1-2 and (b) the annual savings in dollars if the cost of electricity is 0.10 S/kWh. In a process, a blower is used with the flow-rate profile shown in Fig. Pl-2a. Using the information in Fig P1-2b, estimate the percentage reduction in power consumption resulting from using an adjustable-speed drive rather than a system with (a) an outlet damper and (b) an inlet vane. 100% % Flow rate 1000 (a) Power Consumpoon of flow) 10% 20% % of time Figure P1-2 100 4 (b) 80 Ovde demper 70 60 % Flow Rate Islet vane Electe drive 50 40 30

Fig: 1