Question 5 (Economic Estimation) (15 points) Figure D Figure A shows a heat exchanger network (HEN) consisting of heat exchangers HX, HX2,HX3. In the HEN network, initially stream P1 is heated from 25C to 150C using High-pressure steam (HPS) in HX1. The outlet stream from the reactor, P3 is cooled in HX2 from 250C to 150C using another process stream P2 that is heated from 130C to 230C. Finally stream P3 at 150C is cooled to 130C in HX3 using cooling water (CW) that is heated from 20C to 40C. Assume the following information in addition to the values given in the Figure A. Additional information 1. For all heat exchangers, the heat transfer coefficient U=20kW/(m2C). 2. The heat exchanger cost can be approximated by the equation CHX=KAn,whereK=2000andn=0.6 3. HPS cost: $190(kW-year); CW cost: $80(kW-year) 4. Capital charge factor (i)=0.23 5. Formula for Total Cost: Totalcost=(i{m=1n1(Chx)m})+{m=1n2(FCf)m} Where: Chx : total purchase cost of a heat exchanger (from Equation 2) i : capital charge factor, F: flow rate of mth utility Cf: cost of mth utility per unit flowrate (F) Answer the following questions 1-a) Calculate the surface area of HX1,HX2,HX3 1-b) Identify (T ) min for HX1,HX2,HX3 1-c) Determine the total annualized cost for HEN network in Figure D 1-d) Draw a Temperature-Enthalpy (TH) diagram for HX2 Question 5 (Economic Estimation) (15 points) Figure D Figure A shows a heat exchanger network (HEN) consisting of heat exchangers HX, HX2,HX3. In the HEN network, initially stream P1 is heated from 25C to 150C using High-pressure steam (HPS) in HX1. The outlet stream from the reactor, P3 is cooled in HX2 from 250C to 150C using another process stream P2 that is heated from 130C to 230C. Finally stream P3 at 150C is cooled to 130C in HX3 using cooling water (CW) that is heated from 20C to 40C. Assume the following information in addition to the values given in the Figure A. Additional information 1. For all heat exchangers, the heat transfer coefficient U=20kW/(m2C). 2. The heat exchanger cost can be approximated by the equation CHX=KAn,whereK=2000andn=0.6 3. HPS cost: $190(kW-year); CW cost: $80(kW-year) 4. Capital charge factor (i)=0.23 5. Formula for Total Cost: Totalcost=(i{m=1n1(Chx)m})+{m=1n2(FCf)m} Where: Chx : total purchase cost of a heat exchanger (from Equation 2) i : capital charge factor, F: flow rate of mth utility Cf: cost of mth utility per unit flowrate (F) Answer the following questions 1-a) Calculate the surface area of HX1,HX2,HX3 1-b) Identify (T ) min for HX1,HX2,HX3 1-c) Determine the total annualized cost for HEN network in Figure D 1-d) Draw a Temperature-Enthalpy (TH) diagram for HX2