These are On McQuays website. Training is there as well.
@137 Amps whats the Kw/ton.... Worse than a typical new cent. This is compared to a screw, not a recip or cent... a screw. Tip speed.....Please do not work on this equipment if you dont know the basics. If you close vanes all the way, how do you keep the impeller cool. You cant. There is built in design that limits the flow of gas to certain %.
i saw this in person at class last night and its awsome. the start up current is low(2amps). the run load on this name plate was 137a...i would like that explained to me.
A typical centrifugal compressor may pull hundreds of amps at start up. This calls for a large elec service and is very expensive. The 137 amps that you say is Full Load Amps. As you know no properly sized comfort cooling system runs fully loaded all the time, so it is very common to see this type of system catch the building load and then reduce its tip speed causing amps to drop. I've seen a 360 ton machine pulling 13 amps. This is at a low load condition.
Yes, sounds like some knowledge here. I understand fully loaded and also have some knowledge of unloaders. from what ive learned from my last post is that its operated off its inlet guide vain so they would be closed at start up, hens no load and low amps. inlet opens and amperage goes up due to the load. but what do you mean by tip speed?
Tip speed refers to the RPMs of the impeller. Since this compressor has a built in VFD it can match the load by adjusting RPMs and modulating the inlet guide vanes position.
Has there been any consideration as to whether this design would be useful in the commercial or industrial centrifugal pump markets? The design as it is already looks like it would be compatible with small boiler feedwater systems or the handling of corrosive/explosive liquids in chemical process plants.
The compressor is oiless - no oil related maintenance issues Only one moving part - the shaft which floats in a magnetic field The vfd and solid-state starter are built into the compressor housing - no external maintenance components Incorporates all stand BMS protocols The compressor is quiet less than 75 dB - comparable to nosier screws of 90 + dB Smaller footprint 1/2 the size to comparable screws Less weight 1/5 - only 265lb vs. comparable screws of 1,200 to 1,500lbs
Answer: The price is dependant on multiple factors, but most utilities offer grants and rebates that make this a viable project with reasonable return on investments. The qualifying factors are:
1) Size starts at 60 tons and goes up to 400 ton (multiple configurations)
2) Must be a positive pressure refrigerant (R12 / R22 / R134a)
Answer: The main shaft has internal micro-electronics, that allows the shaft to become the permanent magnet which is levitated when the surrounding magnetic bearings are energized. Once levitated the vfd brings the shaft up to a rotational speed to correspond to the desired capacity.
These are On McQuays website. Training is there as well.
@137 Amps whats the Kw/ton.... Worse than a typical new cent. This is compared to a screw, not a recip or cent... a screw. Tip speed.....Please do not work on this equipment if you dont know the basics. If you close vanes all the way, how do you keep the impeller cool. You cant. There is built in design that limits the flow of gas to certain %.
OTHG6v 2 years ago
Does any body is offering traninnig on this compressor?please let me know
chameleconcito 2 years ago
where is service literature available
jcijohn 3 years ago
i saw this in person at class last night and its awsome. the start up current is low(2amps). the run load on this name plate was 137a...i would like that explained to me.
sumdumacguy 4 years ago
A typical centrifugal compressor may pull hundreds of amps at start up. This calls for a large elec service and is very expensive. The 137 amps that you say is Full Load Amps. As you know no properly sized comfort cooling system runs fully loaded all the time, so it is very common to see this type of system catch the building load and then reduce its tip speed causing amps to drop. I've seen a 360 ton machine pulling 13 amps. This is at a low load condition.
kesmess1 4 years ago
Yes, sounds like some knowledge here. I understand fully loaded and also have some knowledge of unloaders. from what ive learned from my last post is that its operated off its inlet guide vain so they would be closed at start up, hens no load and low amps. inlet opens and amperage goes up due to the load. but what do you mean by tip speed?
sumdumacguy 4 years ago
Tip speed refers to the RPMs of the impeller. Since this compressor has a built in VFD it can match the load by adjusting RPMs and modulating the inlet guide vanes position.
SAB260 4 years ago
Has there been any consideration as to whether this design would be useful in the commercial or industrial centrifugal pump markets? The design as it is already looks like it would be compatible with small boiler feedwater systems or the handling of corrosive/explosive liquids in chemical process plants.
Tempest20000 4 years ago
have these been used for co2 yet ?
bean74 4 years ago
The compressor is oiless - no oil related maintenance issues Only one moving part - the shaft which floats in a magnetic field The vfd and solid-state starter are built into the compressor housing - no external maintenance components Incorporates all stand BMS protocols The compressor is quiet less than 75 dB - comparable to nosier screws of 90 + dB Smaller footprint 1/2 the size to comparable screws Less weight 1/5 - only 265lb vs. comparable screws of 1,200 to 1,500lbs
toby2960 4 years ago
Nice, I wonder if it's service friendly.
dacandyman22 4 years ago
wicked
steve171274 4 years ago
great idea!! how is the purchase price in comparison with normal screw/piston compressors? and what size range is offered?
aukanmeister 4 years ago
Answer: The price is dependant on multiple factors, but most utilities offer grants and rebates that make this a viable project with reasonable return on investments. The qualifying factors are:
1) Size starts at 60 tons and goes up to 400 ton (multiple configurations)
2) Must be a positive pressure refrigerant (R12 / R22 / R134a)
3) Must be 460/480 volt
toby2960 4 years ago
r they permanent or electro magnets ?
bean74 4 years ago
1. Are they permanent or electro magnets
Answer: The main shaft has internal micro-electronics, that allows the shaft to become the permanent magnet which is levitated when the surrounding magnetic bearings are energized. Once levitated the vfd brings the shaft up to a rotational speed to correspond to the desired capacity.
toby2960 4 years ago
Wow... Awesome...
BrodieLewin16 5 years ago