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59 12.7 Given Step response Pulse 20 = 4 response 16 Cstep Cpulse = 0.75 2 From the pulse response curve = = = = = 0.2 Vpz = (2) = 0.2 (2) = 0.4 note: no dead space So the flow model is Vp2=0,4 12.9 20 C Pulse response (1-1)20 Cpulse assume an Cstep exponential decay C e t,sec 40 t,sec 40 For mixed flow alone this should be this curve comes out early, meaning dead spaces are present This tracer curve shows that E =40 sec, thus = 2/3m3 2/3 Vd = 1/3 = m3/min and our flow model is = 3