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Recent content by Peckett

  1. Peckett

    Gas Turbine Proximity to Public Areas

    Hi Scotty, Thanks for your comments. LM6000 or similar. So aero derivatives with limited or no containment of rotor failure.
  2. Peckett

    Gas Turbine Proximity to Public Areas

    Hi, I wasn't aware that the turbine casings of the land based GT's were any different from their flying cousins. Would you have any information on the improvement in performance with disc failures and reduction in risk? I haven't found any useful statistics on frequency of GT turbine failure...
  3. Peckett

    Gas Turbine Proximity to Public Areas

    Hi guys, thanks for your comments. I'm looking at a new gas turbine facility in Australia. The NFPA standard provides good guidance on fire protection for enclosures and gas turbines. I was more thinking about protection from catastrophic failures such as disc failures. Do designers site gas...
  4. Peckett

    Gas Turbine Proximity to Public Areas

    Hi all, Are there any useful good practice guidelines for the separation distances from public areas for gas turbine power plants in urban areas? Can they be installed adjacent to roadways, for example. Any assistance appreciated.
  5. Peckett

    Chinese Turbines

    Hi, Thanks for your responses, they are appreciated. I agree with your posts, and will consider these issues when looking at the chinese turbines. We are at an early stage of project development, and so have only concepts on how we would use these turbines. Our intention at this stage is to use...
  6. Peckett

    Industrial Plant O&M Costs

    Hi all, We are planning to build a thermal sludge processing plant. Does anyone have a rule of thumb for Operating and Maintenance costs for industrial thermal plants as a % of capital? There are various figures for thermal power stations, but we would prefer an industrial equivalent. Many...
  7. Peckett

    Chinese Turbines

    Hi all, We are looking at chinese turbines as an option for a geothermal development. Small machines, around the 5MW mark. Does anyone have any experience with chinese geothermal turbines? They mostly look like industrial or power steam turbines without much enhancement for geothermal fluids...
  8. Peckett

    VIntage 1923 Structural Channel Section

    Dhengr, Thanks for this. Teguci's (struggling with the spelling on all these non-de-plumes!) channel did have a smaller web thickness, but was otherwise the same. One of my colleagues has found an early 20th century standard that has this channel with a 9/16th web thickness. So in an ideal...
  9. Peckett

    VIntage 1923 Structural Channel Section

    Thanks for all your messages. An interesting problem! dhengr, thanks for your practical comments. Your interpretation of the doubler is correct - it is bolted to the web of the channel. It appears to be fitted to the profile of the channel, producing a snug fit. So it seems that finding a...
  10. Peckett

    VIntage 1923 Structural Channel Section

    Tequci, Thanks for this. Weldign the plate to the channel is a possibility. The current doubler is bolted. Teh current bolted design is probably a slip critical connection, but I haven't checked this. I wonder if welding will give the same characteristics as a bolted connection. With the...
  11. Peckett

    VIntage 1923 Structural Channel Section

    Hi, I am restoring a 1923 Climax steam locomotive in New Zealand. The frame/chassis is made up of a pair of channels (one each side of the loco), each fitted with a doubling plate. The chassis is pretty corroded, and we are looking at replacing it. The channel has a standard section, except...
  12. Peckett

    Thermal Oil Steam Generator Life Assessment

    Hi all, We have two 30 year old thermal oil steam generators that we are looking at replacing. One has cracking on the furnace tubes, and we are concerned about the remaining life of the other boiler. We have had the cracks analysed and it appears to be thermal fatigue cracking. The cracks...
  13. Peckett

    Steam turbine rotor cracks

    Thanks for this advice. We have left the upstream stationery blades (diaphragms) in place as recommended by the OEM. OEM has adviced that a baffle could be installed, and we would get a slight increase in efficiency, but the cost is significant. Machine appears to operate well without stage 3...
  14. Peckett

    Steam turbine rotor cracks

    Thanks for the latest response. We have cut off the offending disc and the machine is back in service. Our crack was at the base/root of the disc. The rotor is a one piece forged rotor. and the crack was right around the upstream root of the stage 3 disc. The max depth was around 22mm...
  15. Peckett

    Steam turbine rotor cracks

    Hi all, We are working with the manufacturer to remedy this, and hence I am limited what information I can disclose at this stage. The small cracks are in the discs of the LP. I am interested in the scale of the cracks you have found in the past, and how this limited the life of the rotor. I...
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