2.4 Calculate the thermal efficiency of the plant.
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- Steam enters the turbine of a power plant operating on the Rankine cycle (Fig. 2) at 873.15 Kand exhausts at 30 kPa. To show the effect of boiler pressure on the performance of the cycle,calculate the thermal efficiency of the cycle and the quality of the exhaust steam from theturbine for boiler pressures of 5000,7500, and 10 000 kPa. #Chemical Engineering #Chemical #ThermodynamicsProblem 1: The boiler of a power steam cycle operates at 6000 kPa and the condenser at 50 kPa. At the entrance to the turbine, the temperature is 500°C. The isentropic efficiency of the turbine is 90 percent, pressure and pump losses are negligible, and the water leaving the condenser is subcooled by 6.3°C. The boiler is sized for a mass flow rate of 18 kg/s. You are asked to: a. Represent the cycle on P-v and T-s diagrams. b. Compute the rate at which heat is added in the boiler. c. Compute the power required to operate the pumps. d. Determine the net power produced by the cycle. e. Compute the thermal efficiency.A closed-cycle gas turbine plant consists of a compressor, a heat exchanger, a heater, a two-stage turbine with reheater, and a cooler. The maximum and minimum pressures and temperature in the cycle are 30 bar and 570oC, and 7.5 bar and 15oC. The pressure in the reheater is 15 bar. Sketch the layout of the plant and indicate pressures and temperaturesbetween the components if (a) the heat exchanger is used, (b) the heat exchanger by-passed.Calculate the ideal cycle efficiencies and work ratios in both cases. The gas used in the circuit is helium, which has a molar mass of 4 kg/kmol and cp=1.5 R
- NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. The gas-turbine cycle of a combined gas–steam power plant has a pressure ratio of 8. Air enters the compressor at 290 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 15 MPa to 450°C in a heat exchanger. The combustion gases leave the heat exchanger at 247°C. Steam expands in a high-pressure turbine to a pressure of 3 MPa and is reheated in the combustion chamber to 500°C before it expands in a low-pressure turbine to 10 kPa. The mass flow rate of steam is 12 kg/s. Assume isentropic efficiencies of 100 percent for the pump, 85 percent for the compressor, and 90 percent for the gas and steam turbines. A.) Determine the mass flow rate of air in the gas-turbine cycle. Use steam tables and the table containing the ideal-gas properties of air. The mass flow rate of air in the gas-turbine cycle is ___?___kg/s…Steam enters the turbine of a simple vapor power plant with a pressure of 10 MPa and temperature T, and expands adiabatically to 6 kPa. The isentropic turbine efficiency is 85%. The saturated liquid exits the condenser at 6 kPa and the isentropic pump efficiency is 82%. (a) For T = 580°C, determine the turbine exit quality and the cycle thermal efficiency. (b) Plot the quantities of part (a) versus T ranging from 580 to 700°C.Note: Please produce a concise, workable solution that includes all of the necessary details and explanations. Thank you so much; if the wish is fulfilled, I'll hit "like" right away.A gas turbine power plant operates on a simple thermodynamic cycle. The ambient conditions are 100 kPa and 24 °C. The air at this condition enters the engine at 150 m whose diameter is 0.5 m. The pressure ratio across the compressor is 13, and the temperature at the turbine inlet is 1400 K. Assuming ideal operation for all components and specific heats for air and products separately. In addition, neglect the mass of fuel burned. Do the followings: d. Determine the pressure and the temperature at the turbine exit, e. Compute the power produced by the turbine f. Available specific work g. The thermal efficiency.
- An Otto cycle uses air as its working fluid. The compression ratio of the cycle is 10. 1,800 kJ/kg of heat is added during the heat addition process. If the temperature and pressure at the end of compression are 444C and 2,168Kpa. Assume constant specific heats for the analysis, determine (a) the temperature and pressure at the end of each process, (b) the thermal efficiency of the process (c) the net Work of the cycle (d)mean effective pressure of the cycle.A power plant uses a gas turbine to produce electricity. Assume that the gas-turbine operates on the ideal Brayton cycle has a pressure ratio of 8. The outside air temperature is 27 C and without preheating, the air is drawn into the compressor. The air compressed in the compressor and its pressure and temperature increase. Thereafter it is supplied into the combustion chamber where its temperature increases to 1023 C at constant pressure. Thereafter, hot air is drawn into the turbine. By considering the air-standard assumptions, determine (a) the gas temperature at the exits of the compressor and the turbine (b) the back work ratio (c) the thermal efficiencyA power plant uses a gas turbine to produce electricity. Assume that the gas-turbine operates on the ideal Brayton cycle has a pressure ratio of 8. The outside air temperature is 27 °C and without preheating, the air is drawn into the compressor. The air compressed in the compressor and its pressure and temperature increase. Thereafter it is supplied into the combustion chamber where its temperature increases to 1023 °C at constant pressure. Thereafter, hot air is drawn into the turbine. By considering the air-standard assumptions, determine (a) the gas temperature at the exits of the compressor and the turbine (b) the back work ratio (c) the thermal efficiency
- Which of the following are true for the limitations and impracticalities of the turbine of the Carnot vapour cycle? a. Difficulty in designing a compressor that handles two phases. b. Limitation of the thermal efficiencies due to operation temperature. c. Difficulty in accomplishing a working fluid in a single phase at a high temperature. d. Limitation in reaching a suitable maximum temperature. e. Difficulty in controlling the condensation process to desired quality at pump inlet. f. Incident of wear and corrosion on device blades. g. The challenge of device that can handle steam with high moisture content.A power plant uses a gas-turbine to produce electricity. Assume that the gas-turbine operates on the ideal Brayton cycle has a pressure ratio of 8. The outside air temperature is 27 C and without preheating, the air is drawn into the compressor. The air compressed in the compressor and its pressure and temperature increase. Thereafter it is supplied into the combustion chamber where its temperature increases to 1023 C at constant pressure. Thereafter, hot air is drawn into the turbine. By considering the air-standard assumptions, determine (a) the gas temperature at the exits of the compressor and the turbine (b) the back work ratio (c) the thermal efficiencyA gas turbine power plant working on Brayton cycle as per the following specifications.Pressure and temperature of air at inlet to compressor = 1 bar and 10oCPower output of the plant = 14 MW Temperature at inlet to the turbine = 760oC Pressure ratio = 12Isentropic efficiency of compressor = 100% Isentropic efficiency of turbine = 80% Determine the following:(i) Pressure and temperatures at all the points of the cycle; (ii) Cycle efficiency;