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computer science
systems analysis design

Questions and Answers of Systems Analysis Design

A company has data that indicates the annual expenditures on a robotics manufacturing line are uniform at $100 per unit produced for the first four years. This cost has shown to increase by $50 per
The WMHX (We Make Heat Exchangers) company has created an investment plan to fund the next generation heat exchanger they plan to develop. The plan calls for an initial investment of $7 million,
A company that manufactures food-grade oil is considering a proposal to construct a large tank to store raw, unrefined oil. This will permit the company to buy raw oil at a more favorable price and
In a paper mill, a new conveyor system is being considered to move the freshly chipped wood to the next stage in the production line. The cost of the new conveyor is $55,250. Yearly operating and
Two different labeling machines are being considered for a canned food processing plant. Machine X has a first cost of $46,500, a service life of 5 years and a salvage value of $5,000. The annual
Solve Problem 2.19 using an annual cost analysis instead of a present worth analysis.Problem 2.19Two different labeling machines are being considered for a canned food processing plant. Machine X has
A pipeline engineer is considering alternative natural gas pipeline routings. The first route is mostly over land and the second is primarily undersea. Both pipelines will need some valve and fitting
Solve Problem 2.21 using an annual cost analysis instead of a present worth analysis.Problem 2.21A pipeline engineer is considering alternative natural gas pipeline routings. The first route is
The Automated Assembly Company is considering three different methods for assembly of parts in a production line. Method 1 has an initial cost of $40,000, an annual cost of $9,000, and a two-year
Solve Problem 2.23 using an AC analysis instead of a PW analysis.Problem 2.23The Automated Assembly Company is considering three different methods for assembly of parts in a production line. Method 1
A nominal 36-inch pipeline can be installed for $216,600. The annual cost of the 36-inch pipeline including pump operating costs and maintenance is estimated to be $48,600. A nominal 30-inch pipeline
Two engines are being considered for a power delivery of 500 hp. Engine A has an initial cost of $15,700 while engine B costs $22,500. The specific fuel consumption rate of each engine is 0.42
A railroad track runs down a street of a manufacturing complex and the freight cars frequently halt all movement on another company street which crosses it.The traffic holdup adds up to an hour each
A company has a need for compressed air in one of its factory operations. A compressor has been selected for this task. The company is now considering three options to drive the compressor. These
Three alternatives are being considered for an air cleaning system. All three systems have a life of 10 years with no salvage value. System A has an initial cost of $29,000. During the first five
Conduct a parametric study of the economic selection problem given in Problem 2.29. Plot the annual cost of systems A, B, and C as a function of the MARR for the range 0 ≤ MARR ≤ 25%. Discuss the
Two heat treating systems are being considered for a metal forming process.System A has an initial cost of $121,400 with annual costs of $8,000. After the first year an additional $1,000 of
Two injection molding systems are being considered for a production line. Use of an injection molding system will reduce the manual time spent on the production line which increases annual profits.
A company is converting a mostly manual assembly line to a completely automated, robotic assembly line. A bid package is written asking potential vendors to propose the costs required to automate the
The annual profit realized from a production line in a manufacturing company is $250,000. Annual depreciation, based on the straight-line model, is determined to be $125,000. The company’s tax rate
The annual income received from a production line in a manufacturing company is $1 million. The annual operating cost for the production line are $150,000 and the annual maintenance cost is $50,000.
