If you need help understanding a specific type of problem from Kern (e.g., 1-2 shell-and-tube exchanger sizing, condensing steam, or evaporator design), let me know, and I can explain the method without reproducing the manual.
P = (80-30)/(200-30) = 0.294 , R = (200-100)/(80-30) = 2.0 From Kern Fig. 18 (1-2 exchanger) → F_T = 0.93 Corrected LMTD = 92.7 × 0.93 = 86.2°C Process Heat Transfer Kern Solution Manual