UPVOTE WILL BE GIVEN FOR FAST ANSWERS WRITE LEGIBLY THANKS The data listed below are claimed for a power cycle operating between hot and cold reservoirs at1200 K and 300 K, respectively. For each case, determine whether the cycle operates reversibly,operates irreversibly, or is impossible. Write your answer in the space provided.Qu(kJ) Wcycle (KJ)Qc (kJ) Wcycle + Qcnthermal Wcycle / QH500450600800400400300500600150300130400200200Reversible,irreversible,impossible?

Answered: Image /qna-images/answer/b83dc840-d9d8-4514-bf68-5b512912bdbb.jpg

Answered: The data listed below are claimed for a…

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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Find the cycle entropy production and answer if it operates irreversibly, reverisbly, or impossibly. A system executes a power cycle while receiving 1000 kJ by heat transfer at a temperature of 500 K and discharging energy by heat transfer at 300 K. Determine the cycle entropy production if the cycle thermal efficiency is 25% in kJ / K. Enter the answer without units, but with a minus sign if applicable. This cycle operates irreversibly reversibly impossibly.
The Brayton cycle (1–2–3–4–1) can be modeled as a closed cycle with air (ideal gas with known constant properties) with a mass flow rate of m˙ B = 60 kg/s. The minimum and maximum pressures of the Brayton cycle are known and equal p B min = 0.3 MPa and p B max = 1.6 MPa, as well as the absorbed power Q˙H = 50 MW and the minimum temperature (T1 = 25ºC) of the cycle. Knowing that all processes occur in devices that operate in steady state, calculate the following parameters for each cycle: ( A ). The temperature at all points; ( B ). The compression and expansion power of each Brayton-Rankine cycle, as well as the absorbed/rejected heat transfer rate. ( C ). The efficiencies of each cycle, as well as the overall efficiency of the combined cycle (The combined cycle efficiency is calculated from the sum of the net work of the cycles under the heat supplied to the combined cycle). ( D ). The entropies generated from each process, as well as the total entropy for each cycle. General data: R…
Consider the following quantities for a reversible Carnot cycle: Step 1 q = 850 J, w = -434 J Step 2 q = 0 , w = -115 J Step 3 w = 72 J Step 4 q = 0, w = +115 J a) Calculate the efficiency of the cycle. b) If the initial temperature in step 1 is 25°C, what is the temperature at the end of step 2. c) If the number of moles of ideal gas involved in the cycle is 0.1 mol; calculate ΔH for step 4
Based on a gas turbine with superheat and intercooling, determine: 1) The thermal efficiency (ƞterm), in %. Use the expression ƞterm= 1 –(qL/ qH)2) How does gas turbine intercooling influence thermal efficiency?3) How and why? It is said that the gas turbine cycle with intercooling, reheating and regeneration is close to the Ericsson cycle.
Gaseous Methane actuates a Carnot power cycle in which the respective volumes at the four corners of the cycle,starting at the beginning of the isothermal expansion, are V1 = 10.10 L, V2 = 14.53 L, V3 = 226.54 L, and V4 157.73L. The cycle receives 21.1 kJ of heat. Determine a) the work and b) the mean effective pressure.
Show that the thermal efficiency of any internal combustion engine can besimplified as a ratio of temperature differences
Gaseous nitrogen actuates a Carnot power cycle in which the respective volumes at the four corners of the cycle starting at the beginning of the isothermal expansion are, V1 = 10.10 li, V2 = 14.53 li, V3 = 226.54 li, and V4 = 157.73 li. The cycle receives 21.5 kJ of heat. Determine (a) the net work, (b) the mean effective pressure, and (c) the thermal efficiency of the cycle.
Brayton cicle Based on a gas turbine with superheat and intercooling, determine: 1) The thermal efficiency (ƞterm), in %. Use the expression ƞterm= 1 –(qL/ qH)2) How does gas turbine intercooling influence thermal efficiency?3) How and why? It is said that the gas turbine cycle with intercooling, reheating and regeneration is close to the Ericsson cycle.
An ideal reversible heat engine operates between the temperatures of 1500°C and that of the environment at 27°C. If the efficiency of the machine is 20% and it receives 22 kJ, determine the entropy change of the environment. a) 58,637 J/Kb) 651,852 J/Kc) 293,187 J/Kd) 11,984 J/K
Qualitatively sketch and annotate the Stirling cycle on the following thermodynamicdiagrams. Be sure to indicate where the various steps (A, B, C, D) are taking place on the diagram.
In a constant volume ‘Otto cycle’, the pressure at the end of compression is 12 times that at the start, the temperature of air at the beginning of compression is 38°C and maximum temperature attained in the cycle is 1950°C. Determine the net work for the cycle in kJ/kg. cv = 0.716, k = 1.4, R = 0.287
Two reversible cycles operate between hot and cold reservoirs at temperatures TH and TC, respectively. (a)If one is a power cycle and the other is a refrigeration cycle, what is the relation between the coefficient of performance of the refrigeration cycle and the thermal efficiency of the power cycle? (b)If one is a refrigeration cycle and the other is a heat pump cycle, what is the relation between their coefficients of performance?

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