A turbine receives steam at 100 bar, 600°C and exhausts it at 2 bar from which it is used for process heating; AP and AK are negligible (a) For ideal Rankine engine, determine work (kJ/kg) steam rate (kg/hr), thermal efficiency and mean effective pressure. (b) For the actual engine, the brake efficiency is 84%; the driven generator efficiency is 93% and the rated output of the generator is 30 MW. Estimate the enthalpy h₂' and quality (or superheated) of the exhaust. Compute the combined work (kJ/kg), combined heat rate (kJ/kWh), and the total steam flow for the rated power (kg/hr). h2 = 505 kJ/kg P₂= 2 bar P₁ = 100 bar T₁ = 600°C T₂ = 120.2°C

A turbine receives steam at 100 bar, 600°C and exhausts it at 2 bar from which it is used for process heating; AP and AK are negligible (a) For ideal Rankine engine, determine work (kJ/kg) steam rate (kg/hr), thermal efficiency and mean effective pressure. (b) For the actual engine, the brake efficiency is 84%; the driven generator efficiency is 93% and the rated output of the generator is 30 MW. Estimate the enthalpy h₂' and quality (or superheated) of the exhaust. Compute the combined work (kJ/kg), combined heat rate (kJ/kWh), and the total steam flow for the rated power (kg/hr). h2 = 505 kJ/kg P₂= 2 bar P₁ = 100 bar T₁ = 600°C T₂ = 120.2°C

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

See similar textbooks

Similar questions

An ideal Diesel engine operates on 0.63 lbm of air with a suction state at 14 psia and 140-F. The pressure at the end of compression is 458 psia and the volume at the end of heat addition process is 0.13 cubic ft. Using air properties (R=53.34 ft-lbf/lbm-R, k=1.4, Cp = 0.24, Cv=0.1714 Btu/lbm-R), determine compression ratio, percentage clearance, Qa, Qr, Thermal Efficiency, mean effective pressure. kindly show complete solutions
A dual-pressure combined-cycle power plant consists of a gas turbine,HRSG, and steam turbine plant. The gas turbine exhaust gas flow rate is590 kg/s, temperature is 608°C, HP superheated steam condition is 140bars and 550°C temperature, LP saturated steam is at 8 bar, condenserpressure is 0.05 bar, and feedwater temperature is 120°C. Assuming apinch point of 11 K for both high and low pressure, an exhaust gas specific heat of 1.05 kJ/(kg K), and an isentropic efficiency of the steamturbine of 0.9, calculate (a) the total steam production rate of the HRSG inkg/s, (b) the HRSG heat transfer rate in kJ/s, (c) the stack gas temperaturein °C, and (d) the steam turbine power output in kW.
A 350-MW simple-cycle gas turbine power plant operates with a compressor pressure ratio of 16, TIT of 1450°C and compressor intake temperature of 10°C, and pressure of 1 bar. The fuel natural gas with an LHV of 50 MJ/kg is burned in a gas turbine combustor. The compressor and turbine isentropic efficiencies are 0.87 and 0.92, respectively. Calculate (a) the plant net specific work, (b) the compressor airflow.
A 136 kg/s steam with an inlet condition of 52 bar, 400 C enters a rankine turbine and expands to 36 kPa. determine the work, the thermal efficiency, and the steam rate (a) for the cycle, (b) for the turbine. (c) With the same specifications, consider the steam expanded on an actual turbine and the brake steam rate is 4800 g/kwh and the driven electric generator has an efficiency of 0.93. Find Brake Thermal Eff, Brake Engine Eff, Combined Work, and quality or temperature of actual exhaust steam
A Carnot power cycle has a high temperature of 1500 K and a low temperature of 500 K.The pressure at the bottom right of the cycle on a TS diagram (state 3) is 200 kPa and 600kPa at the bottom left (state 4). The fluid inside is air and can be treated as an ideal gas (cp =1.005 kJ/kg). Determinea. The pressure at the beginning (state 1) and end of the isothermal expansion(state 2), each in kPa.b. The heat transfer and work, in kJ/kg for each process.c. The thermal efficiency.
A Rankine Engine-Generator unit receives 27,000 kg/hr of steam at 1.2 MPa and 150°C and exhausts to a condenser temperature of 22 C. Brake steam rate is 4.74 kg/kW-hr, mechanical efficiency is 90 % and generator efficiency is 94 %. Determine: a) ideal cycle thermal efficiency, b) indicated engine efficiency, c) generator output (kW), d)the condition of turbine actual exhaust
Air enters the compressor of an ideal Brayton refrigeration cycle at 100 kPa, 300 K, with a volumetric flow rate of 0.90 m3/s, and is compressed to 430 kPa. The temperature at the turbine inlet is 330 K. Determine: (a) The net power input, in kW (b) The refrigerating capacity, in kW. (c) The coefficient of performance. (d) The coefficient of performance of a reversible refrigeration cycle operating between reservoirs at TC = 300 K and TH = 330 K.
Q1/ Ideal reheat cycle, has the following specifications: Boiler pressure is 200 bar and Condenser pressure is 0.22 bar and Reheat pressure is 60 bar , Turbine inlet temperature is 500 C and Reheat temperature 480 C Calculate: quality at turbine exist, thermal efficiency, and steam rate.
In a gas turbine plant working on air standard Brayton cycle, the air at inlet is at 27°C temperature ,0.1 MPa pressure respectively.The pressure is 6.25 and maximum temperature is 800° C the turbine and compressor efficiencies are each 80%. Find per kg of air; i) The compressor work ii)The turbine work iii) The cycle efficiency iv) The turbine exhaust temperature
Steam with 136 kg/s at 5.0 Mpa, 420oC expands in a Rankine turbine to 0.036546 Mpa.a) For Rankine cycle, determine the heat added, heat rejected, turbine work, pump workand cycle efficiency.b) For Rankine engine, determine the heat added, net work, and engine efficiency.(Note: Draw the schematic and T-s diagram)
Air enters the compressor of an ideal air-standard Brayton cycle at 100 kPa, 27 °C, with a volumetric flow rate of 5 m3/s. The compressor pressure ratio is 5. The turbine inlet temperature is 1127 °C. Assume cold-air analysis, determine the net power developed of the cycle. determine the thermal efficiency of the cycle. Determine the heat rejected to the condenser, in kW, determine the back work ratio. determine the input heat into combustor, in kW.
A 350-MW simple-cycle gas turbine power plant operates with a compressor pressure ratio of 16, TIT of 1450°C and compressor intake temperature of 10°C, and pressure of 1 bar. The fuel natural gas with an LHV of 50 MJ/kg is burned in a gas turbine combustor. The compressor and turbine isentropic efficiencies are 0.87 and 0.92, respectively. Calculate (a) the plant net specific work, (b) the compressor airflow, (c) the fuel consumption rate, (d) the turbine exit temperature, and (e) the plant thermal efficiency.