32 34 36 38 40 42 44 46 48 0 50 100 150 200 250 aliran co current aliran counter current ∆t LMTD (°F) Ud (Btu/hr ft² °F 0 50000 100000 150000 0 50 100 150 200 250 aliran co current aliran counter current Q air (Btu/hr) Ud (Btu/hr ft² °F) 0 50000 100000 150000 0 50 100 150 200 250 aliran co current aliran counter current Q sream (Btu/hr) Ud (Btu/hr ft² °F)