Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 40, Problem 45SDP
To determine
Comment on the differences among the materials, design and the technique of processing and assembling methods used for making such products as ladder and hand tools for the consumer use as well as for professional use.
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Calculate ℛP.M. in Example 11.2.
Question 22: The superheated steam powers a steam turbine for the production of electrical power. The steam expands in the turbine and at an intermediate expansion pressure (0.1 MPa) a fraction is extracted for a regeneration process in a surface regenerator. The turbine has an efficiency of 90%.
It is requested:
Define the Power Plant Schematic
Analyze the steam power system considering the steam generator system in the attached figure
Determine the electrical power generated and the thermal efficiency of the plant
Perform an analysis on the power generated and thermal efficiency considering a variation in the steam fractions removed for regeneration
##Data:
The steam generator uses biomass from coconut shells to produce 4.5 tons/h of superheated steam;
The feedwater returns to the condenser at a temperature of 45°C (point A);
Monitoring of the operating conditions in the steam generator indicates that the products of combustion leave the system (point B) at a temperature of 500°C;…
This is an old practice exam question.
Chapter 40 Solutions
Manufacturing Engineering & Technology
Ch. 40 - Explain what is meant by manufacturing properties...Ch. 40 - Why is material substitution an important aspect...Ch. 40 - What factors are involved in the selection of...Ch. 40 - How is production quantity significant in...Ch. 40 - List and describe the major costs involved in...Ch. 40 - Why does material selection influence energy...Ch. 40 - Describe life-cycle assessment and life-cycle...Ch. 40 - Define what is meant by economic order quantity.Ch. 40 - Explain the difference between direct-labor cost...Ch. 40 - Describe your understanding of the following...
Ch. 40 - What is the difference between production...Ch. 40 - Is there a significant difference between...Ch. 40 - How would you define value? Explain.Ch. 40 - Define sustainable manufacturing.Ch. 40 - What is the meaning and significance of the term...Ch. 40 - Describe the major considerations involved in...Ch. 40 - What is meant by manufacturing process...Ch. 40 - Prob. 18QLPCh. 40 - Explain why the value of the scrap produced in...Ch. 40 - Prob. 20QLPCh. 40 - Prob. 21QLPCh. 40 - Explain why it takes different amounts of energy...Ch. 40 - Refer to Table 40.2 and explain why it is...Ch. 40 - Explain how the high cost of some of the...Ch. 40 - On the basis of the topics covered in this book,...Ch. 40 - What factors are involved in the shape of the...Ch. 40 - Describe the problems that may have to be faced...Ch. 40 - Prob. 28QLPCh. 40 - Prob. 29QLPCh. 40 - Prob. 30QLPCh. 40 - Prob. 31QLPCh. 40 - Review Table 40.2 and estimate the carbon...Ch. 40 - Explain why the larger the quantity per package...Ch. 40 - Prob. 34QLPCh. 40 - As you can see, Table 40.5 lists only metals and...Ch. 40 - Is it always desirable to purchase stock that is...Ch. 40 - Prob. 37SDPCh. 40 - Prob. 38SDPCh. 40 - Prob. 39SDPCh. 40 - Over the years, numerous consumer products (such...Ch. 40 - List and discuss the different manufacturing...Ch. 40 - Prob. 42SDPCh. 40 - Prob. 43SDPCh. 40 - Select three different products commonly found in...Ch. 40 - Prob. 45SDPCh. 40 - The cross-section of a jet engine is shown in Fig....Ch. 40 - Inspect some products around your home, and...Ch. 40 - Prob. 48SDPCh. 40 - Discuss the trade-offs involved in selecting...Ch. 40 - Discuss the factors that influence the choice...Ch. 40 - Prob. 52SDPCh. 40 - Figure P40.53 shows a sheet-metal part made of...Ch. 40 - The part shown in Fig. P40.54 is a carbon-steel...
