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Recent content by Mac001

  1. Mac001

    HELP ON AMMONIUM SULFATE SOLUTION

    Does anyone know where to find or how to calculate the properties of a solution water + 30% (in vol)ammonium sulfate ? ( or similar). I need viscosity, conductivity , density , heat capacity and enthalpy . I've asked to my customer, but it's a huge company and it's difficult to get an answer (...
  2. Mac001

    HEELP !! safety Tubes ( double wall)

    Thank you very much for the help and the precious tips !!
  3. Mac001

    HEELP !! safety Tubes ( double wall)

    Actually the tube is finned on both side internally and externally . THe question is how it will behave externally with the new fins? Thank you very muche for the tip for the series !!
  4. Mac001

    HEELP !! safety Tubes ( double wall)

    By the way I have another issue !! THe tube is finned with 19 FPI geometry. the conductivity value that i'm going to insert will not "interfere" with the parameters of the finns ( which are in copper). I mean it has sense simulate the air just changing the conductivity values , or it's a too...
  5. Mac001

    HEELP !! safety Tubes ( double wall)

    Oops i forgot, the temperatura will be around 40°C
  6. Mac001

    HEELP !! safety Tubes ( double wall)

    Right question !! Since the pressure will be at around 15 bar. Since the conductivity is very low, this could be a relevant step in the right direction !! Thank you very much for the tip !! Do you know where I could find a table with these values ? Thank you very much !!
  7. Mac001

    HEELP !! safety Tubes ( double wall)

    THank you for the help !! By considering the air a pure conductive medium, I should consider it like a tube with a thickness of 19.05-12 =3.5 mm with a resistance due to the sum of (2.5/K(copper) + 0.25/K(air) +1/Kcopper) or more simply 0.25/K(air).
  8. Mac001

    HEELP !! safety Tubes ( double wall)

    Hi there !! How can I calculate with HTRI an exchanger with double wall tubes. It's practically a safety exchanger with a OD 19.05mm ( ID 14.5 mm) 19 FPI copper tube on the outside and 1 OD 14mm tube on the inside (ID ~12 mm)? Hoe can I simulate such a tube ? (Let's say that: in the...
  9. Mac001

    difference AISI 316 L and 316 Ti with smoke

    I mean For the condensing unit .. tubes in Cu/ni and plates cladded with Cu/ni
  10. Mac001

    difference AISI 316 L and 316 Ti with smoke

    What would happend ,if I would use Cu/ni instead of AISI 316 for the tubes and I would clad the plate with AISI 316?
  11. Mac001

    difference AISI 316 L and 316 Ti with smoke

    The heat recovery will work with water up to 95°C ( in the first exchanger)and 45°C ( in the second) .. the working temperature of the tubes will be very low, in counterflow will be approx 200-250°C The plant will be located in Germany in an industrial zone , but i don't know other details...
  12. Mac001

    AISI 316L AISI 316 Ti selection help

    What's the difference betwheen 316L and 316Ti in tubes 18mmx 1mm in contact with CH4 smoke ? at 450°C and with condensate (PH 2-3) at 120°C thank you in advance !!
  13. Mac001

    difference AISI 316 L and 316 Ti with smoke

    I'm working at a heat recovery exchanger connected in line with an CH4 engine . the fisrt exchanger will have inlet temp 440° and outlet temp 120°C The inlet temperature will be 120°C and outlet 50°C. I'm selecting the tubes material and i'm considering AISI316L but a some source insist for...
  14. Mac001

    HELP SEALS BIOGAS

    Thank you for the advice !!
  15. Mac001

    HELP SEALS BIOGAS

    Other data: Temperature 30°C Pressure from 0.5 Bar to 1 Bar the vapor content is max 10% The trouble is which kind of gasket shall I use !! It's difficult to find a polimer which works well with all those materials !!
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