Dave,
Sorry to get in on this thread so late (I've been busy) but in all the replies I haven't seen what I feel to be the most significant points. At least in my humble opinion anyway.
If you want to maximize sootblowing, regardless of the motive source, here is what I have found, and have...
One more thing...
Going back to the original inlet steam conditions of 1450 psig and 950 F. Since this was being throttled by the 1st three governing valves (to the tuune of a 125 psig pressure drop across the valves), under these conditions does the steam temperature also decrease as the...
Hello to all...!
I was gone for a few days, but eagerly read all comments, and will attempt to respond to all.
First off the heat rate performed at the plant is performed monthly with the fuel input being determined by fuel delivered verses the fuel on-hand. The fuel feeders are nothing more...
Hey byrdj...
Yep, they do run the plant heat rate, but they usually only do it after the month is over, then look at the stats for an entire month at a time.
So, I'm eager to see the results. I'm not looking for some big blue-light special. What I'm hoping to see is an otherwise unexplained...
Some time ago I had posted concerning the potential benefit to operation our steam turbine with valves wide open. As it turns out, I have had the opportunity to run in this mode, so I need to bounce some numbers back to you guys who pushed me in the right direction before...so heres what I've...
Thanks for staying with me this long through this thread Latexman.
The control valve is upstream, so It looks like 1950 pph. Even so, why would the valve rating show 5200 pph at the steam conditions mentioned...that seems way off, doesn't it?
As far as full port or reduced, the only other...
Heres what I know of the valve:
It's a 1" Copes Vulcan control valve (either full open or full shut...not modulating)
It looks to be full port, though I can't find that on the specs, it just looks that way from the diagrams.
Nameplate data shows it has a maximum capacity of 5200 pph at 240...
Thanks one and all for the input, and no offense taken Latexman. I thought MY dad had somehow zoomed me once again.
Correct on the superheated steam constant. This is a full load value which we run at pretty much constantly. Same with vacuum (give or take a little depending on summer or winter...
Yeah...I knew there was more to this than meets the eye. Immpossible to measure the condensate a it's under vacuum when we're on line, and when we're off line, theres no steam flow through the line at all. (an extraction line).
But, thanks for the input. This gets me headed in the right direction.
Now thats funny right there. I don't care who you are.
Let me re-phrase...
Given this information, could someone either show me how to calculate the flow rate, OR calculate the flow rate for me then possibly, I hate to even hope...give me the answer?
In pph or kpph?
Say you have a 1" steam drain pipe (schedule 80).
On the inlet is steam at 200 psig and 500 F. It exhausts to a condenser at approx 25" mercury approximately 60' away. The I.D. is .96" (I think).
Can someone determine from this what the flow through the pipe is? Or is there a need for more...
I agree with Ed. Having tried (and failed) to locate condenser leaks with ultrasonic detectors, I'll use about anything else first. Too much background noise.
Thanks for the additional information. The web site article was quite helpful, though it'll take me awhile to digest some of it. Good examples of the physics involved, and will no doubt lead me to post more questions in the future. I'm very much impressed with the expertise demonstrated in...
Thankya to both Jensgisla & buzzp!
AS a CRO, I know how to make the turbine generator operate...I'm just wanting a better understanding of why it works that way.
I reckon it follows then, that the grids alternating voltage would tend to oppose allowing the generator speed to either slow OR...
I'd say minimal or no adverse effects. Going from 750 to 680 F on inlet steam temperature drops superheat at the throttle from approx 270 to around 200 F. (provided the pressure remained at 540 psig)
Most turbine manufacturers bottom line is a minimum of 100 F superheat before admitting steam...
What is it that hold a generator in synch with the rest of the grid. My way of thinking, the magnetic field produced by the generator must be of opposite polarity as the magnetic field of the grid...so they attract each other.
Is that close...? Or should I go ahead and take that fuel handler...
In the event of a boiler trip (MFT), under certain conditions, the boiler fan train will trip as well via interlock (extreme negative furnace draft, for instance).
My question is this...
Is there a requirement (code?) that prevents attempting restart on a fan (900 HP) unit it coasts down to...
