Insulation that STORES energy! | Phase Change Materials
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- เผยแพร่เมื่อ 15 มิ.ย. 2024
- Have you ever wondered how ice keeps drinks cold?
As the ice cube melts, it absorbs heat or thermal energy from its surroundings. The molecular vibrations of the ice increases and the cohesive bonds between the molecules break apart, which forms water. During melting, the temperatures of both are also the same and don't increase. That’s why the drink stays cold.
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Chapters
0:00 Introduction
0:42 Phase Change Insulation
1:50 How it works
2:45 Advantages
4:50 Sponsorship
5:31 Uses
6:28 Disadvantages
7:04 Conclusion
Conversely, when water turns into ice, work is done by cohesive forces to bring the molecules closer together and reduce their vibrations. Energy or heat is released to allow them to stay together. This is called the latent heat of freezing.
Phase change insulation comes in panels measuring 4′ x 1.5′ x 3/8″. They weigh less than 1 lbs per SF. The outer covering is made of conductive materials like thick aluminum foil. They hold separate cells of squishy phase change material or PCM.
There are 3 main types of phase change materials:
Organic materials like paraffin wax or non-paraffin like fatty acids, esters, alcohols and glycols.
Inorganic materials like salt hydrates and metal alloys.
Eutectics which are a combination of organic and inorganic materials
This material works in 3 stages during the day.
Absorb - When the sun rises in the morning, the semi-solid phase change material starts absorbing thermal energy to melt.
Store - Throughout the day, the material continues to melt. It absorbs and stores up to 100+ BTU per square foot.
Release - During the night, the phase change material prepares for a new day by returning to its solid state.
Traditional forms of insulation like fiberglass, rockwool and foam resist the flow of heat by conduction, convection or radiation. Phase change insulation operates differently. They capture and store thermal energy or heat. In summer, they slow down indoor heat gain and in winter, they slow down heat loss.
It has excellent fire resistance. Both the interior paste and aluminum film didn't catch on fire. It has a Class A Fire safety rating, Flame spread of 5, Smoke developed index of 5.
The product is self-healing. In case a pocket is punctured, the material inside develops a thin, hard film that prevents the rest of the material from spilling out. The product is estimated to degrade less than 2% over 100 years. It comes with a 30 year warranty and guaranteed 20% energy savings for certain homes or buildings. This leads to lower CO2 emissions and lower water consumption. Its outer layers are recyclable and the inner components are non-toxic to both the environment and humans. It is odorless, it doesn’t off-gas or release any VOCs or volatile organic compounds.
It is very easy to install this insulation. It is pliable, lightweight, and easy to handle. It doesn’t require any prep work, clean up, maintenance or extra machines and tools. It lays directly on top of existing insulation in attics, or on top of suspended ceiling tiles. It doesn’t need to be mechanically fastened with staples.
Like with every product, there are some disadvantages. These mats don’t replace traditional insulation. They are used as a supplement. A pretty expensive supplement. They cost $3.50 per sq ft, but the price is expected to come down as production scales up.
Phase change materials work best in temperate climates. They need to have moderate to large variations between daytime and overnight temperatures. They don’t work well in coastal tropical regions where there is little variation between daily temperatures.
Phase change materials are not a silver bullet for better building performance. You have to consider the building orientation and available solar gain. They should be used with other energy efficiency measures, like improved levels of insulation, reducing drafts and efficient glazing.
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#phasechange #science #insulation #buildingscience #construction - วิทยาศาสตร์และเทคโนโลยี
I would like to see that light bulb experiment done with the left chamber having an empty foil packet to eliminate the foil reflectivity of heat variable.
Great point! I can try to conduct that experiment on my own.
I really like your informative videos. Maybe you can help. We have a 2015 Winnebago Trend 23B motorhome. We would like to travel more and not be limited by the outside temperatures forcing a move. Currently, we are in Florida fear is the humidity and rising heat will be too much. We would like find a better way to keep humidity and heat out of the RV. A lot of the heat is transfers from the metal frame windows which are single pane. Maybe we could come up with a coving or upgrade for RV windows and insulation.
