The Ultimate Heat Pump that Could Change Energy Game
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- čas přidán 15. 09. 2023
- Heat pumps are versatile and energy-efficient devices used for both heating and cooling purposes in various applications. But until now, they have mostly been restricted to residential applications. Their low temperatures have limited their application for industrial heating.
But now, a company named Airthium is trying to disrupt the industrial heating space with a very high-temperature heat pump that can deliver heat at up to 550 degrees Celsius even with a -70 degrees Celsius on the source side.
Renewable energy-based heat batteries like brick or sand battery have been using the resistive heating technique to heat the material and store the heat as thermal energy. However, since the heat pumps can deliver more heat for the same electrical energy input, such high-temperature heat pump technology can replace resistive heating-based thermal storage solutions.
Ongoing research and development continue to improve heat pump technology, making it even more efficient and adaptable to various environments and applications. This very high-temperature heat pump technology could prove to be a milestone in achieving it.
Following is the link to the company's website:
www.airthium.com
& their crowdfunding page:
wefunder.com/airthium
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I have to say it is surprising to hear someone with an Indian accent explain heat pumps using the INSIDE of the house as the sink (ie used as home heating). Usually those of us from warmer climes (I'm Australian) think of them more as air conditioners (ie inside the house is the source). But this is a fine video deserving many more views.
@kenoliver8913, yes, people from warmer climates are more familiar with air conditioners. This technology drew my attention due to the extremely high temperature that it can deliver with very low outside temperatures.
This is fascinating. I hope that it comes to fruition. There must be many industrial processes that need efficient and cheap heat at 500 degrees.
There have existed a industrial equipment called a turboeinduser since at least the 80s that have done pretty much the same thing. Typically they use some other source of heat than ambient temperature, like waste heat, often waste heat from the exact same process, and just feed it back via the turboinduser.
What it basically is is something like a normal turbo charger, where the air is compressed the heat is removed and the air is then decompressed on the same shaft. This method is fairly efficient and can reach temperature of quite a few hundred degrees. Still its like 50-60% carnot efficent, so not perfectly so
Could this be used to design heat pumps that can work with a pretty good C.O.P. even in extremely cold temperatures occurring at the (geographical) poles? Able to keep building temperatures inside around 20°C with radiators optimized for warm heating without ventilators?
Now... I fthis tech could be made financially viable in our -40° Canadian winters, They might have a win in the residential market - especially if it can outperform natural gas on price!
Agree
Interesting 👍
I wish my heat pump cooled down to below 78 when it is 115 degrees out
Well then multistage them (cascade the heatpumps), you can reach much higher temperature differentials still, all with high COP! Also what is stopping the energy stored in the compressed side from driving the compressor as it expands? Nothing, but currently that is just wasted! Also if you don't just look at the heat or the cold but look at the maximum temp difference from the hot to cold side this leads to very high grade heat with a high degree of conversion efficiency, potentially exceeding the point where the second law of thermodynamics can hold!
That is not correct, here is a link to the world's largest heat pump right now for CO2. It can give 85-90 degrees C.
czcams.com/video/-bIlAkTDw8Q/video.html
You can not achieve a COP of 3 while increasing the temperature from -70 °C to 500 °C, the amount of heat possible to pump against that temperature difference is in practice negligible compared to the amount of power required, "in theory", with a system without any losses, it would be possible to pump about 30% as much heat as the amount of power used.
It's not difficult at all to achieve high temperatures with heat pumps, the main problem is that it's impossible to achieve high COP when you need to create a high temperature difference.
Your explanation of the principle seemed strange, you can't pump heat with isothermal compression, without a change in temperature, the change in temperature is the very goal of the heat pump, you can't improve the efficiency of the process by making it useless. You can improve efficiency of compression by dissipating heat of compression very well, but when you want the heat, you don't want to dissipate it.
Agree, It seems the best heat pump over such a high delta T could achieve a COP of only 1.32. COP (heating mode) = T_hot / (T_hot - T_cold) in Kelvin.
Carnot theorem guarantees that this will be barely better than using resistive heating.