Thank you for your kind response.
Actually, I've checked several other correlations, and the Reynolds number is in the denominator, and the Nusselt number may not be very small, because j=Nu/(Re*Pr^1/3).
The thing is, I now cannot see the details of the specific reference the author used...
Dear all,
I think the ESDU Correlation to get the j number in the book HEAT EXCHANGER DESIGN HANDBOOK written by T.KUPPAN (in both editions) is wrong, or maybe it is a printed mistake.
I think it should be Re^(-0.3) instead of Re^(+0.3) in this equation.
Since I cannot find more support...
Thank you for your response. The heat is enough to heat the water from liquid state to dry gas state. But I am not sure about the design process of the HX.
Dear all,
In my design, water will be heated by hot gas from liquid state to gas state to get high temperature steam.
In order to meet the compact requirement, is there a possibility to complete the whole heating process inside just on shell and tube HEX?
I am using the Bell-Delaware method to...
Thank you very much.
The low fin is not satisfactorily effective especially on the gas side (shell side). I will try to find the high fin factors and use them to do the calculation and comparison. I will do the pressure drop too to see if its too high for requirement. Thank you again.
Thank you for your response.
Details not determined yet. I see what you mean. But my puzzle is, I used commercial software to do the primary design and I guess most factors in the software for low-fin tubes are empirical (rather than numerical solutions), but why don't they have factors for...
Dear all,
I am now trying to design an effective heat exchanger used for heat recovery from high temperature gas(higher than 450 C).
The gas is supposed to flow outside the finned tubes. However, the Aspen Exchanger Design & Rating software seems only be able to design low fin tubes, with fin...
