Dearator Pressure
Dearator Pressure
(OP)
Hi,
How can the dearator pressure affect the production of a Stem Turbine?
How can the dearator pressure affect the production of a Stem Turbine?
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RE: Dearator Pressure
If by turbine "production" you mean hp or kw then the usual issues are the degree of superheat at the turbine inlet and the discharge temp/pressures.
RE: Dearator Pressure
Another thing I find strange is that one of the vents in the deaerator spits water while the other doesnt and it is working at its normal level.
RE: Dearator Pressure
The steam vent operation have to do with the internals of the dearator. In the tray type, if you are flooding the trays, you might get the "spitting" referred to. I have not worked with the spray type. Take a look at the operating manual. They usually have a good over-view.
The vent it self is usually a "restriction orifice". If the plant is pretty old, it can be erroded, and require replacement.
RE: Dearator Pressure
RE: Dearator Pressure
RE: Dearator Pressure
That means that you don't want to use any more than you have to, and you want to use it at as low an extraction pressure possible in order to get all the useable work possible out of the steam.
If you have any other way to pre-heat the make up water to the DA, that would help reduce your steam consumption.
The DA is only going to pull the steam it can condense except for the spitting part. That is puzzling.
If you are spitting water, you have some kind of problem internal to the DA. Level control would lbe my first place to look.
rmw
RE: Dearator Pressure
We run 3 50MW plants and the one giving 1 MW less happens to have about 0.5bar nore pressure in the DA.
RE: Dearator Pressure
You might have 1 MW (2%) difference between 2 units for reasons totally unrelated to the DA; turbine internal seals, for example, or dirty condenser or consenser with more plugged tubes or a large squid on the inlet tubesheet.
rmw
RE: Dearator Pressure
do you have the same steam temperature going to each TG?
RE: Dearator Pressure
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RE: Dearator Pressure
RE: Dearator Pressure
(At 102 barg inlet the sat temp is 313.2C for a SH of 68C)
you can identify the possiblity of leakage by taking a look at valve position on the DA pressure control valve, if it is much different that the valves on the other DA's then you likely have fugitive steam getting into the system
RE: Dearator Pressure
RE: Dearator Pressure
rmw
RE: Dearator Pressure
good luck
RE: Dearator Pressure
It does fluctuate with load and how is it related to the condenser problema?
RE: Dearator Pressure
RE: Dearator Pressure
rmw