@@BelindaCarr I would also love to see that! Please do
Or perhaps a foil packet with the same weight of water within to eliminate normal specific heat capacity effects.
@@vickiretzlaff5009 you didnt comment in the right place for her to see it but also i think youd have more targeted answers from the rv community
Back in the ‘80s I worked on a satellite earth station project where the equipment was installed in a little radio shack with walls and roof of phase change material. In Algeria. I always think of that as the perfect environment for it; high solar gain and fast nighttime cooling. All the equipment ran on batteries so it was essential to have a passive way to keep the electronics in the nominal operational temperature range. I am glad the technology is finally making it out of little shacks in the desert.
Good video… I would like to see a bit more explanation of ideal use cases vs non ideal use cases though. I like getting these introductions to new products but I want to know more now!
I'll make follow up videos on other PCMs!
Agree with Eric B. I'd like to know what the ideal/min/max temperature fluctuation needed would be, and if different roofing or exterior materials would effect its use or effectiveness.
I was away from your channel for a long time and forgot what your name was. I wanted to find your channel again, so I typed "container homes" into the search bar and... it worked like a charm)
Now that's a cool video :). Really nicely edited and as usual nice presentation of facts (both advantages and disadvantages). As a suggestion, as a European viewer I would really appreciate if you could also specify data in SI units (100 BTU/sqft =~ 0.3 kWh/m2).
Thank you! I will try to convert all the data in the future.
Thank you, saved me the same comment.
@@BelindaCarr It will be greatly appreciated! The metric system is so much easier for us to understand.
@@stephanemandelert4321 yes and it infuriates me. The imperial system is ridiculous. Utterly incomprehensible.
Counterpoint; the Celcius scale only has 100 points from freezing to boiling which is roughly half of the Fahrenheit scale of 32 to 212 so it is more descriptive to go Imperial unless you always use 3 digits for the Celius measurements. Just my two cents (which is a decimal-based measure)
I have to wonder if, given the organic nature of the soy bean oil, the sheets featured encourage the infestation of pests like rats, mice, squirrels, or other rodents who are both capable of tearing through the material and have a keen sense of smell (many times greater than even the dogs used by police).
QE P, actually utilizes inorganic based PCMs. In turn, our products are not a food source for vermin. Patented formulations are primarily composed of clays, salt complexes (not table salt), and a H2O. Formulations are hydrophobic in nature, so no puddling or oozing if punctured. The PCMs will dry out when exposed to open air.
Interesting technology, I imagine it would be well suited to desert climates, where day / night temperature variation tends to be high
Formulations are tailored to climate zone, elevation, and human comfort range. This allows us to dial in PCMs to the needs of our customers!
Perfect! Where I live winter lows are -40° and summer highs are 100°, with wild daily temperature swings from night to day in the spring and fall! Not only that, my roof is oriented for maximum exposure towards the southern sky! I’m going to have to dig into this product more! Thanks!!!
Where on earth do you live?
@@karl810 A wonderful place known as The Great Plains, up in the northern parts A windswept prairie as far as the eye can see!
@@brainwashingdetergent4322 oh I am shocked, I expected somewhere much further North, I didnt realise it could even get so cold there, im assuming Google gave me the correct great plains anyway, im a non American.
@@karl810 it can, and does! It gets even a bit colder in the Canadian provinces just north of me. I’m pleased you learned a fun little fact!
@@brainwashingdetergent4322 Even then, I assumed the livable parts of Canada never got that low regularly, I watched a documentary once about about an extreme northern Russian town and the additives they needed to add to everything, even fuel, to stop it freezing in winter and im sure they said it was "only" -28 each winter. i couldn't imagine -40, Do you also have car troubles?
I live in Northern England and the lowest we've ever had was -18, once, which seems strange considering how far north we are in comparrison, though we do have the tail end of the gulf stream to keep us a little warmer.
Im glad to have learned it, so thank you.
