How does the pressure in a steam header react to a sudden load change?

Chandrakanth_balusa

Gold Member
25
2
Hello People,
I have querry regarding the pressure variation in the steam header in the steam power plant.
if there is a sudden change in the load and the mass flow through the turbine has to be increased, i would like to know how it effects the pressure value? if yes how does this change influence the process?

could you also suggest me a nice resoure where I can study about the header and it operation.

thanks in advance

BR

Chandu
 

anorlunda

Mentor
Insights Author
Gold Member
7,518
4,248
This is probably a drum type boiler.

A simplified model would be to think of pressure as the integral of the mismatch between energy in and energy out. Actually, energy storage depends on both temperature and pressure, but in a simplified model, imagine temperature to be constant.

So what happens when you make a step change in energy out?

How does the control system respond to change the energy in? How long does that take?
 

Chandrakanth_balusa

Gold Member
25
2
This is probably a drum type boiler.

A simplified model would be to think of pressure as the integral of the mismatch between energy in and energy out. Actually, energy storage depends on both temperature and pressure, but in a simplified model, imagine temperature to be constant.

So what happens when you make a step change in energy out?

How does the control system respond to change the energy in? How long does that take?
so I understand from you response that the pressure is a function of energy in and out.
but if the pressure in the header varies, does it effect the process? I know that this variation is going to be for a very short time since the control system triggers the energy in based on the energy out value.

i am a bit curious to know what if the boiler takes a bit long to serve the energy in and the pressure in the header goes on reducing. mathematically is there any relation between pressure drop in the header and the output f turbine or torque or speed.

thanks in advance
 

anorlunda

Mentor
Insights Author
Gold Member
7,518
4,248
mathematically is there any relation between pressure drop in the header and the output f turbine or torque or speed.
Yes. Again speaking in very approximate numbers, turbine power is proportional to presssure times mass flow rate
 

Want to reply to this thread?

"How does the pressure in a steam header react to a sudden load change?" You must log in or register to reply here.

Related Threads for: How does the pressure in a steam header react to a sudden load change?

  • Posted
Replies
1
Views
5K
Replies
3
Views
1K
Replies
4
Views
22K
Replies
16
Views
3K
Replies
18
Views
93K
Replies
13
Views
19K
Replies
12
Views
5K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top