A dual-pressure combined-cycle power plant consists of a gas turbine, HRSG, and steam turbine plant. The gas turbine exhaust gas flow rate is 590 kg/s, temperature is 608°C, HP superheated steam condition is 140 bars and 550°C temperature, LP saturated steam is at 8 bar, condenser pressure is 0.05 bar, and feedwater temperature is 120°C. Assuming a pinch 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 steam turbine of 0.9, calculate (a) the total steam production rate of the HRSG in kg/s, (b) the HRSG heat transfer rate in kJ/s, (c) the stack gas temperature in °C, and
A dual-pressure combined-cycle power plant consists of a gas turbine, HRSG, and steam turbine plant. The gas turbine exhaust gas flow rate is 590 kg/s, temperature is 608°C, HP superheated steam condition is 140 bars and 550°C temperature, LP saturated steam is at 8 bar, condenser pressure is 0.05 bar, and feedwater temperature is 120°C. Assuming a pinch 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 steam turbine of 0.9, calculate (a) the total steam production rate of the HRSG in kg/s, (b) the HRSG heat transfer rate in kJ/s, (c) the stack gas temperature in °C, and
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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A dual-pressure combined-cycle power plant consists of a gas turbine,
HRSG, and steam turbine plant. The gas turbine exhaust gas flow rate is
590 kg/s, temperature is 608°C, HP superheated steam condition is 140
bars and 550°C temperature, LP saturated steam is at 8 bar, condenser
pressure is 0.05 bar, and feedwater temperature is 120°C. Assuming a
pinch 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 steam
turbine of 0.9, calculate (a) the total steam production rate of the HRSG in
kg/s, (b) the HRSG heat transfer rate in kJ/s, (c) the stack gas temperature
in °C, and (d) the steam turbine power output in kW.
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