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

What is the Difference between CNC and PLC

1 Answers  

---

applications of 1-5v and 4-20ma?

4 Answers  

---

Which tank weighing system is better to install (Accuracy point of view) 1) Tank weighing system with 3 load cell or 2) Tank weighing system with 4 Load cell

0 Answers  

---

Which type of pressure can be measured by these elements?

0 Answers  

---

What are the materials available to prepare individually for competetive exams in Instrumentation field? Plz reply...

0 Answers  

---

how to rectify the poor signal strength in utrasonic digtial flow meter ,model:ge digital xce868i

0 Answers   KNPC,

---

What is Fieldbus?

3 Answers   NSL,

---

if a tank is contaning oil and water than how can we measure the oil and water level seperately

3 Answers  

---

What is difference between flame retardant & flame resistance cable? Among which type of cable is used for ESD & Fire and Gas system application?

1 Answers  

---

What is the relationship between GAIN and PROPORTIONAL BAND.

1 Answers   Kharafi National, Sabic,

---

how to calibrate steam control valve in steam turbine

0 Answers  

---

we are using centum vp as monitoring with Dell precision work station T3600 but some times PC(s) are restarted automatically . how we can solve this problem? thanks

0 Answers   Oil India,

---