It is important to analyze in each case if there is benefit. This material can degrade overall energy costs or improve costs. Just like acoustic materials in cars, you have to understand and analyze the benefit. This requires accurate finite element thermal simulations.
That insulated foil reveal though 😎
Squish squish squish!
My experience with PCM is that it's not an insulation per se. It is, however, a thermal battery.
I've used them in my greenhouses.
As long as they are in the space, able to absorb heat, and release the heat, they work ok, enough to keep the plants from dying from freezing.
They do not work well behind insulation, as the insulation does what it should, insulate.
I also found that they are typically inefficient at collecting energy, and I painted the surface black, then they performed better.
The next issue is, they are not thick enough, not enough thermal mass to last long.
The price needs to come WAY DOWN, and be much thicker, denser!!!
Then and only then could it really be found to be truely useful for the masses. Pun intended.
They aren't designed to work behind insulation
@@Rokomarn , I don't understand your reply. Were you just repeating what I'd already said to emphasize what I had already said, or did you make that comment as a reply not realizing I'd said that?
@@blueside1999 why would you say they don't work well being insulation? That's not how they are supposed to be used but for some reason you say that's a problem with the product.
Blueside, do you have further details of your greenhouse application? Would you do it again? If you were to use PCM again, how would you use it for your greenhouse? Which specific material did you install? What about using the material in some sort of plenum for an air circulation system, where you could design the material thickness and gets lots of airflow over the material?
I bought a very expensive ski jacket by Kiily that had this tech in a layer of the jacket.
It is by far the best ski jacket I've ever known.
The temperature is regulated wonderfully. It's spooky.
This tech is real and I hope it makes the mainstream soon.
£1000 jacket bought for £250.
Best buy ever.
Killy Black Knight.
Luv and peace.
I love it when I learn something new. Awesome video.
A true professional, well done.
I love watching your content. Unlike most things available to watch these days, your videos leave me feeling smarter and not dumber.
This offering is AWESOME WORK and GREAT DETAILS TOO! YOU SHINE ! a big THANK YOU from. Canada. J.
One of your best videos. Thank you..
Thank you for the transcript in the video description, it's really useful. A+ video.
Excellent vid! I came across this material while researching a Trombe wall and solar chimneys.
Excellent review. Thank you
Another clear and informative look at a fascinating way to save energy. Thank you.
Finally!
I was wondering for a while now why such product was not on the market!
it's not the first of its kind either....
Thanks for your videos and giving your honest opinion or best opinion on all the products or building methods.
found this through undecided with Matt Farrell.....interesting that you note this is a supplement to insulation rather than a replacement so his cost comparison is not valid. will take a look at some of your other videos, but already liking the clear delivery of information...
Haven't seen a vid of yours that I didn't like. Thanks for bringing insight to so many products!
Thank you!
Nice thanks for that informative video!
Looks like it'd be good to use in RV's/campers that are insulated but thin walled.
Your awesome! These videos are really good. Thank you. I hope Texas is treating you good. My family and I moved here from Long Island in the 80s. I loved DFW but my parents didn't so we moved to the coast
This is actually really cool!!! Never considered this, have thought about thermal mass, and insulation,
But this is a really efficient way to get “thermal mass” with much less volume. Really clever idea, hope it works!
I saw something about using phase change beads in drywall a couple years ago, but it hadn't made it to market as a buyable product yet. There were some issues with flammability in what they were using. It's nice to see they've worked it out and it's getting into the market. Basically, it's like thermal mass, only even easier to tune to a desired temperature range.
I love your videos! I would have never heard of this before.
Always love to watch smart women, love smart women.
Excellent content.
Wow, you're a true ally.
Great video! One thing you left out is how PCMs can improve the efficiency of air source heat pumps by allowing them to operate during the warmest outdoor air temperatures in winter and during the coolest outdoor air temperatures in summer. This requires a level of programming that thermostats don’t currently have, but you can sort of fake it with a schedule. If PCMs become more popular I hope they will add this ability as any easy to use feature in the future.
Hello from Undecided with Matt Ferrell! Great video!
