Do power plants convert water into steam in 'batches' or at a continuous rate?
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Date: May 21st, 2024 7:08 PM Author: Rambunctious pit circlehead
It's a closed-loop system, for the most part. Water comes into the plant from the outside (usually from a river), where it's then treated, purified, super-heated, and pushed through a turbine to create electricity. On the other side of the turbine, the water is condensed and fed back into the system to be treated, purified, and super-heated once again. Most plants have multiple water treatment systems, and the amount of condensate passing through is insane: 16" carbon steel pipes pushing hundreds of gallons per minute at high pressure.
(http://www.autoadmit.com/thread.php?thread_id=5530808&forum_id=2#47681253) |
Date: May 20th, 2024 9:23 PM Author: Talented carmine school
They super-heat the water under pressure such that when the pressure drops it instantly becums steam
(probably; this is how I'd do it)
(http://www.autoadmit.com/thread.php?thread_id=5530808&forum_id=2#47678296) |
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Date: May 21st, 2024 6:54 PM Author: Rambunctious pit circlehead
heating condensate (water) in an enclosed space will cause the pressure to increase. they use super-heated (rather than saturated) steam because condensation can wreak havoc on turbines over time through steam erosion. Additionally, anything but ultra-pure condensate with low conductivity will cause even bigger problems, like boiler scale (which is almost impossible to remove), so you have to treat the condensate before it goes to the boiler to remove the undesirable stuff from it. You also want low conductivity condensate to mitigate the formation of large, unstable steam bubbles (steam bubbles won't burst as readily in water with high conductivity, leading to stability issues)
here's an example of a system that cleans condensate: https://i.imgur.com/w44atfI.png (and the control system for it: https://i.imgur.com/ZL1f3dh.png )
note the amount of condensate that each vessel can handle: 5,300 gallons per minute at 410 psig (~424.7 psia).
(http://www.autoadmit.com/thread.php?thread_id=5530808&forum_id=2#47681140) |
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