Process-side heat transfer and pressure drop

Process-side heat transfer and pressure drop 

The tube inside heat transfer coefficients and pressure drop can be calculated using the conventional methods for flow inside tubes see Section 12.8, and Volume 1, Chapter 9. If the unit is being used as a vaporiser the existence of two-phase flow in some of the tubes must be taken into account. Bergman (1978b) gives a quick method for estimating two-phase pressure drop in the tubes of fired heaters. 

Typical approach temperatures, flue gas to inlet process fluid, are around 100°C. 

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Process-Side Heat Transfer and Pressure Drop... 

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