I really enjoy your videos, and appreciate the broad range of materials reviewed. I find the phase change material a fascinating concept. I am wondering about a sustainability rating. . Raising crops for non-agricultural purposes has several environmental consequences - e.g. water, fuel, fertilizers - every great idea does have a cost we need to calculate and consider.
Really Good
Great as always! I would love to see some pros and cons from actual use in buildings. They are very expensive. Perhaps a diy video? :)
This is the kind of stuff we need! I am impressed! Smart to make it out of soy based products, since soy is already federally subsidized for livestock feed.
So phase transitions are associated with a separate energy and entropy that defines the energy difference between the two states of the transition. One issue will be finding and tuning the temperature or temperature range for a given application, as well as other factors, such as heat capacity and transfer rates.
You’re exactly right Gaurav. This work has been done and can be adjusted for edge case scenarios.
Very interesting & I am thinking about whether it could be used in retrofitting our small (1br) cottage in North Norfolk (UK). Think probably not in this instance, but PCM do look very interesting & I love your channel.
This looks awesome, but I need more hard facts. You said that is not suited for tropical or coastal climates because it needs a large temp swing to work. How big of a temp change? 5 degrees C? 10? My house experiences a 15-degree swing during the dry season. Also, since it's puncture-resistant I think that it can sit under the galvanized roofing to provide some insulation just fine. The temp under there might jump to 50 C though.
Hi Belinda, I appreciate the effort you put into your videos, they have been very informative. I have an application idea for this PCM and wondered if you could point me to where I could find information on how to manufacture the substance? Thanks Peter.
The phase change process definitely has it's worth. This just seems like individual meals for the critters.
Hi James! QE P, actually utilizes inorganic based PCM formulations. None of which are a food source for the critters.
@QE Platinum - Phase Change Material Thanks for clarifying. I seen that there are three kinds organic, inorganic and eutecties. The organic and the eutectic products contain soybean oil. Wich made me think of the soy based wire coating that mice love to eat.
This is fascinating. This could work well in a tiny house…shed….cheap structure.
Could this be used in vans for nomads
You are correct!
Oh wow that is so Smart
Thank you for your education, I got here from Undecided.
As a building designer, I have been aware of this product and the science behind it for some time now. It should be noted that this product works best when in contact with the habitable space inner layer (plasterboard). So retrofitting or laying the product on top of the ceiling insulation is not ideal as it will compress the insulation and reduce system performance. The reflective foil packaging IS however best suited to being on the outer layer of insulation system, so perhaps it would be better to enclose the product in a cheaper medium and use a separate foil layer where it would be more effective. Building science is a tricky ever evolving subject, and there is no single magic bullet for every scenario. But I love PCM for its ability to add huge 'smart' thermal mass potential to an otherwise light building system. Cheers.
Hi Belinda, a very helpful video. Your explanation is unbiased, giving a rounded view of the product and the science behind it. On a completely different note, I am an author, and your name is one of the characters in my latest novel.
Thanks for your kind feedback, David! Would love to check out your books. Can I buy them on Amazon?
Watching Undecided with Matt Ferrall and he recommended I check out this video. Yep yep good recommend. This is cool stuff. Thank you for the incredible thorough review.
I'd love to see a detailed presentation on what applications PCM is best for.
Hi Belinda. Perhaps I missed it, did you happen to mention a source for this insulation? Great video. Thank you.
That would be great.
Need to see if it's affordable in Canada when I redo my roof.
I'm not familiar with that particular PCM product, but one of the things that confuses/irks me about the PCM products that I've seen come to market over the last decade or so is that they are formulated to have a single phase-change temperature. I don't know about everyone, everywhere, but _I_ and most everyone that I know doesn't have the same set point for their heating in the winter as they do the AC in the summer (and that's not just because of energy cost, comfort is also a factor). I'd like to see a PCM product that has 2 phase-change temperatures to accommodate a range of temperatures that you want to stay between (i.e. a comfortable high and a comfortable low).
