Question { JSW, 2111 }

What are the effects of corona in switch yard.

Answer

High voltage lines during cloudy and rainy seasons create ionization of air surrounding the surface of conductor giving audible, violet, visible, intermittent discharge called corona.

Corona creates hissing sound, vibrations and power loss and radio interference
Refer for more information on basics of electrical.
https://www.powerplantandcalculations.com/2020/07/60-best-questions-answers-on-basics-of-Electricals-for-powerplant-mechanical-engineers.html

& website
www.powerplantandcalculations.com

Question { Thermax, 9765 }

how many safeties should be present in boiler?what are they?

Answer

Boiler interlocks:
1-High & low drum level trip
2-High furnace draught trip
3-Safety valve
4-Boiler explosion vents

Also refer following link to get more information on Boilers
https://www.powerplantandcalculations.com/2020/06/why-how-these-in-boilers.html

Question { Perfect Line, 2448 }

What is excitation current and voltage in hydro power plant ?

Answer

Refer following link for information on Excitation, PMG, AVR ,power generation in power plants
https://www.powerplantandcalculations.com/2020/05/pmg-excitation-avr-power-generation.html

Question { 7980 }

What is wheel chamber in steam turbine?is it impulse blades are called wheel chamber in the steam turbine?

Answer

Wheel chamber is a chamber provided on HP side of after impulse wheel.
The most of the (>50% of pressure at rated load) drops at wheel chamber,..AT lower load wheel chamber pressure drops.
As a thumb rule wheel chamber pressure is calculated as
Turbine wheel chamber pressure (kg/cm2) = (Turbine inlet pressure (kg/cm2) X Turbine operating load (MW) X 0.6)/Turbine rated capacity (MW).

Also refer QnA on Turbine
https://www.powerplantandcalculations.com/2020/06/steam-turbine-practical-questions.html

https://www.powerplantandcalculations.com/2020/05/vacuumtroubleshooting-steam-turbines27.html

And refer website
www.powerplantandcalculations.com

Question { MPL, 2071 }

why do we use contro fluid tank (cft)in turbo generator area(tg) in power plant?

Answer

Control oil is used for
1-Governor to operate the valves as per load requirement
2-To operate ESV

Refer below link for more information
https://www.powerplantandcalculations.com/2020/06/steam-turbine-practical-questions.html

Question { MPL, 1909 }

what is need of primary water system in power plant?

Answer

Water is basically the combination of 2 parts of Hydrogen & 1 part of Oxygen. It is very impossible to get pure water in the nature . Pure water does not exist in nature due to its characteristic as solvent. Number of matters like gases, minerals and organic materials dissolve in the water easily.
Water mixes with fine particles wherever it flows such as silt, sand, iron,mud & organics etc. Biological growths like algae & bacteria take place in the water. Thus, water is usually contaminated with dissolved & un-dissolved solids along with living matters!
Raw Water sources in nature:
Rain water:
Surface water:Rivers, Streams, Ponds, Lakes, and Reservoirs
Ground water :Springs, Shallow Wells and Deep Wells

Refer the link for more information
https://www.powerplantandcalculations.com/2020/05/power-plant-water-sources-impurities.html

Question { 4669 }

Power plants are called CPP,IPP,LLP What is the meaning of it? And tell me some other type of powerplant names.

Answer

CPP : Captive power plant
MPP : Medium pressure power plant
LPP : Low pressure power plant

Refer below link more more idea
https://www.powerplantandcalculations.com/2020/05/introduction-to-power-plant.html

https://www.powerplantandcalculations.com/2020/05/understanding-specific-terms-for-power.html

Question { 1670 }

what is water consumption rate of water to condense one ton steam in condensor.

Answer

As a rule of thumb Around 65 MT of cooling water is required to condense the steam at rated vacuum.

Refer below link for more information
https://www.powerplantandcalculations.com/2020/05/steam-condenservacuum-and-calculations.html

Question { 1513 }

What vibration parameters are monitored in a directly coupled single cylinder turbine and generator?

Answer

Turbine vibrations are measured on Turbine front , rear & thrust bearings
Gear box bearings
ALternator bearings

Also refer
https://www.powerplantandcalculations.com/2020/06/why-do-vibrations-occur-in-machines.html

Question { 1539 }

Why cold water is used for Boiler Hydro test

Answer

As the temperature increases, the hydraulic test pressure decreases
Normally 20 to 50 degree C water is used for boiler hydraulic tests

Refer below link for such questions & answers
https://www.powerplantandcalculations.com/2020/06/why-how-these-in-boilers.html

Question { 1373 }

How to calculate air to fuel ratio in boilers

Answer

Refer below llink
https://www.powerplantandcalculations.com/2020/05/understanding-specific-terms-for-power.html

Question { 1315 }

Why the steam Turbines are Designed Higher side compare to Alternator

Answer

As there will be loss in power in Gear box

net power generated = Total power generated X Turbine Mech.eff X Gear box eff X Alternator efficiency..

For detailed information on power generation..
May refer
https://www.powerplantandcalculations.com/2020/05/pmg-excitation-avr-power-generation.html
https://www.powerplantandcalculations.com/2020/05/understanding-of-heat-rate-and.html

www.powerplantandcalculations.com