A company has purchased a piece of equipment for $300,000. Tax codes indicate that the service life of this piece of equipment is 8 years with a salvage value of $50,000 at the end of the service
The initial cost of a machine for a production facility is $225,000. The machine is expected to last for 10 years with no salvage value. The company’s tax rate is 49%and SLD is used to depreciate
An empirical expression that is sometimes used to estimate the base cost of ashell and tube heat exchanger is (Corripio, Chrien, and Evans 1982),In this equation, cHX is the heat exchanger cost in
Solve Problem 2.5 including the effect of taxes and depreciation. For tax purposes, the economic life and salvage value are the same as given in Problem 2.5.The pipeline equipment is depreciated
Solve Problem 2.5 including the effect of taxes and depreciation. For tax purposes, the economic life and salvage value are the same as given in Problem 2.5. The pipeline equipment is depreciated
Solve Problem 2.18 including the effect of taxes and depreciation. Tax regulations indicate that the economic life of the conveyor is 20 years with a salvage value of $4,000. The conveyor system is
Solve Problem 2.18 including the effect of taxes and depreciation. Tax regulations indicate that the economic life of the conveyor is 20 years with a salvage value of $4,000. The conveyor system is
The open water tank shown in Figure P3.1 is filled through Pipe 1 with a velocity of 7 ft/s and through Pipe 3 at a volumetric flow rate of 0.2 ft3/s.a. Determine the velocity through Pipe 2
Water enters the rigid, covered tank shown in Figure P3.2 with a volumetric flow rate of 0.32 L/s. The water line has an inside diameter of 6.3 cm. The air vent on the tank has an inside diameter of
Refrigerant 134a enters a tube in the evaporator of a refrigeration system at 132.73 kPa and a quality of 0.15 at a velocity of 0.5 m/s. The R134a exits the tube as a saturated vapor at −21°C. The
A pressurized propane tank is fitted with a valve on top that allows saturated vapor to escape when the valve is opened. When the valve is first opened, the mass flow rate of the propane leaving the
Water enters a tank through a 10-cm diameter pipe at a velocity of 3 m/s, as shown in Figure P3.5. At the bottom of the tank, water exits at 6 m/s through a 5.25-cm diameter pipe. The depth of the
Refrigeration systems incorporate an expansion process between the condenser and evaporator. Consider the case where Refrigerant 134a enters an expansion valve as a saturated liquid at 65°C with a
Air enters the adiabatic nozzle of a turbojet engine at 230 kPa, 600°C with a velocity of 60 m/s as shown in Figure P3.7. At the nozzle exit, the air is at 70 kPa, 450°C.The dead state is 100 kPa,
An industrial facility needs a flow of 100 gpm of hot water at 180°F, 50 psia.Two designs are being considered to make the hot water as shown in Figure P3.8. In Design 1, the hot water is produced
Dry atmospheric air enters an adiabatic compressor at a 20°C, 1 atm and a mass flow rate of 0.3 kg/s. The air is compressed to 1 MPa. The exhaust temperature of the air is 70 degrees hotter compared
A flash tank is a common component found in refrigeration systems. A refrigerant enters the flash tank as a wet mixture. The saturated liquid portion of the flow is drawn off at the bottom of the
Two streams of dry air come together and mix in an insulated mixing box. One of the air flows enters the mixing box at 60°F with a volumetric flow rate of 400 cfm.The second stream enters the mixing
Dry atmospheric air (70°F, 1 atm) enters a compressor at a flow rate of 120 lbm/h.The inlet pipe on the compressor has an inside diameter of 0.5 inch. The air leaves the compressor at 175 psia,
A pump is being used to move a liquid 30% ethylene glycol-water solution. The pump is connected to a pipe system as shown in Figure P3.13. The pressure on the suction side of the pump is 70 kPa. The
A counter flow heat exchanger is being used to cool a flow of cyclohexane from 110°C to 62°C. The cyclohexane enters the heat exchanger at a flow rate of 14 L/s.The cyclohexane is cooled by water
A household refrigerator-freezer sold in the U.S. has a refrigeration capacity of 0.14 ton. The Energy Star label on the refrigerator indicates that it has an EER of 10.8.Determine,a. The power draw
A steam power plant has an instantaneous net power delivery of 462 MW with a heat rate of 11,827 Btu/kWh. For this operating condition determine,a. The boiler heat transfer rate (MBtu/hr)b. The
The initial stages of a power plant design involve analyzing the plant from a cyclic perspective. Consider a steam cycle power plant with a net power output of 1000 MW and an estimated thermal
A heat pump is operating between a low temperature reservoir of 270 K and a high temperature reservoir of 340 K. The heat pump receives heat at 255 K from the low temperature reservoir and rejects
An engineer wishing to live off the grid has devised a scheme for heating a residence.The system is a small engine that directly drives a heat pump. This system is shown schematically in Figure
