What are the steps to size a shell and tube heat exchanger?

Heat exchanger sizing steps: (1) Define thermal duty - from energy balance, heat curves for phase change. (2) Assign fluids to shell/tube side - corrosive to tube, high pressure to tube, dirty to shell (easier cleaning), condensing usually shell side. (3) Estimate LMTD - log mean temperature difference with correction factor F. (4) Assume overall U based on fluid types (tables available). (5) Calculate preliminary area: Q = U x A x LMTD. (6) Select tube parameters - diameter, length, pitch, material. (7) Calculate individual heat transfer coefficients - tube side (Sieder-Tate), shell side (Kern or Bell-Delaware). (8) Iterate U and area. (9) Check pressure drops against allowable. (10) Specify TEMA type and mechanical details.