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zakruti.com » Knowledge, science, education » TED-Ed
How does an air conditioner actually work - Anna Rothschild

How does an air conditioner actually work - Anna Rothschild

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Rating: 4.0; Vote: 1
Dig into the science of how heat pumps both heat and cool a home, and find out the benefits and drawbacks of this technology. -- Typically, with any piece of technology, you pump one unit of energy in and you get about one out. That’s just the first law of thermodynamics: energy has to be conserved. But there’s a piece of technology called a heat pump, where for every bit of energy you put in, you get three to five times as much heat out. What wizardry is this Anna Rothschild investigates the science of heat pumps.
Date: 2024-05-29

Comments and reviews: 20


I was fortunate to be born into a pretty well off family. My father uses most of the extra money we have to make our family more green. We got solar panels installed just like a year ago (well we did the paperwork more like 2 years ago but the process is incredibly slow and drowned in paperwork. We also got an electric boiler installed so that we use up as much of the solar power. And also whenever something breaks we buy an electric version of it. We are considering buying a EV and also considered a heatpump. I do realise that on the individual scale this will mean nothing but more and more of our neighbours are getting solar panels, heatpumps and such. And that gives me just glimpse of hope that if everyone who has the money will go green we may at least offset the emissions enough so that the ones who don’t have enough money to make the switch can keep using fossil for a bit longer(Also idk why so little people talk about insulation when it comes to going green. Heating or cooling a poorly insulated building is like pumping water out of a sinking ship instead of patching the holes)
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Terrible script. Efficiency discussions of heat pumps and comparing it to fossil fuels is misleading or confuses people(unless that is the intention. Efficiency of heat pumps are only comparable to electric heaters that are 100% efficient not to fossil fuels. Then again, it should not be used as comparison as heat pumps will just exceed 100% easily.
C. O. P. or coefficient of performance is a better term to use for explainers. Stress also that heat pumps basically absorbs, moves, release heat-no magic that multiplies its heat or energy.
Additionally, heat pumps not only the best solution. Radiant heaters can also be as effective (upfront and operational cost) if you don't have to heat a whole room.

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Read Liquid Air by T O'Connor Sloane and Chemical Engineering May 1985 of Trippler air liquefier cold box towers.
Thermoacoustic patents for nodes where electrical speakers refrigerate.
Magnetocaloric patents for electromagnet coils to refrigerate.
Laser Optical Trap patents to refrigerate.
Ranque's patented vortex tubes where perpendicular jets of air from a cylinder can use air for a working fluid refrigerant,
Industrial Electrochemical Processes by Khun on how to halogenate organics to produce freon since there are photo halogenation towers where optical light can be used.

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Using 90% vs 500% efficiency wasn't the best worded in my opinion.
I think the word choice would mislead folks unfamiliar with the term efficiency to treat the figure as 500% energy efficient when really it should say 500% efficient at transferring heat which further aligns with your clarification near the end of the video. Or honestly just removing the word efficiency and just say heat or hot air transferring.
The efficiency of energy transfer in a closed system is at most 100% and I know you further explained what you meant by 500% efficiency, it still feels weird to start off with it.

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Heat pumps are an excellent technology with an important use. So are ACs. The change needs to come from the top. the corporations who make these products. Not from consumers, who have to wade through a messy industry that contradicts itself every other day. This is exactly why we have Government, and pay taxes. I hate it when organizations put out information that supposed to be green for American consumers. You realize both India and China are vastly larger, and way further behind right Every American could install a heat pump and it would have almost no impact on climate change.
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Thank you for (at least very briefly) mentioning in-ground heat pumps. THESE are the real wave of the future for this. Much more efficient all year round due to the extremely consistent ground temps even a foot or two below the surface. The only real draw back to heat pumps is how poorly they perform in extreme hot or cold - but this is all solved with in ground systems.
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Stop demonizing Greenhouses gasses
Greenhouse gasses are good, from hydrocarbons to methane, they help plants grow and increase their population, eating the carbon from the atmosphere until there isn't enough, balancing the amount of carbon in the air
This all helps food and resources to grow
Stop demonizing Greenhouses gasses

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Without subsidies, installing heat pumps is cost prohibitive. Even with subsidies, well off people are the mostly the main beneficiaries. Installing a heat pump is only a small part of the equation. The transition won't happen without a middle ground. Otherwise, people will be priced out. Same goes for EVs, solar and battery storage.
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In Norway people are switching to heat system which uses heat from underground and also use the same system for cooling in summer. All of this is powered by renewable electricity. This switch picked up pace when energy prices went too high during last few years.
Most important is using good insulation for the houses.

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No that is categorically not the first law of thermodynamics. Just because energy is conserved (which it isn't perfectly in atomic fission and fusion reactions) does not mean that it isn't lost. One unit into a toaster does not result in an equal amount of energy to the toast or pop tart.
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heat pumps reduce emissions in two ways: first, they run on electricity. ok but globally, most electricity is still generated from fossil fuels, mainly coal and gas
also you really glossed over basically the most important part -- the relationship between pressure and temp and why

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I wonder if using heat pumps for places that produce a lot of heat can be beneficial in killing two birds with one stone. For example, data sensors and manufacturing areas that produce a lot of heat and the heat pump can use it for homes and buildings that need heat in the winter.
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Hello there,
my name is Jacob Rothschild. My family is worth 500 trillion dollars. We own nearly every central bank in the world. We financed both sides of every war since Napoleon. We own your news the media, your oil, and your government. You have probably never heard of me.

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What is unusual is how x-rays on hafnium produce useful energy to have parallels to a story by Asimov or Trinity episode of Star Gate Atlantis so Clarke in Nature theorized loading of isotopic fuels into a crystal lattice matrix of metals could be similar.
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! I recently sold some of my long-term position and currently sitting on about 250k, do you think Nvidia is a good buy right now or I have I missed out on a crucial buy period, any good stock recommendation on great performing stocks will be appreciated.
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Nothing on 'how' it breaks the laws of physics and everything on climate benefits. Didn't need a lesson on science thanks. Same message I've heard 1000x before which is why I bought a heat pump. What I came for is physics lesson. Left blue balled.
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90% efficiency vs 500% What. what even is being compared. What exactly is efficiency supposed to mean here. I would've assumed it meant the efficiency of the conversion from energy to heat, but that obviously can't be right. So what is it
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Of course, the 500% efficiency is reached by cheating xD. You use the energy from outside. That's a clever system, and hopefully we could use it more in our lives. Imagine having hot pipes going to cold areas and viceversa.
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As soon as one comes back from west of a continental divide hot humid air feels like a brick wall to consider how much heat is trapped by humid air able to hinder pressure versus volume efficiencies of fuels to heat to work.
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I am currently considering installing a heat pump over an AC but I have an economic problem. It seems at the time of this comment, running a heat pump on electricity is more expensive then using a gas furnace in the winter.
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