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Make no mistake, this IS a commercial, but an extremely well-done commercial packed with both generic and specific HVAC technical information. Well done.
I was hired as a maintenance mechanic at a hospital, because if my general hardiness and mechanical aptitude. I found I know next to nothing about HVAC, which puts me at a disadvantage. Your videos are such a blessing to me. I intend to become an OE2, and have much to learn first. You are filling much of that need. I will, shortly, be sending along some financial help. Great job!
I’m not gonna lie I was a little scared of getting into HVAC but with this video helping me understand it a lot better I feel a little more confident working on the machinery
The magnetic bearings and the 2 stage compressor had my attention first, but then the shutdown system that turns the motor into a short term generator is a fantasic way to protect the whole machine. Thank you for this video!
Well done on the explanation, As a technician, anyone I speak with that has worked on these compressors we're torn in their option. I unfortunately never had the opportunity to work on them being a York Factory Technician. Magnetic bearing compressors are the future.
I pretty well got out of the trade about 26 yrs ago and only occasionally work on residential AC or RV AC. I was working on Trane RTAA Aircooled water chillers and they were top of the line at the time. This is badass! I had no idea things had advanced so much.
The new York chillers have a 12V DV battery that keeps the shaft of the magnetic bearing levitating and it will slowly spin the rpms on the shaft down when you have a power loss instead of the shaft just free spinning and falling very cool design. They also have a "marine" option you can buy and it includes hinges on the shells so you can clean the tubes out instead of having to use a chain fall to take the end caps off the tubes, but watch out it you order the marine version the blueprints don't include the total overall width of the chiller with the hinges they only include the width to the end of the frame the hinges add another 6 inches of width on the entire chiller (we had to cut and re wield the hinges back on )
Wonderfully comprehensive video! My only criticism is that liquids can in fact actually be compressed, but only at such staggering thresholds of pressure that for all practical intents & purposes they can be considered to be "incompressible".
Turbocor was purchased by Danfoss it’s not the other way around. Every chiller breaks down and Turbocor don’t break down they Scramble, every turbocor I’ve had was removed and converted to screw, digital scroll or centrifugal if applicable. My current facility has 15 chillers, I’d never spec a Turbocor.
@@BobWidlefish the engineers called it crashing initially. During a power outage or other anomaly the core shuts down too quickly. It’s important for a turbocor to shut down and rest easily on the support pads. I don’t remember the exact number, but the pads are good for a limited number of emergency shut down cycles and the capacitors have to be maintained having this in mind.
We just had a new Smardt chiller installed in our building, and I wasn't sure what type it was. After watching this video, it appears to be a 3 stage turbocore chiller. The only difference is that the evaporator is in the mechanical room and the condenser is air cooled on the roof.
I have 3 chillers, with 2 of these compressors each, at one of the campuses I oversee. Now when I give tours to refrigeration mechanic students and explain how these work, I will talk a little less out of my behind, lol. Great video on the turbocors. Thank you
When the turbocor compressor was designed the engineers had hopes to eventually scale it down to be able to enter into the domestic refrigeration market. I rather doubt that will be pursued unless another design team
Well like any invention it will be varied for other purposes, with the energy and carbon reductions and need for efficiency it's probably likely that a variation of this could reach domestic units. The bearings in particular and the soft starter could be
handled chillers with multiple turbocor compressor, york ymc2 magnetic bearing and york yz magnetic bearing. the difference with turbocor with yz and ymc2 is turbocor needs multiple compressor in parallel to match a york single compressor tonnage. this restrictions in danfoss turbocor compressor design mainly the fact that danfoss has only one patents on magnetic bearing technology while york has skf magnetic bearing technology patents and synchrony magnetic bearing technology patents. recently johnson controls, which is the parent company of york has acquired siemens synchrony magnetic bearing technology which secured the large tonnage compressor to york chillers.
The design has been around for many decades. The problem was the size and speed of electronics. Early units had a control panel bigger than the chiller vs current units where the controls are barely bigger than a shoebox.
You should make a video about harmoics, that subject is quite confusing and I really don't understand how they form. It'll make for a good informative video.
A full electrical transformer video with calaculations and an example like arch welder to illustrate would be awsome. Please consider as a next video Project . Hug fan of the channel BTW. thanks for all the information and knowldge you share and explain.
Could you make a video on how EKG machines work? There are only videos from a medical point of view, ir would be great one that explains the engineering behind the 12 leads, electrodes, etc. Your videos are great!
thanks. I really like your videos. Can you make video about industrial air compressor, and industrial refrigeration machine, using NH3? and how to check them regularly?
Do you have a simple block diagram consisting of major components of electrical from AC input down to motor winding? I just want to see how the power transforms until motor uses it.
As a bachelor student of Electrical and Electronic engineering, I find efficiency oriented engineering as a prime priority over gimmicks. In efficiency, reliability is key, I hope to find what differentiates the "Turbocor Chiller" from a traditional heat exchanger. But most of all, the 'Co' coefficient of heat exchange to energy input compared to similar systems. One downfall I would not find acceptable with this kind of system is the lack of a reverse flow valve. I can see that water would not be a suitable means for evaporating with colder climates though haha.
Pardon me, "Co" = 'COP' rating. Also, I understand they can be more efficient (easily) than geothermal exchange, but I'd like to see them employed in residential dwellings.
