Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by 25362

  1. 25362

    [Need Help] Clean-Dirty-Service Heat Transfer Coefficient

    May be these rhreads may be of some helo: thread391-251669 thread391-248129
  2. 25362

    Why use Transfer Line Exchanger in steam cracker Instead of Shell and Tube Heat Exchanger

    This may be a better address: https://www.alfalaval.com/globalassets/documents/industries/chemicals/petrochemicals/business_case_transfer_line_exchangers_ppi00529en.pdf
  3. 25362

    Why use Transfer Line Exchanger in steam cracker Instead of Shell and Tube Heat Exchanger

    The following links may show additional reasons: https://www.alfalaval.com/globalassets/documents/industries/chemicals/petrochemicals/business_case_transfer_line_exchangers_ppi00529en http://www.arvos-group.com/media/1167/tranfer-line-exchangers.pdf
  4. 25362

    (Applied Thermodynamics)__How to calculate the specific volume of water, at 100ºC and 1.5 bar?

    From NIST webbook. 0.0010434 m3/kg.
  5. 25362

    Chemical to mix with water to increase evaporation rate.

    Look for a low-boiling azeotrope with no environmental risks. In any case, condense and collect the condensate for safe disposal.
  6. 25362

    Measure level in a 2 Litre Lab flow Reactor operating in CSTR mode; under pressure.

    Is it possible to weigh the assembly and estimate the level based on the flud's density?
  7. 25362

    Theory behind the Flowing fluid inside the pipe

    If the flowing fluid is incompressible, with p (rho) as density, a Pitot tube would measure total local pressure or stagnation pressure pstag=p+1/2pv2, while a static gage would measure p. The difference of the readings is the velocity head. The units in this equation can be Pa or N/m2.
  8. 25362

    Dynamic or kinematic viscosity with gear pumps

    Just a counterintuitive curiosity, the kinematic viscosities of gases can be greater than those of lube oils. http://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.html
  9. 25362

    second law efficieny of HE

    See Heat Exchanger Efficiency Article in Journal of Heat Transfer · September 2007
  10. 25362

    second law efficieny of HE

    According to that equation, if hot water and steam have the same TH, for equal heat duties Q, and equal TL, one gets equal ΔS?
  11. 25362

    second law efficieny of HE

    As I see it, and I may be mistaken, the thermal efficiency of a heat exchanger is generally expressed as the ratio of the actual heat transferred to the optimum heat transfer Qopt = UA (AMTD). Each case has a different Qopt. Us-w > 2 Uw-w AMTD for steam-to water: (131+60)/2 = 95.5 °c...
  12. 25362

    Calculation of Fan work by VdP and the adiabatic process where PV^(gamma) = Constant; which is OK?

    My "old" copy is dated 1983.
  13. 25362

    Calculation of Fan work by VdP and the adiabatic process where PV^(gamma) = Constant; which is OK?

    Get hold of Fan Engineering, an Engineer's Handbook on Fans and Their applications. Edited by Robert Jorgensen Published by BUFFALO FORGE COMPANY, Buffalo, New York
  14. 25362

    Heat generated by pump

    Would thread798-424587 be of help?
  15. 25362

    Why does the temperature increase in a liquid when pumped?

    One way to get a quick estimate of the liquid heat up by pumping is by calculating the work done on the fluid: ∆t=∆P/(ρ×Cp) Using consistent units.
See more

Part and Inventory Search

Back
Top