In my opinion, The start of the video (00:00-10:00) is explained more specifically instead of generally(when compared to your other videos). You should of started general and then explained it specifically. It saves the audience time and work, from extrapolating the gist from the specific explanation. It makes it harder to understand. Lessen the work by breaking it down into general terms first then go into more specific terms. For example: This is a type energy transfer From heat and pressure to kinetic spin energy. Instead of using water that is heated into steam that spins a turbine. The differences are this is a majority closed cycle, (recycling heat into the next cycle) PS, In my opinion, I noticed using the engineering terms(bar, Recuperator) isn't helpful (because your job is to explain to the masses). It shouldn't be named that on the screen since your screen is so small. If I had more room I could put the engineering term next to the descriptive term. For Example: cool sCO2 > Compressor +pressure (100bar) > Heat exchanger(recurpurator) +temp> Source +temp > Turbine -pressure > Heat exchanger -temp> Coolling -temp> Cool sCO2 9:20 did a okay job of explaining. Move that to the beginning. My questions are: How does the secondary reycling heat exchanger dump its LOW heat onto the Primary HIGH heat exchanger? Heat does not travel from low to high. "SOURCE + temp" wasn't so clear on what Source was. Great video.
Source is " fire " whatever U are using Gas burnner or coal fired or Concentrated solar power . Heat exchanger(recurpurator) is dumping unused heat of returening sCO2 {350+ °C} to incoming sCO2 stream which is {200+ °C}. So delta is 150 °C unused heat will act as a preheater . I may have mixed up words in my video
6:50 I think step 1 must start at point 3 when you add heat to the sistem. after with that generate electricity in turbine and after sCO2 done the work go to next step wich is 6 in the recuperator of remain heat and after that get out all the heat and compresor compres it again. Start with compresor is more hard to figure it how is working.
Where does the pressure energy to drive the turbine comes from? The pressure is added by the compressor using energy. And does heating do anything to the to that? And how does it have a net energy gain if we use energy to compress and you the compressed thing to do work?
Lots of useful information, thanks for the video!! Magnetic bearings are common place in nuclear since decades ago, they are used in the helium circulators of gas cooled reactors, so I dont think thats a too exotic thing. More worrying is the spinning rpms and the whole coupling stuff, I was not aware of that. Which is the state of the art at the moment? I know thay DOE is already operatimg a pilot 10MW sCO2 plant. Are there plans to scale up that? Is industry (utilities) stepping in in some degree?
As far as I understood the 10MW plant is already an accomplished milestone. Are there plans for larger plants or interest from utilitues or industrial waste heat recovery to implement this tech?
@@s2tenglish I wonder how this would work connected to a co2 pipeline? They run cold, high pressure co2 through them. Instead of recycling the co2 you could just have a constant flow of new co2 coming in and then recover the heat. You'd just need to cool the co2 and bring it up to pressure to feed it back into the pipeline. Depending what else you've got in the area you could pipeline the hot co2 to a factory for them to use. Maybe they use it for a product or they just take the heat energy. Any co2 left over can be cooled and pressurized again to feed back into the pipeline.
we americans speak slower... you speak a bit fast, but you are understandable... and the rate of which you talk conveys so much passion about this project... and you are still very understandable... love this presentation!
Use two deep (10 to 20 km) bore holes in the earth for heat and pressure. The heat at the bottom will reduce the density of the fluid in the bore hole going up to less than have the density of the fluid going down. No compressor or heat source required at the surface. No pollution.
man drilling to 10-20 km is too far. the current drilling technology has not reached that point yet. But depending on the location, you can get 150 to 200 at a depth of 4 to 5 km (like the geothermal fields in California and Nevada) which is enough to reach that 10% efficiency of course you will need an efficient system and you might use solar panels for more heating (of course the use of solar panel depend on your region solar energy) Please let me know if I am wrong.
very good presentation, but a couple of recommendation for improvement, please talk a bit slower and avoid using the word ''heck'' which is not a polite word to be used in professional settings. just a humble suggestion
00:00 Intro
00:10 Hands On
00:54 LOGIC
10:10 CONS
18:56 PROS
23:29 future
28:04 Thanks for Watching
Thanks man
In my opinion, The start of the video (00:00-10:00) is explained more specifically instead of generally(when compared to your other videos). You should of started general and then explained it specifically. It saves the audience time and work, from extrapolating the gist from the specific explanation. It makes it harder to understand. Lessen the work by breaking it down into general terms first then go into more specific terms.
For example:
This is a type energy transfer From heat and pressure to kinetic spin energy. Instead of using water that is heated into steam that spins a turbine. The differences are this is a majority closed cycle, (recycling heat into the next cycle)
PS, In my opinion, I noticed using the engineering terms(bar, Recuperator) isn't helpful (because your job is to explain to the masses). It shouldn't be named that on the screen since your screen is so small. If I had more room I could put the engineering term next to the descriptive term. For Example: cool sCO2 > Compressor +pressure (100bar) > Heat exchanger(recurpurator) +temp> Source +temp > Turbine -pressure > Heat exchanger -temp> Coolling -temp> Cool sCO2
9:20 did a okay job of explaining. Move that to the beginning.
