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  1. Pederator

    GT + water WHB

    Thank you very much guys for help. From my updated information I know that this kind of configs are not common, but they do exist.
  2. Pederator

    GT + water WHB

    Hi everyone, do you know if it is possible to use waste heat from open cycle gas turbine in a recovery boiler, instead of steam producing water (probably for district heating, that is max 130 deg C at about 8 bar). The expected nominal power of the gas turbine is 22 MW, and heat recovered from...
  3. Pederator

    steam tables

    What properties of steam do you need for this? Do you use any software for simulation, or is it rather rough, "hand" calculation for one case? I sometimes use website steam tables when I have relatively simple case to calculate in my work, for example check calculations. But for more in-depth...
  4. Pederator

    Demineralised Water Plant Sizing and Costing

    Is this combined cycle gas turbine plant? What is the steam flow rate?
  5. Pederator

    steam tables

    What do you need steam tables for?
  6. Pederator

    Live steam piping valves joints type

    Thanks for your valuable comments. The design code is EN 13480-3. I do not know the reason why contractor wants to use flanged connections on valves. Maybe unification of supplies, as all - or at least most of - other valves (eg. on turbine bleed pipings) are flanged, or just experience / habit...
  7. Pederator

    Joining perpendicular piping as "pipe in pipe"

    BigInch, yes, I am a kind of design QA/QC, among others.
  8. Pederator

    Problem with the use of vector elements in Given-Find block

    Because i ususally find elements that are not started from 1, and also these are various variables, ie. m.4, m.7, m.8, m.9, h.7, h.9 etc. Above was just an example.
  9. Pederator

    Joining perpendicular piping as "pipe in pipe"

    Tees are not mentioned in Technical terms of reference - this can be a flaw. The system is not going to operate in high cycling regime, and there are no seismic shocks on the location. I do not care about the money - this is not my money, the contract is already awarded, and remuneration is...
  10. Pederator

    Problem with the use of vector elements in Given-Find block

    Can you please attach an example or explain more detailed? I used to assign Find to a column vector, ie. (origin 1) |x[1| |x[2|:=Find(x.1,x.2,x.3) |x[3| Thanks for help.
  11. Pederator

    Joining perpendicular piping as "pipe in pipe"

    In fact we are the Contract Engineer for this project (I think this means the same as your "Contract Administrator"). The plant is located in eastern Europe. The construction company works under contract agreement, not "sub-contract". The obligatory piping design code is EN 13480-3 (probably the...
  12. Pederator

    Joining perpendicular piping as "pipe in pipe"

    Thank you guys for your reply. Pennpiper, the problem is that I do not know if I (or we, as a company) have a "tool" to force the contractor to use tees. Technical terms of reference do not talk about this issue (at least not directly - there are mentioned standards such as EN 13480 etc.). So...
  13. Pederator

    Joining perpendicular piping as "pipe in pipe"

    Hello all, Currently the company I work for services as technical advisor for the construction of CHP plant. The contractor, instead of joining perpendicular pipes by tees (T-elements), is going to join pipes as "pipe in pipe". This is regarding for example steam bleeds / extraction pipings...
  14. Pederator

    Live steam piping valves joints type

    Hello all, I work for the company that is currently technical advisor for the construction of CHP plant. The contractor wants to use flanged valves on the live steam piping DN200 PN100, 40 bar, 400 deg C. From my information, welded joints shall prevail. Can you tell me what is your opinion...
  15. Pederator

    Problem with the use of vector elements in Given-Find block

    Hello all, I have such a problem - I want to use vector elements variables, ie. x[1 instead of x.1 in the Given-Find block, but I can not, because I get "Something is wrong with the solve block used to define this function" error. Anybody know why I can not use vector elements variables? I have...
  16. Pederator

    mollier chart

    Chicopee, i think you misuderstood him when he asked "usually 2 value are enough to calculate enthapy or entropy but how to h or s when only one value is given?" - from my understanding he wanted to find p, h and s for the given temperature (400C). If I am wright, he does not know what is...
  17. Pederator

    mollier chart

    However this seems to be - like IRStuff said - a homework problem, I will answer you. The given values allow to conclude that the medium is steam. You should write it. Secondly, the process seems to be expansion in steam turbine. I will show you one of the ways how you can find if using...
  18. Pederator

    CHP with gas turbine bsaed

    Sorry, I live in eastern europe. But it still interests me.
  19. Pederator

    CHP with gas turbine bsaed

    "if you neglect to evaluate alternative energy technologies, you may be stuck with a useless plant , as had happened in western Europe in the last 2 years" Can you please expand and clarify this sentence? I live in western europe, and I am curious what are you exactly talk about.
  20. Pederator

    Steam Properties algebraic approximation

    It seems that he do not need to look inside the codes that are "pretty much what one would use for Matlab" or looking into the formulae of some steam model. Why would he if there is ready to use library for Matlab? Waste of time. I know something about that because once I implemented IF97 steam...

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