Answer / r.murugan

important closed loop in boiler side
1.Drum level control (single element control and three
element control)
single element control : only drum level
three element control : steam flow, feedwater flow, drumlevel

2.boilerfeedpump scope control,super heater spray
temparature control,hp heater level control,lp heater level
control,presure reducing control,dearator level control
o2 master control,

turbine side control: speed control (during start up),load
control,intial pressure control,exhaust temp control, load
drop control,oiltemp control,

open loop control based on unit capacity

Answer / ch amir islam

dear infact numbers of loops eitherr thz r open or close
depends on the required system & process.any how these
loops are used on demand of process.as relitively ur
question in which kind of system u want to ask about
COMBINE CYCLE POWER PLANT or OPEN CYCLE POWER PLANTS.open
loops depends on the system reliability if u want to check
morer parameters on ur HMI or at CONTROL DEVICE

How EMF is generated in Thermocouple

3 Answers  

---

Can I calibrate the Electromagnetic Flow Meter on line and How.

0 Answers   SEWA,

---

In vortex flow meter how can measure the frequency of vortex generated by vortex flow meter

4 Answers   Cadila,

---

I m appointed as an automation trainee engineer in small firm in that I am only the one , my company give me a project on s7-200 as i m beginner I don't know how to program so please send me the helpful site so that I complete my project before deadline....please help me out in this critical situation.

0 Answers  

---

Working principle of vibration sensor?, Type of vibration sensor? , Can we use vertical instead of horizental or vice versa?, if not Reasons?

2 Answers  

---

GIVE BRIEF DESCRIPTION ABOUT "DCS"

2 Answers  

---

what is mean of 3 by 2 automation ?

5 Answers  

---

what is the deluge ? How can its working?

2 Answers   KOC,

---

If we increase only P what will be controller action ?

0 Answers   IMECO,

---

What s PDS & PDMS tools ?its role in instrumentation?

1 Answers  

---

in which application we use bigger size actuator

5 Answers  

---

how to calibrate transmitter

3 Answers   Sabic,

---