Ideally a regenerative air to air heat exchanger is used. One side has air from the turbine outlet flowing through, and the other side has air from the outlet of the intercooler flowing through.(IE the air is cooled before it expands in the turbine) This method is how air cycle machines can reach temperatures below that of vapor compression cycles, even cascade cycles.
When I installed a turbo on an ATV I did the first start with a zoom oiler (using motor oil I believe). LOL. I didn't run it long before hooking up an actual oil feed. But funny to see someone else do that too. 😄 ANyway i had briefly clicked on this to remind myself to watch later (when you released it) then forgot until just now.
Idea for an off-grid air conditioner: Use a piston air compressor as your "dump load" so your solar panels compress air when your battery pack is fully charged. The stored air will cool, so in effect the turbo's compressor and intercooler stages are already done. When you need cooling, expand the stored air across the turbine and use it directly or to cool a heat exchanger. The shaft power made by the turbine can run a fan or can be used to generate electricity or to turn another compressor feeding a second air bottle for use later. Thoughts?
hey there buddy, that was a great demonstration on using just air for a refrigerant, really enjoyed watching and seeing this done this way. sounded really cool too as im a big fan of turbo sounds, but this was very fascinating and interesting to watch that temp fall so quickly. you never fail to impress me with your builds mate. thanks for sharing buddy, 👍👍👍👍👍THUMBS UP👍👍👍👍👍 Anthony, UK
@MarkRober needs to see this and have you on his team. You do and explain a lot of cool concepts, maybe with a little more funding and maker space you could have the next revolution in HVAC technology.
Hello. Can 3-phase 380v BLDC (dc compressor) used in inverter air conditioners be operated smoothly with VFD? The rotor has a built-in magnet. However, the speed of the motor is controlled by the IGBT module on the internal card. Its internal control board is broken and has no spare parts.
Where does the energy come from that drives the expansion turbine and in effect drives the compressor? High pressure hot air comes in and is compressed further, then is cooled, then drives the expansion turbine, which drives the compressor. Energy is removed then the air is cooled, so how can it compress the incoming air?
I can understand the confusion, however it is totally possible to compress (or expand) a gas without changing the temperature of it. I'm not suggesting that this is the case in this video, however the air will still have plenty of energy left after being cooled. Energy is first added to the air by the main compressor, in the form of heat and pressure. The bootstrap compressor adds further energy, although not nearly as much, only a small fraction of what the main compressor has. Energy is lost in the intercooler but most of it is in the form heat. The pressure losses in the intercooler are mainly from friction, but some pressure is lost because the air has been cooled. There is still enough pressure left to drive the turbine. The Turbine is the last step and it extracts the remaining energy and converts the pressure into usable work. Since energy left the air in the turbine, the temperature therefore is lowered. The work done by the turbine is used to drive the compressor and the cycle is complete. If you want to know more, do a search on "bootstrap air cycle" You will be able to find a more detailed explanation that what I can give
Efficiency of a vapor compression cycle is highly dependent on the condenser and evaporator temperature so it's hard to say exactly, but a rough estimate, I'd guess in good conditions that a decent air conditioner would have a COP of about 4. An air cycle machine at similar temperatures would be doing well to have a COP of 1. So this is about 4 times less efficient, or basically uses about 4 times as much energy
It is a Fuji Electric VFC606A. Static pressure 1000 MM of H2O. Volume 4.4 Cubic Meters per minute. 3 Phase induction motor. 3.4 KW at 60 Hz. 220 Volts 12 Amps. Doesn't specify RPM, but it is a two pole motor. Synchronous speed would be 3600 RPM at 60 Hz, so it's probably around 3500 RPM.
I wonder how feasible it would be to DIY a water cycle air conditioner. Main challenge is the vapor density at air conditioning temperatures is very low, requiring the compressor to operate at very high speeds to get it to a reasonable size.
Induction heaters don't really need special gate drivers as long as the switching frequency is below 20 KHz. You can use a standard one, for example IXDN 630
I have an experiment I want you to do!
Using the suction of a vacuum cleaner to spin up a turbocharger
cool experiment! This deserves way more views.
Is it possible to connect a second intercooler to the output of the turbo (cold air side) into the suction side of the compressor?
Ideally a regenerative air to air heat exchanger is used. One side has air from the turbine outlet flowing through, and the other side has air from the outlet of the intercooler flowing through.(IE the air is cooled before it expands in the turbine) This method is how air cycle machines can reach temperatures below that of vapor compression cycles, even cascade cycles.
When I installed a turbo on an ATV I did the first start with a zoom oiler (using motor oil I believe). LOL. I didn't run it long before hooking up an actual oil feed. But funny to see someone else do that too. 😄
ANyway i had briefly clicked on this to remind myself to watch later (when you released it) then forgot until just now.
