... multipass shell-and-tube heat exchangers and one-pass cross-flow exchangers.119 a. F for a one-shell-pass, four, six-, tube-pass exchanger.b. F for a two-shell-pass, four or more tube-pass exchanger.Figure ... Krauss.) 124 Problems 1313.13 Air at 2 kg/s and 27 ◦C and a stream of water at 1.5 kg/s and60◦C each enter a heat exchanger. Evaluate the exit tempera-tures if A =12m 2 , U = 185 W/m 2 K, ... The heat exchange surface for a steam genera-tor. This PFT-type integral-furnace boiler, with a surface areaof 4560 m 2 , is not particularly large. About 88% of the areais in the furnace...