Hairpin heat exchanger

The hairpin heat exchanger, unhke the removable bundle TEMA styles, is designed for bundle insertion and removal from the return end rather than the tubesheet end. This is accomplished by means of removable spht rings which shde into grooves machined around the outside of each tubesheet and lock the tubesheets to the external closure flanges. This provides a distinct advantage in maintenance since bundle removal... 

The hairpin width and the centerline distance of the two legs (shells) of the hairpin heat exchanger are limited by the outside diameter of the closure flanges at the tubesheets. This diameter, in turn, is a function of the design pressures. As a general rule, for low-to-moderate design pressures (less than 15 bar), the center-to-center distance is approximately... 

FIGURE 6.34 Schematic of a hairpin heat exchanger. (Reprinted by permission of Koch Heat Transfer LR)... 

The Ballestra group uses a combination of U-tube cooler and a shell-and-tube heat exchanger for the cooling of S02/air with ambient air. MM and Mazzoni supply a vertical double-hairpin heat exchanger (a so-called trombone cooler) with air cooling. 

Calculate the lagging of the double hairpin heat exchanger assuming a heat conductivity coefficient, k, of the glass wool insulation material of 0.15 W/m°C and a heat transfer coefficient ha (W/m C) from the Al-cladding to the ambient air of 25 W/m C. 

Figure 3 A typical double-pipe or multi-tube hairpin heat exchanger, [g)...

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