Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Chapter 13, Problem 9R
What problems can a high-feed roller pressure cause?
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Consider the combined gas-steam power cycle. The topping cycle is a gas-turbine cycle that has a pressure
ratio of 8. Air enters the compressor at 300 K and the turbine at 1300 K. The isentropic efficiency of the
compressor is 80%, and that of the gas turbine is 85%. The bottoming cycle is a simple Rankine cycle
operating between the pressure limits of 7 MPa and 5 kPa. Steam is heated in a heat exchanger by the
exhaust gases to a temperature of 500°C and the isentropic efficiency of the turbine is 90 %. The exhaust
gases leave the heat exchanger at 450 K. Considering the mass flow rate steam as 1 kg/s, determine:
A) Net power, B) Total input heat, C) Total entropy generation, D) Energy efficiency, E) Exergy efficiency,
F) T-s diagram
Solve by EES
Compressor
Air -③
in
Exhaust
gases
Pump
Combustion
chamber
Gas
turbine
Gas cycle
Heat exchanger
Condenser
Steam
Steam
turbine
cycle
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Chapter 13 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 13 - Why is it important to make sure that an FCA...Ch. 13 - What major safety concerns should an FCA welder be...Ch. 13 - Why should the FCA welding practice plates be...Ch. 13 - Why should the FCA welds be of substantial length?Ch. 13 - What must be done to a shielding gas cylinder...Ch. 13 - What can happen to the wire if the conduit is...Ch. 13 - Why is it a good idea for a new student welder to...Ch. 13 - Why is the curl in the wire end straightened out?Ch. 13 - What problems can a high-feed roller pressure...Ch. 13 - Referring to Table 13-1, answer the following a....
Ch. 13 - What are the disadvantages of beveling plates for...Ch. 13 - What is the maximum plate thickness that an FCS...Ch. 13 - What is the smallest V-groove angle that can be...Ch. 13 - What is the purpose of the root pass?Ch. 13 - Why is the FCA welding process not used for...Ch. 13 - Why should convex weld faces be avoided?Ch. 13 - What bead pattern is best for overhead welds?Ch. 13 - Why is the appearance of the cover pass so...Ch. 13 - What are the visual inspection standard's...Ch. 13 - Why is the backing strip 2 in. (50 mm) longer than...Ch. 13 - Why should there be a space between the plates...Ch. 13 - What would a small notch at the root weld's...Ch. 13 - What changes should be made in the setup for...Ch. 13 - What problem must be overcome if the amperage and...Ch. 13 - How can higher welding speeds help control...Ch. 13 - How can spatter buildup on the welding gun be...
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