New AC Tech Sends Heat Into Space & Saves 95% On Cooling Bills! - YouTube

it's summertime somewhere and all i can  keep thinking is how in the world did  

anyone ever live without air conditioning  seriously but as we all know keeping our  

homes at a comfortable temperature can come  with a hefty price tag both financially  

and environmentally but what if i told you that  one company is working on a cooling system that  

could cool your entire house without producing  any emissions and bring down your electric bills  

by 95 percent better yet it does it by  harnessing the coldness of space sound  

too good to be true well with the company sky  cool and their passive radiative cooling systems  

it just might be possible come chill with us  as we take a deeper dive here on tiba davinci  

special thanks to acorns for sponsoring  this video automatically invest your money  

by rounding up purchases using acorns the world  loves ac and why not getting to set your home  

or office to the perfect temperature so you can  live comfortably all the time who needs fresh air  

but as demand increases things might not be so  cool after all you know what is super cool though  

hit the like button right now about 15 of  the planet has air conditioning but as global  

temperatures increase and developing countries  continue to well develop demand for that sweet  

sweet ac is only going to increase in places like  india and brazil purchases are increasing by over  

15 annually by 2050 the global population will own  over 5.6 billion air conditioning and refrigerator  

units adding about 10 new units every second  for the next 30 years this proliferation  

can be seen as a major win for public health a  2015 heatwave in india killed over 2500 people  

more ac would definitely help people  in such intense weather situations  

but there are some major downsides with air  conditioning systems contributing to the very  

problem they are designed to solve part of the  problem is that the ac heat pump technology  

really hasn't been updated much since it debuted  in the early 1900s we've actually done a whole  

video on heat pumps that you should definitely  check out but we'll do a short breakdown here  

essentially ac systems are heat pumps that  pump a special chemical compound that has a  

convenient boiling point through a mechanical  system that initiates different phase changes  

the tldr version is that as this coolant passes  through an evaporator it goes from liquid to gas  

absorbing huge amounts of energy where you want  cooling then as it condenses back into a liquid  

it releases energy usually in the outside split  system where heat is discarded downside number one  

is that the process requires an incredible amount  of energy with a whole house ac system that can  

easily consume three to five kilowatts for large  parts of the day ac units alone account for about  

one-fifth of the energy used around the world  adding up to somewhere between 10 and 20 percent  

of global electricity consumption and those  numbers will only grow in the coming years  

then there's the issue of the chemical compounds  that ac units are using as their working fluid  

a common one being hydrofluorocarbons according  to a study from the birmingham energy institute  

in the uk these substances and the power  the units consume accounted for at least 11  

of global greenhouse gas emissions in 2018.  invariably in any hvac system there will be  

some level of gas escape as these fluids are  released requiring systems to be topped off on  

some interval the effect these compounds have on  the atmosphere can be several thousand times more  

potent than carbon dioxide alone in 2016 the deal  reported that ac units added close to 700 million  

metric tons of greenhouse gas emissions annually  so what do we do just turn off our acs and sweat  

it out quietly i mean my mother assured me that  that does build character well thanks to some  

new innovative tech we may have a way of staying  cool without these downsides before we get back to  

the show let me tell you about our sponsor acorns  my entire youtube channel is about why the future  

is gonna be awesome and if you want your future  to be awesome few things matter more than saving  

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bonus investment if you use my link and set  up an account terms and conditions apply a big  

thank you to acorns and all of you for supporting  the show sky cool and their co-founder ashworth  

rahman might have stumbled upon a technology  that could cool our buildings more efficiently  

while consuming virtually no electricity and  better yet they actually utilize the cold  

of space the way it works is truly brilliant  it's not a heat pump in fact when installed  

they actually look like solar arrays utilizing  a natural phenomenon called radiative cooling  

if you've ever gone out to your car on a brisk  fall morning and seen a layer of frost on your  

windshield yes even here in san diego i've  seen it a couple of times in the colder months  

this is an example of radiative cooling this  is where the real fun begins with a quick  

detour through the wonderful world of heat  transfer the study of how heat flows all around us

the three main forms of heat transfer  are conduction where heat is transferred  

between particles of matter in direct contact  convection where heat is transferred from a  

surface to a liquid or gas that is in motion  and three radiation where heat is transferred  

through empty space the effective play  with this technology is radiation infrared  

radiation can pass through dry clear air in the  wavelength between eight and three micrometers  

this range is best to need to cut through  the water vapor and co2 in our atmosphere  

