A tank shown in Figure-2 below is used to mix methanol and salt. initially contains 1 m³ of methanol. Salt is provided into the t a volumetric flow rate of Fsalt = 0.2 m³ s1. A stream with perfect methanol and salt leaves the tank with a volumetric flow F = 0.1 m³ s1. As the flow is unsteady, the volume of mixture in V(t), is a function of time.
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- Q1. During a steady flow process in an open system the velocity of the fluid is increase from100 to 600 m/s, the specific volume is decreased from 5 to 2 m³/kg, the pressure is increased from 1 MN/m² to 2 MN/m². And the internal energy is increased by 120 kJ/kg. Find the change of enthalpy, and the work done, if the process is an adiabatic process and no change of potential energy. 01 03 ka foir 350 IN/m2 ond 35 °C rogoiuog hoot ot gonatont lumo untilit ita procouroProblems: 1. A tank that contains 20 gal of water in which 3 kg of salt has been dissolved completely is to be filled by a hose with water carrying 0.25 kg/gal of salt at a rate of 4 gal/min. The mixture is then stirred and the solution is being pumped out at the same rate. Find the function of salt in the tank at any given time.Air whose density is 0.078 lb/ft^3 enters the duct of an air-conditioning system at a volume flow rate of 450 CFM. If the diameter of the duct is 10 in. a.) determine the velocity of the air in fpm at the duct inlet. b.) determine the mass flow rate of air in lb/min.
- 2. Two liquids of different densities ( p, = 1,500 , Pz = 500) are poured together m3 m3 into a 100 liters tank filling it. If the resulting density of the mixture is 800 kg find the respective mass (kg) of the liquids used. TANK5) 6.12 %79. Two taps fill the water tank with different flow rates. Tap A fills the tank in 2 hour and tap B fills the tank in 8 hour. If we open two taps together, find the final temperature of the water in the tank. The temperature of the water from tap A is 10 oC, from tap B 50The motion of a liquid in an open tank is that of a combined vortex consisting of a forced vortex for 0 2 ft. The velocity profile and the corresponding shape of the free surface are shown in Fig. 6 . The free surface at the cen- ter of the tank is a depth h below the free surface at r = o. Deter- mine the value of h. Note that h = hforced + h&ce Where hforced and hfee are the corresponding depths for the forced vortex and the free vortex, respectively. 8-
- Condition State T > Tsat T < Tsat P > Psat P < Psat H > Hsat H < Hsat Fill in the table by determining if the state of the fluids is compressed liquid or saturated vapor at the given conditions.1-Dry saturated steam enters a steam nozzle at pressure of 12 bars and is discharged to a pressure of 1.5 bars. If the dryness fraction of a discharged steam is 0.95 what will be the final velocity of steam? Neglect initial velocity of steam. If 12% of the heat drop is lost in friction, find the percentage reduction in the final velocity.4. air in an internal combustion engine has 227 degrees Celcius, 1000 kPa, with a volume of 0.1 cubic meter. combustion heats it to 1800 K in a constant volume process. what is the mass of air, how high does the pressure become? 5. a rigid tank of 1 cubic meter contains nitrogen gas at 600 kPa, 400 K. by mistake, someone lets 0.5 kg flow out. if the final temperature is 375 K, what is the final pressure? 6. water in a piston/cylinder is at 90 degree celcius, 100 kPa, and the piston loading is such that pressure is proportional to volume, p=CV, where C is constant. heat is now added until the temperature reached 200 degree celcius. find the final pressure.
- 1.1 Determine the electrical power supplied to a boiler when the temperature of the entering water is 20 C and the exiting temperature is 89 C. The flow of.the pressured water is 2 Kg/s. There is a negligible pressure drop through this boiler and it operates at a constant pressure of 3 bars. The specific heat is c = 4,370 J/(Kg K). There is a 1.5(105 ) W rate of heat loss from the boiler during this process to a surrounding at 293.2 k. Consider steady state conditions. Calculate the mass flowrate of fuel (natural gas, CH4) required to heat the water flow to the conditions of problem 1.1 if the electrical heating device is replaced with a gas fired boiler. The high heating value (HHV) of the fuel is 50.02 MJ/kg. Calculate the exergy destroyed in the process described by problem 1.4. The exergy of the fuel entering this process is 51.82 MJ/Kg. The dead state temperature is 293.2 K and pressure is 1 bar. The products of combustion leave this process at the dead state. I already figured…1.1 Determine the electrical power supplied to a boiler when the temperature of the entering water is 20 C and the exiting temperature is 89 C. The flow of.the pressured water is 2 Kg/s. There is a negligible pressure drop through this boiler and it operates at a constant pressure of 3 bars. The specific heat is c = 4,370 J/(Kg K). There is a 1.5(105 ) W rate of heat loss from the boiler during this process to a surrounding at 293.2 k. Consider steady state conditions. 1.2 Calculate the total rate of entropy production in Problem 1.1. 1.3 Calculate the total rate of exergy destruction (W) in Problem 1.1. The dead state temperature is 293.2 K and pressure is 1 bar. 1.4 Calculate the mass flowrate of fuel (natural gas, CH4) required to heat the water flow to the conditions of problem 1.1 if the electrical heating device is replaced with a gas fired boiler. The high heating value (HHV) of the fuel is 50.02 MJ/kg 1.6 The utility providing the electricity to the boiler in problem 1.1 uses…1.1 Determine the electrical power supplied to a boiler when the temperature of the entering water is 20 C and the exiting temperature is 89 C. The flow of.the pressured water is 2 Kg/s. There is a negligible pressure drop through this boiler and it operates at a constant pressure of 3 bars. The specific heat is c = 4,370 J/(Kg K). There is a 1.5(105 ) W rate of heat loss from the boiler during this process to a surrounding at 293.2 k. Consider steady state conditions. Calculate the mass flowrate of fuel (natural gas, CH4) required to heat the water flow to the conditions of problem 1.1 if the electrical heating device is replaced with a gas fired boiler. The high heating value (HHV) of the fuel is 50.02 MJ/kg. Calculate the exergy destroyed in the process described by problem 1.4. The exergy of the fuel entering this process is 51.82 MJ/Kg. The dead state temperature is 293.2 K and pressure is 1 bar. The products of combustion leave this process at the dead state. Asnwer: The…