Show that the COPC and the COPH of a refrigeration cycle are related by the following expression,Start with a sketch of the refrigeration cycle as shown in Figure 3.10 to develop your solution. COPH
A refrigeration cycle is operating as a heat pump. The source temperature is at the dead state, T0, and the sink is at TH. Show that the exergetic efficiency of this heat pump cycle can be written
Steam leaves the boiler of a power plant at 5 MPa, 500°C as shown in Figure P3.22. As the steam passes to the turbine, the temperature drops to 496°C before it enters the turbine due to a heat loss
A two-stage air compressor with inter-stage cooling is shown in Figure P3.23. The dry air enters the first compressor stage at 1 atm, 25°C, a volumetric flow rate of 3500 cfm, and is compressed to 5
Consider the two-stage air compressor with inter-stage cooling described in Problem 3.23. For this thermal system determine the following,a. The exergy destruction rate in each component (kW)b. The
An industrial furnace used to heat treat carbon steel is shown in Figure P3.25A.The carbon steel stock (cps = 0.12 Btu/lbm-R) passes through the furnace at a rate of 13,200 lbm/h. The steel enters
Figure P3.26 shows a boiler and turbine from a coal-fired steam power plant. Water enters the boiler at 5 MPa, 100°C at a mass flow rate of 400 kg/s. Steam leaves the boiler at 5 MPa, 650°C. The
In the manufacture of paper, large amounts of electricity, process steam, and hot water are required. While these three needs could be met by individual thermal energy systems, it is prudent to
Consider the gas turbine system analyzed in Section 3.10.3. The system is modified to include a regenerator as shown in Figure P3.28. The regenerator is a counter flow heat exchanger and has an
Refrigeration equipment is often installed with more cooling capacity than is needed. The best way to operate the equipment when the cooling load is lower than the capacity is to reduce the
A multistage vapor compression refrigeration system with flash gas removal is being used to maintain a cold space at TC = 20°F for frozen food storage as shown in Figure P3.30. The system utilizes
Consider an 8-nom commercial steel pipe carrying dodecane at 60°F. The volumetric flow rate of the dodecane is 800 gpm. Complete Table P4.1 showing the variation of the dodecane flow parameters
Liquid Refrigerant 123 (R123) at 120°C is passing through a ½-std copper tube at a flow rate of 1200 kg/hr. Complete Table P4.2 showing the variation of the R-123 flow parameters inside the tube as
Refrigerant R134a is flowing through a ¾-std type L copper tube in a refrigeration system. In this system, a desuperheater is used to heat water as shown in Figure P4.3. The R134a enters the
Compressed air at 500 kPa, 90°C is flowing through a 4-nom sch 40 commercial steel pipe at a volumetric flow rate of 375 m3/h. Determine the friction factor for this flow.
In a particular section of a fluid system, a 30% ethylene glycol mixture is flowing through a 6-nom xs cast iron pipe at a temperature of 0°C. In this section of piping, the velocity must be
A 10-nom sch 40 horizontal commercial steel pipe is being used to transport octane. The pipe is 230 ft long. The octane is at 40°F and is flowing at 610 gpm.Determine the pressure drop of the octane
Liquid propane is flowing through a 4 std type L copper tube. The tube is 200 m long and the outlet is 10 m higher than the inlet. The pressure drop through the tube is 90 kPa. The cyclohexane is at
Water is flowing through a 2½-nom xs cast iron pipe at a rate of 4 L/s. The pipe is 75 m long and its outlet is 6 m higher than the inlet. The water is at a temperature of 25°C. Determine the
A 20% ethylene glycol solution is flowing through a 4-nom sch 80 commercial steel pipe. The pipe is 350 ft long and is horizontal. The pressure drop through the pipe is 4 psi. The ethylene glycol is
A fuel line supplying fuel to several large industrial diesel engines is made of type M copper tube. The tube is 40 ft long. The fuel is dispensed by gravity feed from a tank that is 12 ft above the
A horizontal pipeline is used to transport ethanol (ethyl alcohol) at 20°C over a distance of 3 km. The pipe is made of commercial steel. The required flow rate of the ethanol is 40 L/s. The pump
The Alaskan pipeline runs 798 miles from Prudhoe Bay to Valdez. Both cities are at sea level. The design specifications for the pipeline require a capacity of 2.4 million barrels per day (1 barrel =
Fluid flow can cause excessive wear on the inside surface of a pipe, resulting in a much rougher surface over time. This increased surface roughness results in a larger pressure drop which requires
A standard 90° elbow is being used in a 8-nom commercial steel pipe. The joint between the pipe and elbow is flanged. Under a fully turbulent flow condition, the loss coefficient for the elbow is
Solve Problem 4.14 using the 3K method for calculating the K value of the elbow.Problem 4.14A standard 90° elbow is being used in a 8-nom commercial steel pipe. The joint between the pipe and elbow
A piping system is made of 10-nom sch 80 commercial steel pipe. The pipe is transporting a 30% propylene glycol solution at a temperature of 40°C. Table P4.16 shows the number of fittings and valves
