Latihan Materi Pertemuan Ke Enam [PDF]

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Saturated steam at 300 oC is used to heat a countercurrently flowing stream of methanol vapor from 65 oC to 260 oC in an ad The flow rate of the methanol is 5500 standard liters per minute, and the steam condenses and leaves the heat exchanger as l 1. Calculate the required flow rate of the entering steam in m3/min. 2. Calculate the rate of heat transfer from the water to the methanol (kW). volume gas metanol =



Senyawa Metanol (v)



Senyawa



5500 liter stp



n (mol) 245.54



a 0.04293



T1 =



65



o



T2 =



260



o



b 8.301E-05



c -1.87E-08



d -8.03E-12



Senyawa H, kJ/kg



Steam 300 C 2750.90



Water 90 C 376.8



r = kg/m3 m, steam = V, steam =



46.296 1.125729298675 kg/menit 0.024315752851 m3/menit



C C



Q = m.cp dT (kJ)



Metanol (v) 2672.593927985 Q = 2672.593927985 kJ/min 44.543232133083 Kw



from 65 oC to 260 oC in an adiabatic heat exchanger. eaves the heat exchanger as liquid water at 90 oC.



Saturated steam at 275,6 oC is used to heat a countercurrently flowing stream of methanol vapor from 50 oC to 200 oC in an a The flow rate of the methanol is 7500 standard liters per minute, and the steam condenses and leaves the heat exchanger as l 1. Calculate the required flow rate of the entering steam in m3/min. 2. Calculate the rate of heat transfer from the water to the methanol (kW). volume gas metanol =



Senyawa Metanol (v)



Senyawa



7500 liter stp



n (mol) 334.82



a 0.06134



T1 =



50



o



T2 =



200



o



b 0.0001572



c -8.749E-08



d -1.98E-11



Senyawa



Steam 275.6 C



H, kJ/kg



2785.00



r = kg/m3 m, steam = V, steam =



30.864 0.0324 1.6560257412222 kg/menit 0.0536552340156 m3/menit



C C



Q = m.cp dT (kJ)



Metanol (v) 3988.0411900112 Q = 3988.0411900112 kJ/min 66.467353166853 Kw



Water 90 C 376.8



from 50 oC to 200 oC in an adiabatic heat exchanger. aves the heat exchanger as liquid water at 90 oC.