Walipini Design and Analysis
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- čas přidán 26. 01. 2014
- www.onecommunityglobal.org/aqu...
Different proposed Walipini designs shown modeled during both solstices. Calculations of solar heat gain and heat loss during the night as well as the total heat gain - heat losses over the entire day to give total heat losses and gains over the course of a day.
*For the truss-type design the heat loss at night is given assuming that the insulation hatches would be covering the windows (Lexan) at night.
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Awesome work
What numerical model did you use to calculate the heat gains/losses?
I saw an interesting one on youtube with a round, reciprocal roof. I'm curious to know what the numbers would be on a set up like that.
A walipini is on my to do list this summer. It gets cold in south dakota. I would love to see more on the insulation process in your hatch system.
We're currently waiting on development of a better system using a wall filled with bubbles for insulation. This would give the option of shade in the summer too. My guess is we're about 6 months to a year away from demonstrating it though. Still, depending on how warm you want to keep it inside, you could probably get away with something much simpler and cheaper.
Jae Sabol Thanks for the input. I was looking at a manual by the Benson ag and food instate that discusses angle to prevent refraction during the winter (letting ore light in) and promote refraction during the summer. Going by there math, In Sioux Falls, sd here, i would need to have my south facing wall at a 69degree angle which would fall more in line with your latter designs for heating. vs the traditional 39 or so degree method. at that 39ish or less degree angle here you would not get much light into the bottom of your walipini which would prevent the plants from growing in my limited understanding of plants. your diagram very much intrigues me. thanks for the vid
irnative Yes, we also added in skylights. We still ran into sunlight issues in the winter though. The solution would be the bubble wall, it's just not developed enough yet though to be practical. We continue to wait...
Jae Sabol Can you point to any good research starting points, information already out there, for the 'bubble wall'? Or is this an approach you are inventing as you go? Any progress at this point?
ellsworth The bubble wall is being developed by others. SolaRoof is one, there is also a university with a government grant that has done extensive research. The problems are still greater than the solutions though, so we're waiting for more development before attempting a prototype of our own.
Please note that the above calculations, in all cases except the complete glazed roof, are taking into account a hatch system we are designing that will allow us to insulate the entire structure at night. The complete glazed roof does not include this because it would not be possible with that design.
What was the software used? looks like sketchup with a plugin?
any news on that?
Whats the average temperature in the winter over day/ night?
This video shows what we learned when comparing different designs for heat loss/gain efficiency. We no longer have the specifics of the temperatures used but the ranking of most to least efficient will be the same for any location.
perfect!
It's still got a long way to go in the way of effectively insulating and venting it to create the tropical environment we need in the winter without it overheating in the summer.
@@OneCommunityGlobalOrg long way to go hey ? Obviously there's other elements. But just for basic physical design its the best layout
@@awokenv7302 We think we've improved them. The updated designs aren't on the website yet but you can view them on this Google Doc: docs.google.com/document/d/1VcLrCqzXX0LlXpddb_atwY2ImG6vhjVZqstjPs4Hio4/edit Nothing's final until we build it though, and considering we posted this video over 7 years ago, it may change again. We continue to make progress. You can follow the details with our weekly updates if you are interested: www.onecommunityglobal.org/one-community-blog/
is there a clear winner here or does it depend on the needs of the location ?
Berms are utilized to capitalize on the insulating properties of soil, which is fairly average when not below the frostline. With this in mind, this study* was done to determine if the sun we’d get from leaving parts of the East and West transparent would be better than covering these areas with berms. Berms proved to be better than the added sun and the video shows our studies to demonstrate this.
Please note that the calculations in the (older design) video above, in all cases except the complete glazed roof, are taking into account a hatch system we were designing that would allow us to insulate the entire structure at night. The complete glazed roof does not include this because it would not be possible with that design. Even though our updated design is now different from the one shown in this video, the analysis demonstrating the benefits of berms vs. no-berms on the East and West walls are still valid.
@@onecommunityorg Thank you so much for this explanation! This makes a lot of sense. Much appreciated!
Glad we can help :)
So what’s the summary?
Please see the related webpage: www.onecommunityglobal.org/aquapinis-and-walipinis/ Additional updates have been made and should be added to that page soon.
Why don't they build houses like this? I don't understand all the numbers. But heating and cooling costs are reduced. There's minimal outside walls to maintain. Every room would have natural light. You could have heavy automatic horizontal curtains at the ceilings to minimize heat loss or gain plus ensure privacy.
They are building them like this, Google "Earthships." Amazing technology and sustainable approach to living.
Big holes are expensive.
The walls are significant, because the earth pushes against them. They must be heavily braced.
@@jesshansen1397 How do you recommend bracing the walls?
@@Diypics my soil is clay so I will get less soil push. I used 4 x 4 posts every 4 feet, with treated plywood behind it. Then I covered the plywood with plastic then home wrap to keep water off of it.
Data sheets are useless. Too blurry to read. Such a shame because it seems like it might have been good to know about.
Which sheets are you referring to? Everything is clear and legible from what we can see.
hmmm - I wonder why mine is so blurry? That's not fair. You get clear and I don't. Oh well. All the same, I know you put a lot of work into this. Wish I could read them. I'll check out all your extra information provided and see if I can get it from there.
It's most likely your video quality setting in the bottom right corner of the video. If you have a poor connection it will default to a lower quality.
Oh, that's probably it! I do have some problems with a continuous quality connection here in China.
TOO incomplete!
What about the depth of your ground subsurface area" VS level ground exposure, This plays a huge part in the thermal aspect calculations!!!
You need a storage element such as water barrels for thermal retention during cold cycle window, where is this in your calc?
The type of clear opaque windows , thickness, volume and clear glass such as 4x4 sunlight windows factor?
What about solar panel to heat this area up in day that values added Into the Frey?
What about the fans that mix the atmosphere?
What about the air humidity aspect of this water grain impact on thermal transfer/loss time and amount???
Sorry, this is way to incomplete for use .
All good points. This was just to compare the different designs shown.