6.4   Heater tube length and tube supports


The thermal performance needed from the heater fixes the heater surface in accordance with the methods given later in Section 6 of this chapter.

Assuming a heater surface of 1450 m2 as typical of the highest pressure heater for a 660 MW unit, the heater length and tube bundle support-plate pitch is found as follows.

      6.4.1  Length of U-tubes

      6.4.2  Tube support plates


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