8. (With regeneration and two-stage compression) Air enters the compressor of a Brayton cycle with regeneration at 100 kPa, 300K with a mass flow rate of 6 kg/s. The compressor pressure ratio is 10, and the turbine inlet temperature is 1400K. The pressure ratios across each compressor stage are equal. The intercooling is perfect. The turbine and compressor each have isentropic efficiencies of 80%. The regenerative effectiveness is 80%. Determine: (a) the thermal efficiency of the cycle (b) the back work ratio (c) the net power developed in kW

8. (With regeneration and two-stage compression) Air enters the compressor of a Brayton cycle with regeneration at 100 kPa, 300K with a mass flow rate of 6 kg/s. The compressor pressure ratio is 10, and the turbine inlet temperature is 1400K. The pressure ratios across each compressor stage are equal. The intercooling is perfect. The turbine and compressor each have isentropic efficiencies of 80%. The regenerative effectiveness is 80%. Determine: (a) the thermal efficiency of the cycle (b) the back work ratio (c) the net power developed in kW

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

32. Fine-grained materials have stress-hardening properties. a. True b. False
Question 4 a) Each cylinder in a four-cylinder car engine has a bore diameter of 63.53 mm and the stroke for each piston is 175.00 mm. Calculate the cubic capacity of the engine in cm? and calculate the clearance volume per cylinder for a compression ratio, r, of 6.25. b) The bore diameter of each cylinder in a six-cylinder four-stroke internal combustion engine is 32 mm and the stroke of each piston is 125 mm. During testing., the engine runs at 1450 revolutions per minute (rpm) with a pressure-volume indicator diagram showing a mean net area of 2.90 cm and a diagram length of 0.85 cm. The pressure scale on the indicator diagram is set to 165 kN/m per cm. Calculate the mean effective pressure (m.e.p) and the indicated power in kilowatts (kW) developed by this six-cylinder four-stroke engine. Give your answer to 2 decimal c) A hollow connecting rod has an inner diameter of 26.25 mm and is subjected to an axial tensile load of 500 MN. If the maximum allowable stress for this hollow rod…
A force stretches a wire by 4.0 mm. A third wire of the same material has the same length and twice the diameter as the first. How far will it be stretched by the same force? 4.0 mm 16 mm 8.0 mm 1.0 mm 2.0 mm
Power is supplied at the rate of 0.40 hp for 2 min in drilling a hole in a 1.0 lb brass block. (a) How much heat is generated? (b) What is the rise in temperature of the brass if 75% of the heat generated warms the brass? What happens to the other 25%? (don't change the hp, lb)
2) A washer is going to be manufactured by cutting operation out of 2024ST aluminum alloy sheet that has a thickness of 2.5 mm. The outside diameter of the washer is 25.0 mm, and the inside diameter is 12.0 mm. Make a rough sketch, define the geometries to be used and determine a. The punch and die size for the blanking operation b. The punch and die size for the punching operation c. The force required performing the blanking and punching operation simultaneously. The aluminum has a tensile strength = 300 MPa.
Manufacturing Processes Q1. Chose the correct answer: 1. Which of the following are variations of sheet-metal-bending operations: (a) coining, (b) flanging, (c) hemming, (d) ironing, (e) notching, (f) shear spinning, (g) trimming, and (h) tube bending? 2. Springback in a sheet-metal-bending operation is the result of which one of the following: (a) elastic modulus of the metal, (b) elastic recovery of the metal, (c) overbending, (d) overstraining, or (e) yield strength of the metal? 3. The cutting force in a sheet-metal blanking operation depends on which mechanical property of the metal (one correct answer): (a) compressive strength, (b) modulus of elasticity, (c) shear strength, (d) strain rate, (e) tensile strength, or (f) yield strength? 4. A circular sheet-metal slug produced in a hole punching operation will have the same diameter as (a) the die opening or (b) the punch? 5. As sheet-metal stock hardness increases in a blanking operation, the clearance between punch and die should…
Q1. What is sheet metal working? Write any four products made through the sheet metal processing. Explain in detail about the galvanized iron and stainless steel sheet metal materials.
Q2) Choose the correct answer for only 15 (fifteen) of the following. is about 67% of the total forces. A) Longitudinal force. 1) In turning operation, the force. E) thrust force. B) Radial C) feed force. D) cutting force. (C) 2) Which one of the following materials has the lowest hardness: (a) aluminum oxide, (b) cubic boron nitride, f) none of the previous answers. high-speed steel, (d) titanium carbide, or (e) tungsten carbide Which one of the following operations is generally capable of the closest tolerances: (a) broaching. (b) drilling, (c) end milling, (d) planning, or (e) shaping. F) none of the previous answers. 3)
4. State Hooke's law.