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  1. MechEng1995

    Cooling Tower Vendors

    We are building a new Combined Cycle Power Plant. I am looking for viable vendors to supply and erect the cooling tower. It will be a 10 Cell, Mechanical Draft, Counter Flow, FRP Tower at 132,000 GPM circ. water flow. We had a bad experience in the past with a vendor that went bankrupt midway...
  2. MechEng1995

    Cooling Tower Piping Challenge for New Power Plant

    MJCronin, Thanks for the response. We did look at all of this. We are into rock at grade and can not blast. The excavation costs are incredible. Above ground pipe is the leading contender at this point. We have not worked out all of the details yet - Hence, my posting. I am fishing for...
  3. MechEng1995

    Cooling Tower Piping Challenge for New Power Plant

    We are building a new 550MW Combined Cycle Power Plant (3 CTs on 1 Steam Turbine). We have been planning on using a 10 Cell (Back to back), Mechanical Draft, FRP cooling tower with undergound circulating (cooling) water piping to the tower. This piping feeds each cell from a riser stub up from...
  4. MechEng1995

    Pulverized Coal Flow Measurement Testing Requiremetns

    A knife gate valve. No valves are upstream of the test ports, however, some are immediately downstream. (i.e. 2 to 3 D) The only thing other than elbows are victaulic couplings. Some pipes have a vic. coupling 2 to 3 D upstream from the ports. We have anywhere from 7 to 10 diameters...
  5. MechEng1995

    Pulverized Coal Flow Measurement Testing Requiremetns

    I am an engineer at a fossil fired boiler power plant. We are redesigning the coal nozzles for lower NOx. The units in question are equipped with CE Raymond Bowl Mills (RB-533) and B&W MPS-67 Pulverizers. We have hired a testing outfit to perform an isokinetic coal flow test on the coal...
  6. MechEng1995

    Boiler Tube Wastage Rates

    This boiler is the largest (3X the next largest)and only oil fired unit of the fleet. I have no similar boilers to compare it to. Obviously this adds to the challenge since oil ash is going to erode the tubes at a different rate than coal ash. The intent of my original post was an attempt...
  7. MechEng1995

    Boiler Tube Wastage Rates

    I am conducting a study of one of our power utility boilers (3,195,000lbs, 1005F, 2590psi) in order to determine the remaining life of the major components. My references for the study are past boiler inspection reports and life assessments. I have developed a tool to perform all of the basic...
  8. MechEng1995

    Fossil Fired Boiler Fly Ash Erosion vs. Flue Gas Velocity

    B&W's "Steam" offers information on the relationship between fly ash erosion of boiler tubes and flue gas velocity. They state than the metal loss on convection pass tubes is proportional to the total ash quantity passing through the boiler and is an exponential function of flue gas velocty...
  9. MechEng1995

    Creep Analysis Using Larsen-Miller Parameter Method

    I am attempting to utilize the Larsen-Miller Parameter (LMP) Method to determine the remaining life (Creep failure) of superheater and reheater sections of coal fired boiler (1.1M lbs/Hr, 1850psi /1000F/1000F). Upon application of this method I am realizing that there are many different...
  10. MechEng1995

    160 MW Fossil Unit Feedwater Heater Drain Cooler

    I am retrofitting a Horizontal Low Pressure Heater Train with drain pumps. The current configuration is a pure cascading drain design from high to low and to the condenser. Our performance engineers determined that we could realize a heat rate improvement by pumping the #2 heater drains back...
  11. MechEng1995

    Feedwater Heater Drain Pump

    I am retrofitting a Horizontal Low Pressure Heater Train with drain pumps. The current configuration is a pure cascading drain design from high to low and to the condenser. Our performance engineers determined that we could realize a heat rate improvement by pumping the #2 heater drains back...

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