Could you make a Video on how to build/design an AC unit? I'm really enjoying your work, and it inspires me for some Ideas, but I struggle to start a project.
Great video, thanks a lot for putting in the effort to make this. I only haver one question, why is there a need to have a soft start and a inverter? Isn´t the inverter with some kind of signal from the chiller controller enough?
I want to ask..If at suction compressor icing, this refrigerant is still liquid? If still liquid, problem source is expansion Valve or evaporator? Thank you🙏
Icing of the suction can be a problem with refrigerant level or air flow. Very rarely is it a expansion device. What you need to do is clean both evap and condenser and change any filters only then can you analyze the system. What you want is to have a superheat that ensures no liquid refrigerant is flowing to the compressor. If you can get the temp of the suction line exiting the evap outside the unit and subtract that from the Tsat found from a refrigerant pt chart. On residential units you want a 10deg superheat around there every manufacturer has their spec. This also depends on load if it is a txv. Its a fixed super heat if it is a cap tube. Also you want to check subcooling on the condenser which will tell you your refrigerant level if you have no subcooling your low on charge and that is causing your suction pressure to drop below freezing and icing the coil
Ryan's provided I great answer. I will just add that Danfoss have a free app called "troubleshooter" which diagnoses all refrigeration system problems. Very useful.
In terms of safety to individuals and surrounding equipment, there are no concerns as the EM field dissipates exponentially as you move away from the internal components.
Is it because it is oil-free it is more efficient than a screw compressor-type chiller? Because I can't find another reason why a centrifugal chiller can be more efficient than a screw type.
The magnetic bearings vastly reduce the mechanical losses compared to traditional compressor bearings, it's also combined with VFD, EEV, IGV and precise controls
Normally centrifugal compressors are more efficient by the way, centrifugal compressors are non positive displacement unlike screw compressors , so they give reletively higher flow, meaning more refrigerant is passed to the evaporator therefore higher cooling capacity. On the other hand the centrifugal compressors can maintain reletively lower pressures so they normally used with water cooled chillers rather than air cooled chillers ( flow determines the cooling capacity but maintaing pressure ensures the heat rejection) . Of course the fact that we are here talking about oil free compressor its another reason its more efficient
Being oil free does help it be more efficient, but it also removes the problem of oil moving with the refrigerant which is a problem with chillers of this design.
Why do we use a open system for cooling the water back down? Why dont we use closed condensators instead of cooling towers as we would with a freon system?
Because the water evaporates and carries the heat away for free so we get extra cooling. Passing it through a closed heat exchanger isn't as effective.
What happens upon failure of the inverter? I know the induced voltage on failure allows the magnetic bearings to still work on power failure, but on inverter failure won’t it cause damage?
In the United States you need a license to handle refrigerants. Where I work, one of these chillers failed and the refrigerant was removed with a vacuum pump prior to the compressor removal.
@@hide6625 I did not talk to the personnel when they came to my company but it is very likely that you need the parts supplied by the manufacturer of the turbocor and most will require that you are trained to repair their equipment.
Hi, Veritasium maked video about car that use wind and go faster that a wind and steve mould maked video about bouts doing allmost the same and i was wondering can you make video that explains whats inside windmill turbine. Thx😁
Yes, because then it is clean and you can control the voltage and frequency exactly to what's needed. Otherwise you just get what's supplied from the mains
@@brarautorepairs the only DC motor that wouldn't require an inverter is the older brushed motors. If you use brushes, you're giving back all the efficiency gained by magnetic bearings and variable speed.
@@bandiras2 your car probably isn't worth 1/8 the cost of this chiller. Therefore, I'll stick with not trying to compress liquids. Pay attention, you might learn something.
Sir why don't this content also reach through Telugu language sir.. I can help you in that regard sir my mother tongue is Telugu.. I am also a 3 Rd year electronic and communication engineering student
We need the cooling water to be lower than the room temperature, the larger the difference the more heat transfers. If we didn't use refrigeration system we would be pumping something around 30°C/24°C water around, that's not going to be of much use.
That will only work if you need to cool the building and the outdoor temperature is lower than the desired indoor temperature. The whole point of the refrigeration loop is to move heat from a lower temperature area to a higher temperature area.
Refrigerant are very costly if we circulate it whole building we will need a large quantity of refrigerant also there will be chance of leakage.we cannot afford.thats why we use water to cool down and circulate in building. Hope i get your point.
@@EngineeringMindset gas turbines on natural gas pipelines is another application for booster pumps. The mag bearings have a faster Spin up. Thanks for the info. I wonder if the IGBT failure causes a rub loss of phase of the motor also.
Since the motor and impeller sections are integral to one another, the entire inside of the compressor is full of vapor refrigerant. This refrigerant is used to keep the motor, shaft and bearings cool.
It’s not necessary, but it is energy efficient to be able to match the required load demand opposed to cycling the equipment off and back on. It adds life to the equipment by a continuous demand cycle. Another benefit is lowered amps at startup compared to the locked rotor current demands of conventional compressors.
The Turbocor is a great compressor plus when you remove the oil in a chiller you gain about 10% in efficiency due to better heat transfer. The biggest issue I have seen with this compressor is when you come out of free cooling to mechanical cooling with inverted water temps the compressor can shutdown on over temp because that 3/8 liquid line isn’t providing enough liquid refrigerant to cool the electronics don’t know why they don’t use a liquid pump to help solve this issue. Besides that great product.
