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

give classification of transducer based on type of application

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difference between null and deflecting instrument.

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How can we calibrate pressure and flow transmitter in the field(online)?

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how to calculate flow range in DP tx

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Dear friends, I have a question: We work on a project which has some boilers to provide steam for desalination unit. The boiler area is safe and the only hazard source is the fuel lines of boilers. I want to know according to NFPA standard which type of instrument should be selected on the fuel line: Eex Type or Non-Eex type? Thanks in advance

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what is solenoid valve?

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What is the function of positioner in control valves? does the control valve operate without positioner?

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What is the PLC configuration in Cement industry?

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why we are using drum level control valve air to close?

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Why we are measuring 4-20ma? Why we are not taking 0-20ma? Plz answer this

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why we are using 4-20ma why cant we use 4-40ma

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can anybody will tell me abiut PID controller.

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