Look at the heat loss through the walls and roof as a function of temperature difference.
Heat in equals heat out.
When you have solved that, consider heat loss in the air curtains and add that in.
Air curtain loss may be negligible or it may be considerable depending on how often the doors are...
No effect.
How much will 40 km of 3 conductor, 2500 sq. mm. cost?
Start considering multiple smaller cables in parallel as dpc has suggested in your other thread and cut your cable cost in half.
Probably not.
On the other hand, given as both PF and eff vary with variations in loading, any use of those values at less than 100% load is probably inacurate;
Some of my calculations may be more illustrative than definitive.
When I recognize that my results are in error, I am hesitant to...
Consider power factor correction of a motor.
This is a correction capacitor in parallel with induction, (The motor)
You are proposing an induction in parallel with a capacitor.(The cable)
The electrons will not know the difference.
Compared to the motor circuit:
Supply to connection point...
380V x 1.73 x .0.87 x 0.959 x 320A / 1000 = 148 kW Actual Mechanical Power Out
380V x 1.73 x .0.87 x 0.959 x 336.9A / 1000 = 185 kW Maximum Rated Mechanical Power Out
380V x 1.73 x .0.87 x 336.9A / 1000 = 193 kW Maximum Electrical Power In.
Skin effect comes to mind.
Some of the things affecting ampacity;
The temperature limit of the insulation and or surroundings.
The ability to radiate the heat losses so as to limit the temperature rise.
Consider;
The three conductor cable has less effective surface area per conductor to radiate...
Torque, not HP.
WRIMs are often used in applications demanding a lot of torque.
I suggest evaluating a contemplated replacement motor based first on the torque demanded by the load and second by the HP.
You may need a higher HP to develop the torque needed. Maybe not.
For example; If the peak...
Thank you for sharing, Muthu.
That is the way to go for a variable input speed such as wind power.
I was aware of the technique but had no idea that the generators had grown so large.
But, in the OP's case, with water power, where it is relatively easy to control the speed of the turbine, I...
The transmission line feeding the city of La Ceiba in Honduras had reached full capacity and the city was still growing.
The capacity was governed by the ability of the OLTCs to compensate for transmission line voltage drop.
An old diesel plant, that was the first electric power supply to the...
I goggled Oswald Elektromotoren GmbH and found some interesting information.
Their website features a 300 kW, generator that appears to be permanent magnet excited.
It is rated for operation between 1000 RPM and 2200 RPM.
The frequency ranges from 250 Hz at 100 RPM to 550 Hz at 2200 RPM...
333 kW is seems really large for a permanent magnet excited generator.
The permanent magnet generators that I have seen have been much smaller.
I see them at around 0.6 kW to 1.0kW.
That is about 0.2% to 0.3% of 333 kW.
They have been used for battery charging, or the output has been rectified...
You may have misunderstood the term Permanent Magnet Generator.
Before the advent of PMGs diesel generators supplied power to the Automatic Voltage Regulator from the main generator output.
Some AVRs had sense terminals to sample the output voltage and power terminals where power was supplied to...
Have you checked the Cargill website?
And here:
While I have no experience with FR3, a key difference that I noted while browsing the Cargill guides was that FR3 does not like exposure to air.
FR3 must be handled in such a way as to avoid contact with air, and hot air drying of FR3 filled...
Back to the original question:
It depends.
If the sling has broken under its own weight, increasing the diameter will increase the weight in the same ratio as the strength is increased and the sling will stillbreak under its own weight..
If the sling has broken due to the added weight of the...
We need some more pictures. What actuates the control arm?
Centrifugal? Some other method?
It is a mechanical chopper circuit and the farther the control is turned, the greater the speed needed to interrupt or "chop" the feed to the motor.
It may be well to replace the capacitor before...
I once heard an engineer give testimony in a hearing as too how a piece of switchgear FELL UP into hot terminals.
Most of us mere mortals are bound by the law of gravity, which will almost exactly remove all of the kineticl energy that was developed by the fall to the core of the earth.
Have you...
I guess if you find an unnamed magical material to shore the shaft at the earth's core it may work.
You have to overlook that the energy gained during the dive to the center will be used climbing back out of the gravity well to the earth's surface.
However if you start releasing water out the...