and exit into space materials that can absorb  energy and radiate it out at these wavelengths  

exhibit a strong cooling effect materials that  can also reflect 95 percent or more of sunlight  

in the 200 nanometer to 2.5 micrometer range can  exhibit cooling effects even in direct sunlight  

the reason we don't typically notice this cooling  effect during the day is well the sun this is  

why it gets so much colder at night but sky cools  breakthrough technology has found a way to harness  

this natural process during the day one thing that  has helped skycool make their technology viable is  

the nano technology of their thin film panels  the substances that they use are particularly  

good at emitting infrared light sending about  97 of the sun's beams back out into space more  

bounce back than the sky itself this reflective  capacity allows the cooling effect to take place  

the system's film consists of seven microscopic  layers of hafnium oxide an inorganic compound  

that acts as an electric insulator and silicon  dioxide or silica a natural abundant material  

all sitting on top of a thin layer of silver now  for this process to work we need a few key things  

first we need a material that can reflect as  much of the sun's incoming radiation as possible  

check we need a material that radiates outward  efficiently in the 8 to 3 micrometer wavelength  

check and finally we need this material to  be good at absorbing heat check and check sky  

cool panels contain a working fluid but instead  of hydrofluorocarbons they use a water glycol  

mixture like radiator fluid in your car the fluid  circulates through the panels absorbing heat from  

the buildings through radiators and convection  similar to a traditional heat pump the infrared  

reflection cools the panels and the working fluid  up to 15 degrees below the ambient air temperature  

and the best part is they can work 24 hours a day  seven days a week what's really fascinating about  

this technology is that it actually gets rid of  heat instead of just moving it around remember  

that a traditional ac is a heat pump so that  just moves heat from inside your house to outside  

so yeah if your solution to global warming was  to just crank your ac with all your neighbors  

and open all your windows that wouldn't really do  the trick because you're just moving heat from one  

place to another but with these radiative panels  we actually take the heat energy and radiate it  

into space and in the case of this technology  it doesn't have to be either or adding skycool  

panels to traditional ac units can improve  energy efficiency by about 15 to 35 percent  

fully replacing a traditional  system could generate between 80 90  

energy reduction on top of that sky cools panels  cool without evaporating water and only require  

electricity to run a small circulating pump  since radiative cooling panels are similar to  

solar panels that create electricity we'd have  to decide how to line the roofs of tomorrow  

so what should we choose it turns out based on the  efficiency of solar panels a solar array at the  

same location with the same area would normally  create about 14 mega hours per year or about two  

and a half times less energy than what you could  save by using sky cools panels that is remarkable  

of course the best solution would probably be some  combination of the two or maybe one day our solar  

panels could double as both electricity generators  and radiative coolers that's the kind of thinking  

that got me into engineering in the first place  sky cools panels have already proven their worth  

the company ran a long-term experiment at a  grocery outlet store in stockton california  

decking the store's roof out with 32 panels  covering about 62 square meters prior to the  

experiment the store was spending upwards of 40  000 a year just to run its refrigerator system  

after the system was installed the store saw a  reduction of over 100 kilowatt hours per day or 30  

000 for the year and the financial result skycool  panels brought the store nearly six thousand  

dollars in annual savings but this technology  as with all inventions it's not 100 foolproof  

things like cloud cover and high humidity can  reduce the panel's efficiency as water droplets  

can trap some of the infrared light they do best  in places with clear sunny skies year-round like  

california or arizona still one thing is clear as  the world warms up and it's warming up our current  

options for ac aren't going to help having a clean  passive system that uses no harmful chemicals and  

consumes almost no electricity could be a major  win right now at the moment of writing this video  

the us is experiencing yet another record-breaking  summer heat wave places like arizona new mexico  

and especially texas run the risk of overloading  their grids during summer months just because  

of increased usage of air conditioning passive  systems like sky cool do a better job of cooling  

down buildings while also putting far less strain  on the grid and the result is more money in the  

customer's pocket sounds pretty chill to us but  let us know what you think would you install  

sky cool panels on your roof do you know of any  other air conditioning system solutions out there  

let us know in the comments below so that is a  look at the sky cool radiative air conditioning  

replacement panel pretty amazing technology  and this is the sort of stuff that i just love  

hearing about sure it's early there's long ways  to go for the company but this is some pretty  

promising tech and the right applications this  could be pretty game changing so that pretty  

much does it for us but before you leave if you  like the show and you want to support us and  

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time i'm ricky with tuba davinci and just  remember the future is going to be awesome