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- Steam enters the high-pressure turbine of a steam power plant that operates on the ideal reheat Rankine cycle at 700 psia and 900°F and leaves as saturated vapor. Steam is then reheated to 800°F before it expands to a pressure of 1 psia. Heat is transferred to the steam in the boiler at a rate of 6 × 104 Btu/s. Steam is cooled in the condenser by the cooling water from a nearby river, which enters the condenser at 45°F. Use steam tables. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the pressure at which reheating takes place. Use steam tables. Find: The reheat pressure is psia. (P4)Find thermal efficiencyFind m dotarrow_forwardAir at T1 = 24°C, p1 = 1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 3 kg/min and mixes with a saturated moist air stream entering at T2 = 7°C, p2 = 1 bar. A single mixed stream exits at T3 = 17°C, p3 = 1 bar. Neglect kinetic and potential energy effects Determine mass flow rate of the moist air entering at state 2, in kg/min Determine the relative humidity of the exiting stream. Determine the rate of entropy production, in kJ/min.Karrow_forwardAir at T1 = 24°C, p1 = 1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 3 kg/min and mixes with a saturated moist air stream entering at T2 = 7°C, p2 = 1 bar. A single mixed stream exits at T3 = 17°C, p3 = 1 bar. Neglect kinetic and potential energy effects Determine mass flow rate of the moist air entering at state 2, in kg/min Determine the relative humidity of the exiting stream. Determine the rate of entropy production, in kJ/min.Karrow_forward
- Air at T1 = 24°C, p1 = 1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 3 kg/min and mixes with a saturated moist air stream entering at T2 = 7°C, p2 = 1 bar. A single mixed stream exits at T3 = 17°C, p3 = 1 bar. Neglect kinetic and potential energy effects (a) Determine mass flow rate of the moist air entering at state 2, in kg/min (b) Determine the relative humidity of the exiting stream. (c) Determine the rate of entropy production, in kJ/min.Karrow_forwardA simple ideal Brayton cycle operates with air with minimum and maximum temperatures of 27°C and 727°C. It is designed so that the maximum cycle pressure is 2000 kPa and the minimum cycle pressure is 100 kPa. The isentropic efficiencies of the turbine and compressor are 91% and 80%, respectively, and there is a 50 kPa pressure drop across the combustion chamber. Determine the net work produced per unit mass of air each time this cycle is executed and the cycle’s thermal efficiency. Use constant specific heats at room temperature. The properties of air at room temperature are cp = 1.005 kJ/kg·K and k = 1.4. The fluid flow through the cycle is in a clockwise direction from point 1 to 4. Heat Q sub in is given to a component between points 2 and 3 of the cycle. Heat Q sub out is given out by a component between points 1 and 4. An arrow from the turbine labeled as W sub net points to the right. The net work produced per unit mass of air is kJ/kg. The thermal efficiency is %.arrow_forwardSteam enters the high-pressure turbine of a steam power plant that operates on the ideal reheat Rankine cycle at 700 psia and 900°F and leaves as saturated vapor. Steam is then reheated to 800°F before it expands to a pressure of 1 psia. Heat is transferred to the steam in the boiler at a rate of 6 × 104 Btu/s. Steam is cooled in the condenser by the cooling water from a nearby river, which enters the condenser at 45°F. Use steam tables. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the pressure at which reheating takes place. Use steam tables. The reheat pressure is psia.Find thermal efficieny Find m dotarrow_forward
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- A reservoir at 300 ft elevation has a 6-in.-diameter discharge pipe located 50 ft below the surface. The pipe is 600 ft long and drops in elevation to 150 ft where the flow discharges to the atmosphere. The pipe is made of riveted steel with a roughness height of 0.005 ft. Determine the flow rate without a head loss Determine the flow rate with the pipe friction head loss. (hints: Since the velocity is not known for part b and the Reynolds number and friction factor depend on velocity, you will need to iterate to find the solution. A good first guess is the velocity from part (a))arrow_forwardAir at T₁-24°C, p₁-1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 3 kg/min and mixes with a saturated moist air stream entering at T₂-7°C, p2-1 bar. A single mixed stream exits at T3-17°C, p3-1 bar. Neglect kinetic and potential energy effects Step 1 Your answer is correct. Determine mass flow rate of the moist air entering at state 2, in kg/min. m2 = 2.1 Hint kg/min Using multiple attempts will impact your score. 5% score reduction after attempt 2 Step 2 Determine the relative humidity of the exiting stream. Փ3 = i % Attempts: 1 of 3 usedarrow_forward25 mm Brass core E = 105 GPa 0 = 20.9 x 10 °C PROBLEM 2.49 The aluminum shell is fully bonded to the brass core and the assembly is unstressed at a temperature of 15°C. Considering only axial deformations, determine the stress in the aluminum when the temperature reaches 195°C. 60 mm Aluminum shell E = 70 GPa a = 23.6 × 10°Carrow_forward
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