10. Carnot cycle thermal efficiency is increased by reducing lower(sink) temperature 11. A system with higher exergy has more capacity to do work than a system with lower exergy. 12. A diffuser has low pressure at inlet and high pressure at outlet 13. Carnot efficiency equation can also be used to find efficiency of conversion of electrical and/or magnetic energy to work. 14. Quality factor of 0.75 indicates supersaturated vapor 15. Law of conservation of Mass and energy applied to Nozzles and Diffusers indicates that under ideal conditions, the change in kinetic energy of the fluid results in a complimentary change in enthalpy of the fluid

10. Carnot cycle thermal efficiency is increased by reducing lower(sink) temperature 11. A system with higher exergy has more capacity to do work than a system with lower exergy. 12. A diffuser has low pressure at inlet and high pressure at outlet 13. Carnot efficiency equation can also be used to find efficiency of conversion of electrical and/or magnetic energy to work. 14. Quality factor of 0.75 indicates supersaturated vapor 15. Law of conservation of Mass and energy applied to Nozzles and Diffusers indicates that under ideal conditions, the change in kinetic energy of the fluid results in a complimentary change in enthalpy of the fluid

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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Air enters the compressor of a simple gas turbine at 14.5 lbf/in.2, 80°F, and exits at 87 lbf/in.2, 514°F. The air enters the turbine at 1540°F, 87 lbf/in.2 and expands to 917°F, 14.5 lbf/in.2 The compressor and turbine operate adiabatically, and kinetic and potential energy effects are negligible. On the basis of an air-standard analysis, a. develop a full accounting of the net exergy increase of the air passing through the gas turbine combustor, in Btu/lb. b. devise and evaluate an exergetic efficiency for the gas turbine cycle. Let T0 = 80°F, p0 = 14.5 lbf/in.2
Determine for the cycle: (a) the mass flow rate of steam entering the first stage of the turbine, in lb/h. (b) the rate of exergy input, in Btu/h, to the working fluid passing through the steam generator. (c) the magnitude of the exergy output, in Btu/h, of the net power output. (d) the magnitude of the exergy loss in the condenser, in Btu/h. (e) the exergy destroyed in the tubine, in Btu/h. (f) the exergy destroyed in the open feedwater heater, in Btu/h.
Exergy flow associated with a fluid stream when the fluid properties are variable can be determined by.
Air enters the compressor of a simple gas turbine at 14.5 lbf/in.2, 80°F, and exits at 87 lbf/in.2, 514°F. The air enters the turbine at 1540°F, 87 lbf/in.2 and expands to 917°F, 14.5 lbf/in.2 The compressor and turbine operate adiabatically, and kinetic and potential energy effects are negligible. On the basis of an air-standard analysis, develop a full accounting of the net exergy increase of the air passing through the gas turbine combustor, in Btu/lb. devise and evaluate an exergetic efficiency for the gas turbine cycle. Let T0 = 80°F, p0 = 14.5 lbf/in.2
Exergy of a Flow Stream: Flow (or Stream) Exergy.
12. determine: a. the mass flow rate of steam entering the first stage of the turbine, in lb/h b. the rate of energy input, in Btu/h, to the working fluid passing through the steam generator. c. the magnitude of the exergy output, in Btu/h, of the net power output. d. the magnitude of the energy loss in the condenser, in Btu/h e. the exergy destroyed in the turbine, in Btu/h f. the exergy destroyed in the open feedwater heater, in Btu/h.
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