(a) Explanation Write the expresssion for the efficiency of reversible cycle. η R = T H − T c T H (I) Here, the reversible cycle efficiency or the maximum thermal efficiency of the cycle is η R , the temperature of the high temperature reservoir is T H and the temperature of the low temperature reservoir is T c . Write the expression for the efficiency of the power cycle. η = W c y c l e W c y c l e + Q c (II) Here, the work output of the cycle is W c y c l e , efficiecy of the power cycle is η and heat rejected to the atmosphere is Q c . Calculate the maximum cost for the power generated per year in Dollars. ( W c y c l e ) $ / y e a r = ( W c y c l e ) ( 10 3 kW 1 MW ) ( 8000 hr year ) ( $ 0 .1 year ) (III) Here, the value of power generated per year in dollar is ( W c y c l e ) $ / y e a r . Conclusion: Substitute 300 K for T c and 1000 K for T H in the Equation (I). η R = 1000 K − 300 K 1000 K = 700 1000 = 0.7 Since reversible power cycle is the only cycle that can develop the maxumum power in a temperature limit. The maximum power output is possible, when the efficiency of power cycle is equal to the reversible power cycle (b) To determine The fuel cost corresponding to the maximum power generation.

Fundamentals of Engineering Thermodynamics

8th Edition

ISBN: 9781118412930

Author: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey

Publisher: WILEY

See similar textbooks

Videos

Question

Chapter 5.11, Problem 40P

(a)

To determine

The maximum cost for the power generated.

(b)

To determine

The fuel cost corresponding to the maximum power generation.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 5.11, Problem 39P

Chapter 5.11, Problem 41P

Students have asked these similar questions

motor supplies 200 kW at 6 Hz to flange A of the shaft shown in Figure. Gear B transfers 125 W of power to operating machinery in the factory, and the remaining power in the shaft is mansferred by gear D. Shafts (1) and (2) are solid aluminum (G = 28 GPa) shafts that have the same diameter and an allowable shear stress of t= 40 MPa. Shaft (3) is a solid steel (G = 80 GPa) shaft with an allowable shear stress of t = 55 MPa. Determine: a) the minimum permissible diameter for aluminum shafts (1) and (2) b) the minimum permissible diameter for steel shaft (3). c) the rotation angle of gear D with respect to flange A if the shafts have the minimum permissible diameters as determined in (a) and (b).

First monthly exam Gas dynamics Third stage Q1/Water at 15° C flow through a 300 mm diameter riveted steel pipe, E-3 mm with a head loss of 6 m in 300 m length. Determine the flow rate in pipe. Use moody chart. Q2/ Assume a car's exhaust system can be approximated as 14 ft long and 0.125 ft-diameter cast-iron pipe ( = 0.00085 ft) with the equivalent of (6) regular 90° flanged elbows (KL = 0.3) and a muffler. The muffler acts as a resistor with a loss coefficient of KL= 8.5. Determine the pressure at the beginning of the exhaust system (pl) if the flowrate is 0.10 cfs, and the exhaust has the same properties as air.(p = 1.74 × 10-3 slug/ft³, u= 4.7 x 10-7 lb.s/ft²) Use moody chart (1) MIDAS Kel=0.3 Q3/Liquid ammonia at -20°C is flowing through a 30 m long section of a 5 mm diameter copper tube(e = 1.5 × 10-6 m) at a rate of 0.15 kg/s. Determine the pressure drop and the head losses. .μ= 2.36 × 10-4 kg/m.s)p = 665.1 kg/m³

2/Y Y+1 2Cp Q1/ Show that Cda Az x P1 mactual Cdf Af R/T₁ 2pf(P1-P2-zxgxpf) Q2/ A simple jet carburetor has to supply 5 Kg of air per minute. The air is at a pressure of 1.013 bar and a temperature of 27 °C. Calculate the throat diameter of the choke for air flow velocity of 90 m/sec. Take velocity coefficient to be 0.8. Assume isentropic flow and the flow to be compressible. Quiz/ Determine the air-fuel ratio supplied at 5000 m altitude by a carburetor which is adjusted to give an air-fuel ratio of 14:1 at sea level where air temperature is 27 °C and pressure is 1.013 bar. The temperature of air decreases with altitude as given by the expression The air pressure decreases with altitude as per relation h = 19200 log10 (1.013), where P is in bar. State any assumptions made. t = ts P 0.0065h

Chapter 5 Solutions

Fundamentals of Engineering Thermodynamics

Ch. 5.11 - Prob. 1E Ch. 5.11 - 2. Are health risks associated with consuming...Ch. 5.11 - Prob. 3E Ch. 5.11 - Prob. 4E Ch. 5.11 - Prob. 5E Ch. 5.11 - 6. Does the second law impose performance limits...Ch. 5.11 - Prob. 7E Ch. 5.11 - 8. What is delaying the appearance in new car...Ch. 5.11 - Prob. 9E Ch. 5.11 - 10. How significant is the roughness at a pipe’s...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.