The design of a pump and pipe system has been completed, except for the valves.The system is used to transport water at 120°F through 2 nom sch 40 commercial steel pipe at a required flow rate of 85
A ½-std type M copper tube system used to make a heat exchanger has 32 180° standard bends. The joints are soldered (assume this joint type can be treated as a welded joint). The fluid flowing
Air is passing through a round duct with an inside diameter of 2 ft in an air conditioning system. The air is at a temperature of 60°F and a pressure of 1 atm.The air is flowing at a rate of 5000
A tilting disc check valve is to be installed in a 4-nom sch 40 steel pipeline.For the valve being considered, the angle α = 5°. The fluid being transported through the pipeline is a 20% ethylene
Water at 80°C is flowing in a 6-nom sch 120 commercial steel pipe at a flow rate of 21 L/s. A globe-type lift check valve is to be installed in this pipe.a. Specify the size and ASME class of the
A 6-nom class 400 wye fitting with equal leg diameters has 650 gpm of water flowing into the fitting at 60°F. 65% of the flow leaves the fitting through the straight run and the remaining flow
Hexane enters the branch portion of a tee at 6 L/s and the straight run portion at 10 L/s. The tee is a 3-nom class 300 fitting. All ports of the tee have the same diameter. Determine the head loss
A gravity-feed piping system between two large tanks is used to transport a 20%magnesium chloride solution as shown in Figure P4.24. The magnesium chloride solution is at 80°F and the tanks are open
Figure P4.25 shows a pump and pipe network being used to transport heptane at 120°F to a large, elevated, closed storage tank. The tank is pressurized and maintained at 18 psia. The volumetric flow
Water at 80°C is being pumped to a large reservoir 8.5 m above the discharge of the pump. The pipe network transporting the water is shown in Figure P4.26.The volumetric flow rate of the water is 10
A 15% calcium chloride solution at −5°C is being delivered from a large refrigerated storage tank with the gravity-feed pipe network shown in Figure P4.27. A 30° tapered reducer is used to reduce
A large elevated tank (Tank 1) is being used to supply water at 60°F to two tanks at a lower elevation (Tanks 2 and 3) as shown in Figure P4.28. All pipes are 5-nom sch 40 commercial steel. The
In order to properly size the fan required for a heating and air conditioning system, the pressure drop in the system must be determined. Consider the air distribution system shown in Figure P4.29.
A pump is being used to deliver water at 70°F to two large, elevated tanks as shown in Figure P4.30. The pump is delivering a volumetric flow rate of 275 gpm.The pipes from A to B and B to C are
A commercial steel pipe is being designed to transport liquid benzene at 185°F to a heat exchanger at a flow rate of 850 gpm. The fittings, valves, supports, and pump are estimated to cost 6 times
A commercial steel class 300 schedule 40 pipe is being used to transport 1000 gpm of liquid cyclohexane at 70°F. The fittings, valves, supports, and pump are estimated to cost 6.9 times the
A Bell & Gossett Series e-1531 model 5BD pump operating at 1770 rpm is being used to deliver 250 m3/h of a 10% methanol solution at 5°C through a pipe network.The impeller diameter is 8.5 inches.
A production facility has a fluid transport system for liquid dimethyl carbonate. The pipeline transporting the dimethyl carbonate is made of class 400 sch 80 commercial steel. The properties of
A centrifugal pump is being used to deliver 250 gpm of water at 60°F. The pump head is determined to be 25 ft and its efficiency is 70%. Determine the brake horsepower input to the pump and the
A centrifugal pump delivers 60 L/s of toluene at 40°C. The pump head is found to be 15 m and its efficiency is 48%. Determine the shaft power input to the pump (kW) and the power input to the
A centrifugal pump is being used to transport 440 gpm of benzene at 80°F. The suction pipe inlet to the pump is 6-nom sch 40 and the pump discharge pipe is 5-nom sch 40. Pressure gauges on the
A centrifugal pump is being used to transport 45 m3/h of a 20% ethylene glycol solution at 0°C. The suction pipe inlet to the pump is 2½-nom sch 40 and the pump discharge pipe is 2-nom sch 40.
Two pumps are being considered for a pipe system. Table P4.39 shows the economic and operating parameters of each pump. The fluid being transported in the system is a 30% propylene glycol solution.
A closed-loop pipe system similar to Figure 4.16 is being designed. At 280 gpm, the system curve indicates that the pump must deliver 120 ft. A 2.5x2.5x7B Bell & Gossett Series e-80 pump
Figure P4.41 shows a system curve overlaid on a set of Bell & Gossett Series e-1531 Model 4x4x7B at 3550 rpm pump curves. The flow requirement for the system is 150 m3/h.a. Specify the pump’s
A Bell & Gossett Series e-1531 end-suction pump is to be selected for the system shown in Figure P4.42. The system is designed to move water at 60°F from the lower tank to the upper tank. The

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