Considering the weather here in the last three days. I put extra insulation in but now I want more cause I don’t do well in freezing weather!
Can this be used as thermal mass in a passive house?
Instead of Aluminum, you should use the material of a rescue blanket: golden on the outside and silver on the inside
Aluminized mylar - which is what the rescue blankets are made of - might be problematic in this application. Mylar, being a plastic, may be degraded over time by the oils contained in this particular product. With a different phase change material, though, it might work.
@@JohnDoe-zl6qw thanks for the insight
I think you could have done a better job at explaining the enthalpy of fusion. The necessity of temperature fluctuations is due to the method of action: the phase change. The cells don't "recharge".
As an example, to melt 1kg of 0º ice to 0º water you need 334 kJ! That's enough to heat up 1kg of 0º water to a scolding hot 80º!
And 1230 for supercritical water. They should be working on that instead of these piddly couple hundred kJ
Nice ! Could you do a review on seasonal thermal storages and thermochemical ones, like zeolite, calcium chloride and sodium acetate ? It's underrated !!
Hmm, it sounds like this material would be perfect for the climate in the Central California Valley where the temperature differential in summer can be quite drastic and the number of days of extreme heat seems to be lengthening. I might have to seriously look into this technology.
Informative video!
Where will I be able to buy this? I need it for a small project.
Interesting but I'm skeptical. PCMs came out in the clothing insulation industry 30 years or more ago. The problems then were that the PCMS were paraffin based and were flammable. This doesn't seem to be flammable, great. But another problem was the time factor. That is, how long does it take for the liquid phase take to go back to the solid phase and vice versa?? If it takes only 1/2 hour or so, then while it helps, it isn't spreading the effect for a very long time. AND as you point out, it is quite expensive. It turned out to be much more of a gimmick than it was useful. I think there needs to be a real test on a system, installed as you suggest, to see what the difference in the energy cost. I was pretty interested as a manufacturer of insulated clothing years ago, but finally after testing, we realized that that particular product was basically worthless. @$3.50 / square ft, that is pretty darn expensive. If we took a home of 2000 square feet, are they suggesting that this would have a payback ever with the cost being $7000.00+? I DO like your analysis of other products, but, as I said, I'm not convinced..
curious how this might work in a Trombe Wall.
an outdoor solar collection box could be supplemented for an experiment. ideally, a design mixture of the two could heat a home overnight... with dampers helping to trap the heat gain during the day, preventing circulation & overheating a room. could route it through an ERV/HRV unit too.
Compressed earth block behaves as a phase change material based on how it absorbs or releases water vapor based on temperature and humidity. Works especially well in climates with sufficient diurnal temperature and humidity swings like the drier western US. Have you done a overview of compressed earth block technology yet? If not, I’d highly recommend it.
Interesting product, Is there an Environmental Performance Declaration (EPD) it? Just wondering if the aluminium is required? As another commenter suggested a comparison between this product and other high thermal mass products (bricks, unfired bricks/Adobe, concrete, aerated concrete) would be welcomed. Specifically considering; thermal conductivity, emissivity, water vapour diffusion resistance factor, density and specific heat capacity.
Lastly I assume this could make a great vapour stop if the joints were taped.
"Stores heat during the day, releases heat at night" - this probably makes sense for a tin container in the middle of a desert... But a reasonably designed house already has its energy storage - the foundation slab, coupled to the energy of Mother Earth - so the day-to-night temperature variations are imperceptible. Capturing the summer energy for heating in the winter is a whole different story... The Norwegians somehow managed to to it, but the upfront costs were astronomical.
There is another issue as well. Temperatures here routinely drop below 0 degrees Celsius during winter and our days are short. Not to mention getting energy from say sunlight is a tad bit difficult if you get continuous snowfall as it will cover whatever you insulated with the phase change material further insulating it and reducing the temperature differences between night and day.
@@aBoogivogi "our winter days are short"... you have real days in the winter? Lucky! Greetings from central Russia, where there's exactly one (long-term average) sunny day in January. And, if I remember correctly, even a 15-minute glimpse of the sun counts as a "sunny day".
