The power-plant will have 380 MWe electric power.
The proposed gas-vapor cycle is different from traditionallyused ones. It
consists of closed gas turbine cycle (instead of open gas turbinecycle used
commonly). The working fluid is helium and the cycle consists of acompressor, a
heater, a turbine and a cooler. The cooler acts as heat recoverysteam generator
(HRSG) for steam cycle. Other components of cycle are turbinecondenser and
pump. The condition at inlet to compressor is to be taken as 750kPa, 60oC. The
compressor pressure ratio is 4.0 and the maximum turbine inlettemperature is
900oC. Steam leaves the HRSG at 1 MPa and 300oC. The condenserpressure is 10
kPa. Assume pressure loss across heater, HRSG, condenser andconnecting piping
to be negligible. Also, assume hundred percent efficiency for allcomponent.
Calculate the mass flow rate of helium and steam required toprovide the desired
power output, the cycle efficiency, and the cycle heat rate. Alsoestimate the exergy
destruction for this cycle. The environmental conditions are 100kPa and 30oC.
Estimate pinch-point temperature difference? Is this cyclefeasible?