Idea for an off-grid air conditioner:
Use a piston air compressor as your "dump load" so your solar panels compress air when your battery pack is fully charged. The stored air will cool, so in effect the turbo's compressor and intercooler stages are already done.
When you need cooling, expand the stored air across the turbine and use it directly or to cool a heat exchanger. The shaft power made by the turbine can run a fan or can be used to generate electricity or to turn another compressor feeding a second air bottle for use later.
Thoughts?
hey there buddy, that was a great demonstration on using just air for a refrigerant, really enjoyed watching and seeing this done this way. sounded really cool too as im a big fan of turbo sounds, but this was very fascinating and interesting to watch that temp fall so quickly. you never fail to impress me with your builds mate.
thanks for sharing buddy,
👍👍👍👍👍THUMBS UP👍👍👍👍👍
Anthony, UK
Hello there nice idea
I have some doubts
@MarkRober needs to see this and have you on his team. You do and explain a lot of cool concepts, maybe with a little more funding and maker space you could have the next revolution in HVAC technology.
Hello from Ukraine, like your channel 👍
Great vid. Cool concept. It is a shame it is not efficient.
maybe if you put a fan over the intercooler it would get even colder.
Ive got an 18 horse becker pump for my vacuum table bet i could make a sick AC with it instead of just exhausting out
Kuddos to you, vrry interesting to see!
Btw...do you have a link to a static 480v 1ph. to 480v 3ph. converter?
Hello. Can 3-phase 380v BLDC (dc compressor) used in inverter air conditioners be operated smoothly with VFD? The rotor has a built-in magnet. However, the speed of the motor is controlled by the IGBT module on the internal card. Its internal control board is broken and has no spare parts.
Good example of a turboexpander. In natural gas processing a turboexpander can bring the gas temperature down past -150 degrees f.
Where does the energy come from that drives the expansion turbine and in effect drives the compressor? High pressure hot air comes in and is compressed further, then is cooled, then drives the expansion turbine, which drives the compressor. Energy is removed then the air is cooled, so how can it compress the incoming air?
I can understand the confusion, however it is totally possible to compress (or expand) a gas without changing the temperature of it. I'm not suggesting that this is the case in this video, however the air will still have plenty of energy left after being cooled. Energy is first added to the air by the main compressor, in the form of heat and pressure. The bootstrap compressor adds further energy, although not nearly as much, only a small fraction of what the main compressor has. Energy is lost in the intercooler but most of it is in the form heat. The pressure losses in the intercooler are mainly from friction, but some pressure is lost because the air has been cooled. There is still enough pressure left to drive the turbine. The Turbine is the last step and it extracts the remaining energy and converts the pressure into usable work. Since energy left the air in the turbine, the temperature therefore is lowered. The work done by the turbine is used to drive the compressor and the cycle is complete. If you want to know more, do a search on "bootstrap air cycle" You will be able to find a more detailed explanation that what I can give
This is fascinating. 😊 Thanks scooby pump!
How efficient is this, say compared to r32 ac system?
Efficiency of a vapor compression cycle is highly dependent on the condenser and evaporator temperature so it's hard to say exactly, but a rough estimate, I'd guess in good conditions that a decent air conditioner would have a COP of about 4. An air cycle machine at similar temperatures would be doing well to have a COP of 1. So this is about 4 times less efficient, or basically uses about 4 times as much energy
Sir, how much hp is your high volumetric compressor?
It is a Fuji Electric VFC606A. Static pressure 1000 MM of H2O. Volume 4.4 Cubic Meters per minute. 3 Phase induction motor. 3.4 KW at 60 Hz. 220 Volts 12 Amps. Doesn't specify RPM, but it is a two pole motor. Synchronous speed would be 3600 RPM at 60 Hz, so it's probably around 3500 RPM.
Air cycle is a great refrigerant. Check out Mirai Intex
What if you just used a electric turbo
Sir your video is good sir how to make a simple inverter with two pic igbt module 5kw input 48volt DC and output is 220volts thankyou
Could you use a tesla turbine for this?
I wonder how feasible it would be to DIY a water cycle air conditioner. Main challenge is the vapor density at air conditioning temperatures is very low, requiring the compressor to operate at very high speeds to get it to a reasonable size.
Neet demonstration, it's sad that compressed air is never efficient.
So that's where all that sound is coming from when waiting in the plane for it to taxi away from the gate...
induction heater igbt 300a1200 gate driver
Induction heaters don't really need special gate drivers as long as the switching frequency is below 20 KHz. You can use a standard one, for example IXDN 630
You decreased temperature from 22° to 12° Celsius
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