The data listed below are claimed for a power cycle operating between hot and cold reservoirs at 1200 K and 400 K, respectively. For each case, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. a. Qh = 900 kJ, Weycle=450 kJ b. Qh = 900 kJ, Q. = 300 kJ eycle = 600 kJ, Q: = 400 kJ d. n= 75% 50% 66.7% c. W 60% %3D

The data listed below are claimed for a power cycle operating between hot and cold reservoirs at 1200 K and 400 K, respectively. For each case, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. a. Qh = 900 kJ, Weycle=450 kJ b. Qh = 900 kJ, Q. = 300 kJ eycle = 600 kJ, Q: = 400 kJ d. n= 75% 50% 66.7% c. W 60% %3D

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

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Hey! This is open space, remember to check your document properties and give all of your images alt text! power cycle receives QH by heat transfer from a hot reservoir at TH = 1200 K and rejects energy Qc by heat transfer to a cold reservoir at Tc = 400 K. For each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. a. QH = 900 kJ, Wcycle = 450 kJ b. QH = 900 kJ, QC = 300 kJ c. Wcycle = 600 kJ, QC = 400 kJ d. n = 75%
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Q2: A closed Gas turbine unit operating within below temperatures and pressures. Determine the heat supplied; the power output; work ratio; and the cycle efficiency. Compressor ti-20 °C Pi 1 bar mar = 5 kg/s P:= 7 bar t-760 °C Combustion chamber Cooler Turbine HOA W₁=?
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10. A thermodynamic cycle using water is shown on the T-s diagram of Figure 7.26. Calculate the coefficient of performance for this cycle using the equation h, – h, COP = (h, – he) – (h, – hɔ) State A State B State C State D X = 1.00 P = 300. psia X = 0.00 Po = 10.0 psia P = 10.0 psia The processes are A → B = isentropic compression, B → C = isobaric expansion, C →D= isentropic expansion, D - A = isothermal compression. FIGURE 7.26
3. A power cycle operating at steady state receives energy by heat transfer at a rate QH at TH = 1200 K and rejects energy by heat transfer to a cold reservoir at a rate Qc at Tc = 300 K. For each of the following, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. 400 kW, Weycle 250 kW, Qc = 200 kW a. %3D cycle 250 kW, Qc = 150 kW 400 kW, Qc b. C. = 100 kW
PART II: Gas turbine Introduction o Compressor (process 1 - 2) Work input, WC Increase pressure, pressure ratio p Wc = Win = mcp(T₂ - T₁) o Combustion of fuel (process 2 - 3) Heat addition, Qcc Increase temperature Qcc = Qin = m cp (T3 - T₂) o Expansion (process 3-4) High-energy fluid Useful Energy, WT WT = Wout = m Cp (T3 - T4) (1) Fuel Compressor Fresh air (2) Combustion chamber 3 Turbine Exhaust gases 4 w. net
1. Consider the following heat engines operating between 1200K and 300 K. For each case determine whether the heat engine operates reversibly, operates irreversibly, or is impossible. a. QH = 850 kJ, Qc = 300 kJ, Wnet = 550 kJ, %3| b. QH = 900 kJ, Qc = 400 kJ, Wnet = 550 kJ, %3D c. QH = 700 kJ, Qc = 140 kJ, Wnet = 560 kJ, d. QH = 800 kJ, Qc = 200 kJ, Wnet = 600 kJ.