Skip to main content


Why does vacuum in steam condenser reduce or drop??

  1-High exhaust temperature: Vacuum drops or maintains at lower side due to high exhaust steam temperature flow into steam condenser. This high exhaust temperature is mainly due to 1-Operation of Turbine at lower loads 2-More clearance in labyrinth seals 3-Not operating exhaust hood sprays 4-More load on condenser 5-Breaking of ejector U loop 2-Low circulating cooling water flow Vacuum in condenser reduces due to inadequate cooling water flow through steam condenser. This is mainly due to; 1-Problems associated with pumps 2-Air pockets in pipe line 3-Leakages in cooling water line 4-Stuck of discharge valve of pump 3-High cooling water temperature at condenser inlet Higher cooling water temperature at condenser inlet results into reduction of vacuum due to poor heat transfer from steam to water 4-Poor heat transfer in condenser Very less or poor heat transfer in steam condenser reduces vacuum to very low level resulting into high exhaust temperature &am

33-most frequently asked questions & answers on air compressors

1-What are the functions of air compressors in power plants? The functions of the compressor is to take a definite quantity of fluid (air or gas) & deliver it at a required pressure 2-What are the applications of compressed/pressurized air in power plants? Operating the control valves Operating the solenoid valves Operating the dome valves in ash handling system Air dampers operation in fans Operating pneumatic tools 3-How does air compressor work? & what are the effects of compression on air? An air compressor takes in atmospheric air. Compresses it and delivers this air to a storage vessel from which it will be conveyed by the pipe line to the required equipments. Effects of compression: Air pressure & temperature increases & moisture content in air increases 4-What are the various types of air compressors used in power plants? Generally reciprocating, screw & centrifugal air compressors are used. 5-How does the positive displacement

Questions Answers on basics of instrumentations for Power plant Mechanical Engineers

1. What is an instrumentation? Instrumentation is the art of measuring a value of plant parameters. Or The technology which is used to measure and control the process system of plant is called instrumentation. 2. What is an instrument? An instrument is a device that transforms a physical variable of interest (the measurand) into a form that is suitable for recording (the measurement). 3. What is measurand? A physical quantity, property, or condition being measured. Often, it is referred to as a measured value. 4. What is a sensor? The portion of a measurement system that responds directly to the physical variable being measured. 5. What are the various variables measured in a power plant? Pressure, temperature, force, speed, frequency, current, voltage, resistance, time, displacement, acceleration, light intensity, density, pH, conductivity, flow etc. 6. What is calibration of a sensor? The relationship between the physical measurement variable input and the

Basic Questions & Answers on Slop/Spent wash fired Boilers

1-What do you mean by Slop or Spent wash? Slop or Spent wash also known as Vinasse is an acidic effluent produced in Distillery unit. Slop is formed on fermentation of Sugar cane molasses in distillery. 2-Why do you treat Slop as a Hazardous effluent? Because it is an acidic effluent having pH around 4 to 5 3-What are the standard parameters of Slop or Spent wash? Colour : Brown Odour : Pungent pH : 4 to 5 Solids: 9 to 12% BOD : 45000 to 60000 COD : 110000 to 1350000 HP HEATERS 4-What are the various methods of Slop disposal? Disposal methods: Biomethanation Composting Incineration Technology 5-What is the purpose of using incineration technology for Slop disposal? Incineration technology method leads to Zero Liquid Discharge, where spent wash is concentrated by heating it in specially designed Boilers. 6-What are the benefits of burning Slop in Boilers? TOP-6 BEST POWER PLANT O&M BOOKS Benefits: Zero liquid discharge (ZLD) or Zero eff