7.58 Figure PZ.58 shows a gas turbine power plant using air as the working fluid. The accompanying table gives steady-stateoperating data. Air can be modeled as an ideal gas. Stray heat transfer and the effects of motion and gravity can be ignoredLet To 290 K, po = 100 kPa. Determine, each in kJ per kg of air flowing, (a) the net power developed, (b) the net exergyincrease of the air passing through the heat exchanger, (eg- e), and (c) a full exergy accounting based on the exergysupplied to the plant found in part (b). Comment.State p(kPa) T(K) h(kJ/kg) s° (kJ/kg K)1100 290 290.161.6680500 505 508.1722.22973 500 875 904.992.81704 100 635 643.932.4688a o is the variable appearing in Eq. 6.20a and Table A-22.Heat exchangerCompressorTurbineFIGURE P7.58

(a) Since at the power plant both turbine and compressor are involved, write the expression for the…

Answered: 7.58 Figure PZ.58 shows a gas turbine…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Thermodynamics, please show all work. Step 1 and 2.
Air, modeled as an ideal gas, is compressed at steady state from 1 bar, 300 K, to 5 bar, 500 K, with 50 kW of power input. Heat transfer occurs at a rate of 6.667 kW from the air to cooling water circulating in a water jacket enclosing the compressor. Neglecting kinetic and potential energy effects, determine the mass flow rate of the air, in kg/s. m = i kg/s
Air, modeled as an ideal gas, is compressed at steady state from 1 bar, 300 K, to 5 bar, 500 K, with 120 kW of power input. Heat transfer occurs at a rate of 16 kW from the air to cooling water circulating in a water jacket enclosing the compressor. Neglecting kinetic and potential energy effects, determine the mass flow rate of the air, in kg/s. m = 0.8425 x kg/s
Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric flow rate of 39 m³/min and exits at 12 bar, 400 K. Heat transfer occurs at a rate of 6.5 kW from the compressor to its surroundings. Assuming the ideal gas model for air and neglecting kinetic and potential energy effects, determine the power input, in kW. Wcv = eTextbook and Media Save for Later kW Attempts: 0 of 5 used Submit Answer
Please solve by hand and correct answer please
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
Steam enters a counterflow heat exchanger operating at steady state at 0.07 MPa with a quality of 0.9 and exits at the same pressure as saturated liquid. The steam mass flow rate is 1.7 kg/min. A separate stream of air with a mass flow rate of 100 kg/min enters at 30°C and exits at 60°C. The ideal gas model with c, = 1.005 kJ/kg-K can be assumed for air. Kinetic and potential energy effects are negligible. Determine the temperature of the entering steam, in °C. For the overall heat exchanger as the control volume, what is the rate of heat transfer, in kW.
Steam expands adiabatically through a turbine at steady state. The entering stream is at 1000 lbf/in.², 1000°F, and the exiting stream is a saturated vapor at 10, lbf/in.². Kinetic and potential energy effects are negligible. a. [5] Sketch the process on a T-s diagram, including the liquid-vapor dome. b. [5] How much work per lb of flow does the turbine produce, in Btu/lbm? c. [5] If the turbine produces 5000 kW of output power, determine the mass flow rate of steam in kg/s. d. [5] If this process were isentropic, the existing stream would no longer be a saturated vapor. Determine the final quality of steam in that case. e. [10] Determine the isentropic turbine efficiency.
If heating from saturated liquid to saturated vapor would occur at 100°C (373.15 K), evaluate the exergy transfers accompanying heat transfer and work, each in kJ/kg. Ans. 484, 0.
Figure shows data for a portion of the ducting in ventilation system operating at steady state. The ducts are well insulated and the pressure is very nearly 1 bar throughout. Assuming the ideal gas model for air with Cp = 1 kJ/kg · K. and ignoring kinetic and potential energy effects, determine: (a) the temperature of the air at the exit, in °C. (b) the exit diameter, in m. (c) the rate of entropy production within the duct, in kJ/min.
7.66 Referring to the discussion of Sec. Z.6.2 as required, evaluate the exergetic efficiency for each of the following cases, assuming steady-state operation with negligible effects of heat transfer with the surroundings: a. Turbine: Wer 1200 hp, e 250 Btu//lb, eg = 15 Btu/lb, m 240 lb/min. b. Compressor: Wev/m=-105 kJ /kg, e = 5 kJ/kg, eg = 90 kJ/kg, m 2 kg /s. c. Counterflow heat exchanger: mh = 3 kg/s, me 10 kg /s, ef = 2100 kJ/kg, e = 300 kJ/kg, É = 3.4 MW 10 lb /s, m3 15 b /s, en = 1000 Btu/Ib, eg = 50 Btu/Ib, eg = 400 Btu/lb d. Direct contact heat exchanger: m1

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