Again thanks to all for the comments.
One final post regarding some of the answers.
There seem to be some confusion as to the original question. Some seem to not understand whether I want to measure "Power" or "Energy". Others indicated that although I want to measure "Power" (as in [kW]) I...
Thanks to all for the contributions and comments. Much appreciated.
cranky108: I think you are right.
The "recording" type meter is the way to go, there are some that in fact go longer than just the full cycle of the pump.
The problem with the Pump Jack is the high variability of the % Load on...
We need to measure the Electric Power consumption (kW power intake) of electric motors driving Pump Jacks in oil wells.
I am pretty sure this requires the use of a special type of meter due to the cyclic nature of the pump operation (along its cycle it goes from high to low % Load values)...
We need to measure the Electric Power consumption (power intake) of electric motors driving Pump Jacks in oil wells.
I am pretty sure this requires the use of a special type of meter due to the cyclic nature of the pump operation (along its cycle it goes from high to low % Load values)...
I am still of the opinion that to implement this 'saver' the facilities have to have particular characteristics (type of processes, distance between the units and shipping point, scheduling flexibility, size of cargoes, shipper agreement etc). Therefore, it may not be feasible / applicable to...
Answer just came in: 140 deg. F out of the process.
There will be losses along the line from process to terminal.
On top of that, there will be some time at the tanker before they can certify the shipment. Probably not much, unlike crude from the fields, this one would not have water/sediment...
I'm trying to obtain information on the temperature of the oil once loaded on the tanker. I will post it if and when I get it.
For now, I'd assume that it may even be higher than 160 Deg. F.
I am not sure what is the discharge temp. of crude from the coking drums but it should be pretty high...
According to the person providing the information (contracts manager for the seller) the figures are 'significant'. It even seems to justify the additional charges they pay for special scheduling at the terminal they ship from (to insure prompt transit from process units to tanker).
Also, a 1...
A note just to share an answer to this post I received via e-mail.
Shipping the crude while still hot from the coking process results in the tanker not having to use its heaters thus reducing the cost of the freight. The seller adds a portion of that reduction to the crude's base price so he...
Would certainly appreciate comments/opinions on this.
Here is the case:
A premium (higher price) is paid at receiving terminals for Crude from upgrading processes (e.g. delayed coking) depending on its temperature when it reaches destination. The particular case I know of refers to terminals...
Yes, the issue of charges and fines for low PF will be taken into consideration. Thanks Waross.
About "efficiency" (LionelHutz comment), indeed there has to be a consistent definition as to which variable we are trying to optimize. I would put it as "effective mass transferred per kWh" (which...
Thanks for the comments dpc.
About your first comment: Sorry if anything in my question hints at the fact that I may be equating % Load with % Energy loss. I believe I made only qualitative assertions, not quantitative. That is, I assumed that a partial load implies some loss of efficiency (not...
I am not EE and need to understand this issue a bit better (from the process energy use optimization perspective).
When an AC Induction motor operates under partial load conditions, the Power Factor and the motor Efficiency go down. There are a number of ways to resolve this issue but any of...
Don't know whether this will help you but it helped me to visualize what's happening in windgen and your question in particular (variable rpm by constant voltage up to the grid). I'm am a ChemE but have done work with VFDs in connection with Process Control applications. From that experience...
Correction / clarification on my previous post:
Ras Laffan cooling sea water units: 27 units is for stages 1 and 2 of the project. Additional stages will be added for the total capacity requirement of 256 MW. Single unit capacity is 7 MW.
Thanks
MS
www.3rps.com
