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  1. boilerdoc

    Boiler Selection - Fire Tube vs. Water Tube

    Hi leverage, should be no problems to find firetube boilers for your steam parameters, specially if you want to downsize. The advantage of firetubes are mainly in lower investment costs, and longer service life. Because of the higher internal water content they are slower in load changes. Hope...
  2. boilerdoc

    Miniature Steam Generator Required

    Hi JMOwen, you should be able to find this boiler with equipment suppliers for dry cleaning and laundry shops. Good luck
  3. boilerdoc

    Another CO2 question

    HRS, I am afraid you are right. I have just made some very optimistic calculations and found that with available technology it is far to expensive. Anyway it was worth thinking about.
  4. boilerdoc

    Software for Steam Plant Evaluation

    One of the most professional software for your application can be found at www.thermoflow.com This programs really are worth the money.
  5. boilerdoc

    Use waste heat to drive air-conditioning

    So you think about buying bottled Gas and burn it to drive a stirling engine with generator and use the combustion gas to power an adsorption chiller for AC purpose? For your generator unit with around 5 kW electrical capacity we talk about Euro 15.00,- to 20.000,- investment. These units are...
  6. boilerdoc

    Use waste heat to drive air-conditioning

    petermeachem, you did not mention what source your waste heat is coming from. The stirling works on external combustion processes. Unless there is any industrial or commercial activity around producing waste heat you have to burn some kind of fuel to drive your stirling engine.
  7. boilerdoc

    Use waste heat to drive air-conditioning

    Hi Petermeachem, if you think that the capstone microturbine mentioned by davefitz is too expensive for domestic use, better stop investigating in stirling cycle systems unless you are able to tinker your own machine. Stirling engines make sense when your fuel is really cheap like wood, other...
  8. boilerdoc

    Steam Coil Air Heater (SCAH)

    Hi GBurns, what was the purpose of a pressure test with 25 psig? What I do normally is a leakage test with air slightly above atmospheric pressure ( 0.5 bar ) and check with soap water for leaks at weldings and flanges. The pressure test should be done as hydrotest with water in case of a steam...
  9. boilerdoc

    90 percent gas furnaces for packaged units

    What the heck does this question want to ask ???
  10. boilerdoc

    Air cooled vs. water cooled chillers

    Consider that an air cooled condenser is also not maintenance free. Of course you need water treatment if recirculated water and cooling tower is used.Thats why I mentioned low cost cooling water like river water or well water in once through condensors.
  11. boilerdoc

    High flue gas temperature

    Hi refiner, if the damper was damaged by overheating I am pretty sure that your problem is somewhere at the burner area.I would check again on the fuel supply as mentioned also by combuster.
  12. boilerdoc

    High flue gas temperature

    You mentioned in your thread that the flue gas duct was overheated and the damper damaged.Was the damper damaged by overheating? One way to check for tube fouling during operation is to compare product mass flow and inlet/outlet temp with recordings before the problem.
  13. boilerdoc

    High flue gas temperature

    Hi refiner, can you give some more information about the furnace itself. There are acording to my experience 2 main reasons for high flue gas temp. Increase in energy input like higher flame temp.,increased fuel capacity etc. Or reduction of heat transfer due to tube fouling (deposits), change...
  14. boilerdoc

    Air cooled vs. water cooled chillers

    Hi sheenders, water has big advantage from the thermodynamic point of view.When cooling water is available at low cost,I would prefer water cooled chillers.Of course it depends on the climatic conditions your plant is situated to give qualified advice concerning the most economical way. For...
  15. boilerdoc

    Drum sizing estimation

    Steam drum design can not be done by rule of thumb or any tables.It depends very much of the boiler type and of course the boiler capacity.I don´t think it is very helpful to give any figures like m3/t of steam produced.
  16. boilerdoc

    Another CO2 question

    Hi TomSD, thanks for your detailed comments.That points the direction to go for.
  17. boilerdoc

    Another CO2 question

    Hi TomSD, thanks for your reply.There are helpful tips in it. You mentioned activated carbon to adsorb unwanted matters from the flue gas. If I remember correctly, Activated carbon is used to remove CO2 from fruit storage rooms with controlled atmosphere. Are there different coals available...
  18. boilerdoc

    Another CO2 question

    Hallo everybody, I got also a question similar to the thread of tangela from 02/13/03. My problem is: I would like to separate CO2 from flue gases to be utilized as fertilizer in green houses. This method is common pratice with natural gas combustion. What about combustion of oil, coal or...
  19. boilerdoc

    thermic fluid heater design?

    THE bible of thermal fluid heaters is written in german, but there is an english version with less pages available. Heat transfer with organic media by Walter Wagner. I don´t have the ISBN on hand, but come back to the forum if you have difficulties to find the title in a bookstore.
  20. boilerdoc

    Heavy Fuel Viscosity/Temperature graph

    Hi Mike, check www.steamesteem.com there is a shareware program and many other interesting stuff concerning fuel oil.

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