Jim Lansbarkis

Daniel, thanks for looking into this. I just downloaded 6.6.3 and am still seeing an issue. My stream is ethylene at 200C/200psig with a ss tube 100' long that is 0.25" OD x 0.18" ID. When I run the piping segment calculation without the external HTC I get 47.6C, which is reasonable. When I add the external HTC with air and 0 m/s wind I get 199.95C. With a 0.1 m/s wind I get 68.5C. 1 m/s = 53C. 10 m/s = 49C. 100 m/s = 48C. Shouldn't adding the external HTC lower the 47.6C as the wind is removing...

I have noticed some unusual behavior in the pipe segment calculations. I am trying to model heat loss in sample lines estimating the overall heat transfer coefficient and including the external HTC with Air as the environment with a 10 m/s velocity makes the calculated outlet temperature go up, rather than down as expected. I have tried several different fluids, inlet temperatures, inlet pressures, and pipe lengths and the outlet temperature goes up in all cases. At 100 m/s, the temperature increase...

Daniel, the new download fixed the problem for me. Thanks.