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  • Users: SteffenH
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  1. SteffenH

    heat transfer coefficient of 50 000?

    hello again, I got insane heat transfer coefficients. Average velocity of 1.5m/s, gets Re 152 000 for liquid Ra134a. With that I get C1 0.021 and m 0.84, C2 0.98, Pr 3.32 Cross flow about aligned pipe stack. so C2*C1*Re^m*Pr^0.36 gets me about 50 000? formulas from Fundamentals of Heat and mass...
  2. SteffenH

    heat transfer coefficient parallel to pipe axis

    Hello, can I calculate heat transfer parallel to pipe axis with the same formulas as heat transfer along a flat plate? I was reading several articles and there is always just heat transfer perpendicular to pipe axis. As the pipes are quite long, flow is turbulent, so I think, the HTC will be...

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