Seeking experts to solve the flue gas heat exchange problem
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Flue gas volume of 40 m3/h (under standard conditions), naturally cooled in a DN80 mm pipeline (the pipeline is in air). What is the length of pipe required to cool from 600 degrees to 100 degrees? There are no relevant models available in the principles of chemical engineering that can be applied; I hope experts on site can help provide a solution! Thank you
1. Merely studying *Principles of Chemical Engineering* is absolutely not enough ； 2. For heat transfer from the outer wall to the atmosphere, a combined convection-radiation heat transfer coefficient formula is used. In this coefficient calculation formula, there is an outer wall temperature Tw, which is unknown; therefore, iterative calculations or the solution of a system of transcendental equations are required.
Quenching with a venturi can rapidly cool it to around 80 degrees.
Air preheating tubes are available now, aren’t they? There’s a liquid medium inside; I’m just giving a brief description