I would like to know more about their application in the transportation of food and medicines, please 🙏.
Would you want to use this instead of or in conjunction with radiant barrier? Also, I'd love to see you do videos on aerogel and cork insulation.
Both are possible, depending on the condition of the space. Have to consider the law of finishing return. If it’s not a good fit and or overkill, we let the home / business owner know.
Would there be any advantage to have multiple layers of which each layer would be at a different temperature of phase change? Maybe with an insulation layer between them.
I need to cool a small box containing air (8 by 8 by 7 cm dimensions). If I suspend a PCM inside the box, will there be any appreciable change in the air temperature inside the box, at the operating temperature of PCM ?
I’m curious if this would be useful as augmented insulation between wall studs on exterior walls? If so, how would this be secured? It’s seems that this stuff lays flat or is draped on a roof. Would this work in like basement exterior walls being finished if they could be secured in a vertical position?
Hi Riz👋. All QE P mats feature a heat sealed stapling edge, just for the kind of application you’re considering. Additionally we have the ability to reconfigure the dimensions of the mat for special orders.
More cool stuff. This kind of thermal advantage is much more efficient than solar electrical generation.
How to use in the Car cabin for cooling? Where can I get the PCM packet?
Hi, really informative video. I am interested to know more about couple of PCMs especially for +4c, +18c, +22c and -21c. What are the elements I should use to make and approximate mixture in %age? Can you please help me or you can connect me to the relevant experts? Thank you and regards
Why is aerogel or vacuum panels insulation not used in buildings? Please do a video on pros and cons.
If you could use electrolysis on the boundary layer of a solid significantly changing its phase change temperature to liquid that may be useful for cooling. Going the other way would release heat. Just a thought.
I am thinking in Melbourne these would generally be good, except we get heat waves that don't break for a few days where it stays over 30C for a few nights, is it a problem that they would be sucking up A/C by solidifying?
What are the temperature ranges for these products? Would we want to have two, one for each temperature range or are the ranges huge or maybe don't overlap enough?
i need to purches this where can i found this organic phase change material
Looks like oatmeal! Hope you're staying warm!
i was going to say, this stuff seems great, except when night time temperatures and nopt much different then daytime. i mean, if it is absorbing 120 degrees F during the day, and night time is still in the 100's, this stuff as no use. the houses temp will be a minimum of 100 at night and will get to 120 faster during the day. still need a heat pump. but now the heat pump will be working against the PCM insulation having to cool it down before the house will cool down. neat idea, and i am sure it has many applications, but for a home, it is only a supplement.
Thanks again ! I am working on the renovation of my housing coop 32 years old building and your video really help us to navigate the strange world of construction. Speaking of which, we have a really hard time to make our mind about windows ! I live up north in Canada and it is disturbing to see the low quality windows that are installed in general. We would love to have your insights on what makes a good windows. Just seeding ideas here :) Or what about certification ? s the German norm passivhaus way better than Energy Star for instance ?
I'm just beginning to dig deeper into building science myself, so I'm no expert. But, Passive House (PassivHaus) seems to focus on the building envelope as a whole while energy star is rating individual components. The biggest mistake I see is focusing too much on R-value and not air tightness etc. In my area, many windows are vinyl which can perform well, but if they're not tight to begin with (casement style is significantly better than sliding), they definitely won't be tight in 10 years. Plus the service life for vinyl is only about 20-25 years best case.
@@arlinstoltzfus5026 Thanks, very helpful. Most of the windows available here are vinyl (PVC) too and we are not happy at all with them. An architect just gave me a crash course about what make good windows and I think we will explore the Passivhaus options as it appears than the Energy Star label doesn't guarantee that the windows can cope with our winters.
Is it susceptible to mold, if it gets punctured,or sliced?
How do these compare with aero gels?
Any issues with the gaps between the pockets?
Phase changing material has a set temperature it changes phases, but what if you want to change temperature? Go up or down on thermostat. Could then just insulation be better and if you want too cool house let air out
where can this be purchased .
