Analysis of a Vapor Power Plant
8/20/96
ME1361 Thermo II
3.0 Â Â Â Â Â Â Â Â Abstract
The objective of this make is to construct a computer model of a wet vapor power plant. This model will be use to calculate the state properties at all points within the cycle. include is an digest of the ideal extraction pressures based on the mensurable values of net work, energy input, thermal efficiency, moisture content, and effectiveness.
4.0 Â Â Â Â Â Â Â Â Body
4.1 Â Â Â Â Â Â Â Â Introduction
System to be Analyzed
Steam enters the first turbine set at 120 bar, 520 °C and expands in three stages to the condenser pressure of .06 bar. Between the first and befriend stage, some steam is diverted to a closed feedwater fume at P1, with saturated liquid condensate being manage ahead into the boiler feedwater line. The Terminal Temperature Difference of the feedwater heater is 5°C. The rest of the steam is reheated to 500°C, and then enters the second stage of expansion. Part of the steam is extracted between the second and third stages at P2 and fed into an open feedwater heater operating at that pressure. gross(a) liquid at P2 leaves the open feedwater heater. The efficiencies of all pumps are 80%, and the efficiencies of all turbines are 85%.
Throughout this report the states will be referenced as depicted in a higher place with the numbers 1-13.
The analysis of the system will involve the use of the Energy put Balance to isolate the specific enthalpies and associated values of temperature, pressure, specific volume, and steam quality. The Entropy balance equation will be use to calculate the specific entropy at all the above noted states.
Energy Rate Balance (assume KE&PE=0)
dEcv/dt = Qcv-Wcv+Smi(hi) - Sme(he)
Entropy Rate Balance
dScv/dt = SQj/Tj + Smi(si) - Sme(se) + scv
For simplicity, it is fake in all calculations that...
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