Hi guys, im going to come clean i've been set this as a working at home question but from the notes i have i cant make head or tail of any of it! any help or pushes in the right direction would be greatly appreciated.
Steam ar 40 bar and 400C enters the high pressure turbine of a steam power plant at a rate of 20kg/s and explands to a pressure of 3 bar at which point it is just dry saturated. at this point part of the steam is re heated to 400C and then expands in the low pressure turbine to a condenser pressure of 0.05 bar with an isentropic efficiency of 88%. the remainder passes directly to asingle 'open' feed heater. the water leaving the condenser is raised to the feed heater pressure which it enters at a temp of 50C
1) Draw a schematic diagram of the plant and a corredponding cycle diagram on a temperature-entropy axes
2) neglecting feed pump work inputs, find:
a) the mass flow rates of steam and water entering the feed heater
the plnats power output and heat input
c) the plants thermal efficiency
Thank you for looking!