bonus: Make a permanent home for Paul’s ultra dangerous Fresnel lens and melt glass with concentrated sun juice


This is amazing! What possibilities are there for large applications...solar power for homes, communities, etc?
 
Chris McClellan
Posts: 93
39
  • Likes 4
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Jon unless you are firing your own clay pots to put your home grown food into you are going to need some kind of container. Glass is better than plastic for a lot of things. I like the idea of minimizing consumption, but I find it often challenging. I am excited by this idea not because I think it is practical or that I think it will work how we are hoping it will work, but because we need to unnormalize the casual use of energy intensive materials and processes and really good way to do that is to understand the scale of our casual industrial use by comparing it to what we can gather naturally (like from the sun) with home made apparatus and scaling down much of our use to fit what we know we can produce nontoxicly while we learn to make better apparatus
 
Posts: 66
Location: north texas 7b now 8a
fish fungi trees
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
When you do get the contraption melting glass well, you will need to anneal it to keep from cracking. The  possibilities of using a rocket stove to anneal are plausible. just thinking ahead
 
Posts: 2
1
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I have been a recycled glasd artist for over 10 years.  I have made tiles, jewelry (beads and pendants), and loads of stained glass items all out of re ycled glass of various types.   Anything over 1/2" in diameter will need to be annealed.  I worry about javing a glass top for the kiln as it to will heat up, but it will only heat up on one side and that uneven thermal expansion will most likely cause it to crack.  I would use a very small insulated kiln with a thick stainless steel  plate for the top. Use a pyrometer from an electric kiln to monitor the temp.  With your extreme  temperatures the plate should heat what is inside without direct contact with the light.  The best fusing kilns heat from the top anyway. Remember that when fusing glass you can't use different glasses from different sources because they won't have the same coefficient of expansion (look that up). If you want to combine different colors of glass bottles, the only way to do it is to crush the glass to sand size and mix it really well. That way the glass will all expand and contract evenly
 
Posts: 63
Location: Western Pennsylvania Zone 6A
2
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Annealing glass of any significant thickness much over 1/4" thick requires relatively precise and constant temperatures and specific hold times at various temperatures depending on the type of glass. Not saying it can't be done with a rocket stove but I think it would be pretty hit or miss. The thicker the glass the more important all those parameters become.
 
Julie Reed
Posts: 17
1
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
From all the comments on the finicky specifics, it seems like this may not be a feasible way to recycle glass. Having done some brief research into this over the past couple hours (since I could have thousands of tons of it for free probably) it seems like the cost to crush and recycle glass, even if used as aggregate in concrete, is higher than the value of the end product. The most efficient path seems to be re-using the glass product for the same purpose as it was originally. The problem then becomes cost of handling, transporting, cleaning, inspecting for cracks/chips.
Hopefully better ideas are out there.
 
What's that smell? Hey, sniff this tiny ad:
permaculture bootcamp - learn permaculture through a little hard work
https://permies.com/wiki/bootcamp
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!