Heat exchanger Q-T diagram 200 180 2 160 14 120 s40 Q(gJ/h) 一Thot-Tcol 2199 HENS 1: Targeting2/21/99 HENS 1: Targeting 3 Heat Exchanger Q-T Diagram 0 20 40 60 80 100 120 140 160 180 200 0 1 2 3 4 5 6 Q (gJ/h) Temperature (K) Thot Tcold