At what temperature does the phase change?
I sat waiting, when will Ms Carr get out the flame thrower!? Then was disappointed you only used a lighter this time. But still another great video.
Lol! I have a propane torch, but it didn't work well/look good on camera since it was a very windy day. But a flame thrower is on my list.
@@BelindaCarr that could make a good TH-cam Short actually, I wouldn't mind seeing this under your torch, (or everything else you review under a flame thrower 😂) with it being essentially half cooking oil i imagine with enough heat it would ignite and stay on fire? How did it fair under the torch?
these would be very useful in passive solar buildings.
Has anyone actually reviewed the material to see if the 100 BTU/sqft is accurate? It looks like you deconstructed the material in your video but did you actually test it?
mmmm yes! The forbidden oatmeal packets...
wow
Interesting video. I question your comment about making it easier to walk around in the overhead space. There is nothing about the product that would support someone's weight and it will further block visual line-of-sight to ceiling joists. I too wonder about rodents being attracted to the product.
Instead of needing several feet of insulation which covers the ceiling joists, these PCMs could be much thinner. This would allow you to see where to walk.
@@craigheimericks4594 I understand what you mean but in the context of her remarks and the supporting video she was talking about laying the product on top of existing insulation.
The key word here is efficiency. Is it efficient enough to absorb energy to actually make a difference. An incondencent lightbulb is good as a demonstration, but not good as an example of in reality since most of the world won't have 70 degrees C to work with. The colder you go, the higher standard you need of efficiency in order to make a difference.
P.S I forgot this: You used concrete as an example of insolation. Concrete is a terrible insolator it conducts heat very well there by making useless preventer of heat movement.
you mention its application in roofing. Can it be used on walls?
Yes, it can be used on roof, walls, and also floor.
I'm really confused about this phase change material.
How does it work if its not exposed to the sun?
What's stopping the organics from putrifying?
Lack of access to oxygen.
I’d be curious about the life of the product depending on materials, though.
Any idea what happens in freezing temperatures to these materials?
Nothing, they are just in the solid state and can no longer absorb energy
Phase change insulation material will not work on top of attic insulation. The material has to be placed first before the blow in attic insulation. The whole idea of phase change insulation is not to provide r value but to provide energy storage. Why would you want to store the attic energy only to release it into the attic when the attic cools? The outer material being recyclable (aluminum im assuming) doesn't mean there is a facility that would take it.
Contaminated fiberglass and rockwool isn't recycled, nor are most building products. PCMs can last over 100 years! Longer than the avg lifespan of a building. It can also be picked up and moved to a different building.
As for releasing it at night, it's smarter than letting attics get hot and allow the heat to move into the building through conduction, convection & radiation during the day... like traditional insulation does.
I hope the product evolves to something that uses the energy stored, into of releasing it.
@@BelindaCarr 100 btu per sqft won't play a significant part and won't be cost effective in keeping heat from transferring to the house. Thick blow in and passive attic ventilation. I do see it's benefits being used indoor or under attic insulation, but it's a large waste of money putting it on top of the blow in.
My thought too. Over here in ole Europe we use the drywall variant eg Knauf Comfortboard. It works but it's costly.
@@astranger448 I remember first hearing about the drywall containing a wax to absorb and release heat maybe 10 years or more ago. I'm in Canada and in spring and fall I find the mornings can be cool requiring heat and some evenings hot requiring cooling so a large heat sync in the interior of the house would definitely save money.
My question is how easy is to puncture, or shred opon contacting sharp objects.
Not very easy. I had to slice through the thick foil several times to cut through.
@@BelindaCarr i can imagine a rats learning to chew through those packs if they ever learn that there is food inside..... And they will learn if this material is ever used in any bigger amount.
Wow, I am planning on building a rustic log cabin from scratch, and it sounds like my insulation needs will definitely be covered. With faith that the price will be more competitive, closed cell rockwool is now my second choice. Thank you Ms. Carr! I'm going to subscribe! May God bless you continually with your good works.