My questions are: How does the secondary reycling heat exchanger dump its LOW heat onto the Primary HIGH heat exchanger? Heat does not travel from low to high.
"SOURCE + temp" wasn't so clear on what Source was.
Great video.
Source is " fire " whatever U are using Gas burnner or coal fired or Concentrated solar power . Heat exchanger(recurpurator) is dumping unused heat of returening sCO2 {350+ °C} to incoming sCO2 stream which is {200+ °C}. So delta is 150 °C unused heat will act as a preheater . I may have mixed up words in my video
6:50 I think step 1 must start at point 3 when you add heat to the sistem. after with that generate electricity in turbine and after sCO2 done the work go to next step wich is 6 in the recuperator of remain heat and after that get out all the heat and compresor compres it again.
Start with compresor is more hard to figure it how is working.
but that is the thermodynamic starting point that is when state change begins
Congrats! That is a cool trip.
It was! Great
Where does the pressure energy to drive the turbine comes from? The pressure is added by the compressor using energy. And does heating do anything to the to that? And how does it have a net energy gain if we use energy to compress and you the compressed thing to do work?
what happens if you heat something like a fluid in a closed space ? Right PSI or BAR goes UP that is primary Energy input
Heat provided by burning fuel or fission of uranium
Lots of useful information, thanks for the video!!
Magnetic bearings are common place in nuclear since decades ago, they are used in the helium circulators of gas cooled reactors, so I dont think thats a too exotic thing. More worrying is the spinning rpms and the whole coupling stuff, I was not aware of that.
Which is the state of the art at the moment? I know thay DOE is already operatimg a pilot 10MW sCO2 plant. Are there plans to scale up that? Is industry (utilities) stepping in in some degree?
I think I know them indirectly they are using a gear box so they can coupled it to synchronous AC generator
As far as I understood the 10MW plant is already an accomplished milestone. Are there plans for larger plants or interest from utilitues or industrial waste heat recovery to implement this tech?
How about seals? If you mention the seal problem, please tell me where in the video.
i don't have any concrete information on that part Sorry
Why does it need to be cool down completely? Can’t it bypass and compress the “still hot” CO2 and heat it again?
Energy can only flow in a gradient u need both HOT & COLD if you dont cool off the over all temp will rise & over time it will stop & boom
@@s2tenglish I wonder how this would work connected to a co2 pipeline? They run cold, high pressure co2 through them. Instead of recycling the co2 you could just have a constant flow of new co2 coming in and then recover the heat. You'd just need to cool the co2 and bring it up to pressure to feed it back into the pipeline. Depending what else you've got in the area you could pipeline the hot co2 to a factory for them to use. Maybe they use it for a product or they just take the heat energy. Any co2 left over can be cooled and pressurized again to feed back into the pipeline.
Direct drive superconducting generator?
that wont help the frequency so don't see the point
we americans speak slower... you speak a bit fast, but you are understandable... and the rate of which you talk conveys so much passion about this project... and you are still very understandable... love this presentation!
I am glad you enjoyed it
Is it possible to use big turbines for sCO2 system because of low RPM and high moment of inertia benefit?
no cant do as the high dencity of sCO2 is the reason core principal cant be changed
Use two deep (10 to 20 km) bore holes in the earth for heat and pressure. The heat at the bottom will reduce the density of the fluid in the bore hole going up to less than have the density of the fluid going down. No compressor or heat source required at the surface. No pollution.
That is the dream of Quaise Energy lets hope it works
man drilling to 10-20 km is too far. the current drilling technology has not reached that point yet. But depending on the location, you can get 150 to 200 at a depth of 4 to 5 km (like the geothermal fields in California and Nevada) which is enough to reach that 10% efficiency of course you will need an efficient system and you might use solar panels for more heating (of course the use of solar panel depend on your region solar energy)
Please let me know if I am wrong.
Puppy 🤣🤣 you are amazing man, thank you for the awesome videos.
Happy to help
Magnetic bearings would be ideal. I know they are used in some current turbines and compressors.
fair point
So you're running at 40K and need to step down to 1.5K through a gear box. Yes, that sounds like a major pain.
any RPM above 20000 is called Stupid U can deal with it many thing do but its just too annoying
If no phase change how you generate motion?
"pressure" same way jet engine basically its Brayton cycle
Inertia =mass*rpm with stupid high rpm, why would you need high mass?
its not coupled with the grid so useful Inertia is nill
Perfect 👌🏻
Thanks
very good presentation, but a couple of recommendation for improvement, please talk a bit slower and avoid using the word ''heck'' which is not a polite word to be used in professional settings. just a humble suggestion
👍👍