4.5 thermodynamics At steady state, a new power cycle is claimed by its inventor to develop net power at a rate of (a) 3.75 hp, (b) 4.29 hp for a heat additionrate of 300 Btu/min, while operating between hot and cold reservoirs at 2000°R and 500°R, respectively. Evaluate each claim.Part AWhat is the thermal efficiency for the conditions of case (a)? Is the inventor's claim possible for the conditions of case (a)?na = iThe claims is%

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Answered: At steady state, a new power cycle is…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Q2/ A power cycle operating between two reservoirs receives energy Qi by heat transfer from a hot reservoir at T 1000K and rejects energy Q2 by heat transfer to a cold reservoir at Tz-200K For each of the following cases, determine whether the cycle operates reversibly, irreversibly, or is impossible. (a) QI = 500KJ, W 350KJ (b) Q1 = 1000KJ, Q2 200KJ (c) W= 800KJ, Q2 = 500KJ (d) 7 = 95 % %3D %3D
Three sub steps of a thermodynamic cycle are employed in order to change the state of a gas from 1 bar, 1.5 cubic meter and internal energy of 512 kJ. The processes are: 1st step: Compression at constant PV to a pressure of 2 bar and internal energy of 690 kJ. 2nd step: A process where work transferred is zero and heat transferred is - 150 kJ. 3rd step: A process where work transferred is -50 kJ. without KE and PE changes, determine: a. heat transferred during 1st step (kJ) b. heat transferred during 3rd step (kJ)
Two kilograms of air within a piston-cylinder assembly execute a Carnot power cycle with maximum and minimum temperatures of 750 K and 300 K, respectively. The heat transfer to the air during the isothermal expansion is 60 kJ. At the end of the isothermal expansion the volume is 0.4 m³. Assuming the ideal gas model for the air, determine ) the work and heat transfer for each of the four processes, in kJ. ) Sketch the cycle on p-V coordinates.
An inventor claims to have developed a power cycle operating between hot and cold reservoirs at 1350 K and 295 K, respectively, that provides a steady-state power output of (a) 30.00 kW, (b) 33.33 kW, while receiving energy by heat transfer from the hot reservoir at the rate 150,000 kJ/h. Evaluate each claim. Part A What is the thermal efficiency for the conditions of case (a)? Is the inventor's claim possible for the conditions of case (a)? Na = i % The claims is Save for Later Attempts: 0 of 1 used Submit Answer Part B The parts of this question must be completed in order. This part will be available when you complete the part above.
A power cycle operates between hot and cold reservoirs at 900 K and 300 K, respectively. At steady state the cycle develops a power output of 0.38 MW while receiving energy by heat transfer from the hot reservoir at the rate of 1 MW.Determine the thermal efficiency and the rate at which energy is rejected by heat transfer to the cold reservoir, in MW for the following.(a) The power cycle and conditions above. Determine the thermal efficiency and the rate at which energy is rejected by heat transfer to the cold reservoir, in MW.(b) A reversible power cycle operating between the reservoirs and receiving the same rate of heat transfer from the hot reservoir as in part (a). Determine the thermal efficiency and the rate at which energy is rejected by heat transfer to the cold reservoir, in MW.
In one cycle, a heat engine absorbs 1.71 kJ from a hot reservoir at 277°C and expels 1.18 kJ to a cold reservoir at 27°C. (a) What is the engine's thermal efficiency (in percent)? % (b) How much work is done by the engine (in J) in each cycle? (c) What is the engine's power output (in kW) if each cycle lasts 0.302 s? kW Need Help? Read It
An inventor claims to have developed a power cycle operating between hot and cold reservoirs at 1175 K and 295 K, respectively, that provides a steady-state power output of (a) 27.27 kW, (b) 30.00 kW, while receiving energy by heat transfer from the hot reservoir at the rate 150,000 kJ/h. Evaluate each claim. Part A What is the thermal efficiency for the conditions of case (a)? Is the inventor's claim possible for the conditions of case (a)?
A power cycle operates between two thermal reservoirs at 1200 K and 400 K, respectively. For each of the three cases below, determine: (i) The net power produced by the cycle, in kW; (ii) The thermal efficiency; and (iii) Use the Clausius inequality and comparisons to the thermal efficiency of a reversible cycle operating between the given temperatures to determine whether the cycle operates in a reversible or irreversible manner, or is impossible. case | QH(kJ/s) | QL(kJ/s) A | 600 | 400 B | 600 | 0 C | 600 | 200
An air conditioner operating at steady state maintains a dwelling at 20 C on a day when the outside temperature is 35 C. Energy is removed by heat transfer from the dwelling at a rate of 2800 J/s while the air conditioner's power input is 0.8 kw. (a) Determine the coefficient of performance of the air conditioner. (b) Determine the power input required if it was a Carnot refrigerator. English (United States) 目 98%
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2. A power cycle receives energy QH by heat transfer from a hot reservoir at TH = 1200 R and rejects energy QC by heat transfer to a cold reservoir at TC = 400 R. For each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. (a) QH = 900 Btu, Wcycle = 450 Btu (b) QH = 900 Btu, QC = 300 Btu (c) Wcycle = 600 Btu, QC = 400 Btu (d) Eff. = 70%
On the basis of the first law fill in the blank spaces in the following table of imaginary heat engine cycles. On the basis of the second law classify each cycle as reversible, irreversible, or impossible. Cycle Temperature Rate of Heat Flow Rate of Efficiency work Source Sink Supply Rejection Оutput ...kW 327°C 27°C 420 kJ/s 230 kJ/s (a) (b) (c) (d) ... kW 26 kW 1 kW 1000°C 100°C ...kJ/min 4.2 MJ/min 65% ...kJ/s 2500 kcal/h 750 K 300 K ...kJ/s 65% 700 K 300 K ..kcal/h

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At steady state, a new power cycle is claimed by its inventor to develop net power at a rate of (a) 3.75 hp, (b) 4.29 hp for a heat addition rate of 300 Btu/min, while operating between hot and cold reservoirs at 2000°R and 500°R, respectively. Evaluate each claim.