1. Why is excessive moisture in steam undesirable in steam turbines? What is the highest moisture content allowed?

! Required information Consider an ideal gas-turbine cycle with two stages of compression and two stages of expansion. The pressure ratio across each stage of the compressor and turbine is 3. The air enters each stage of the compressor at 300 K and each stage of the turbine at 1200 K. Use variable specific heats. Determine the back work ratio and the thermal efficiency of the cycle, assuming a regenerator with 79 percent effectiveness is used. The back work ratio is The thermal efficiency is [ %. 1%.

Known: The data provided at the principal states of a thermal power plant. Assume an Ideal Rankine Cycle. (a) Explain about the general theory about the thermal power plant? (b) Formulate to determine the work done by the pump, and also formulate the work done by the turbine? (c) Evaluate the amount of heat supplied to the steam, and also determine the thermal efficiency of the cycle? Conditions: The steam enters into the turbine at a Pressure of 24 bar & 400°C and the exhaust steam is enter into the condenser at a pressure of 0.1 bar. Scheme and given data: Boiler 24 bar & 400°C Turbine 0.1 bar Condenser