Simulation Research Of CRGT Cycle And Water System

With the excellent thermodynamic properties,including the large specific power output,the high thermal efficiency and the low emissions of NOx and so on,the CRGT cycle (Chemically recuperated gas turbine) has become one of the most important methods to solve the energy crisis and environmental problems at this stage.Base on our research ideas of the advanced cycle gas turbine plants (including STIG cycle, HAT cycle and combined cycle,etc),this thesis use the modular object-oriented modeling method to study the CRGT performance contrastively ,with the basis of one certain marine-turbine type.In this thesis,the following elements are completed:1)Use the VC Language to compile the thermodynamic calculation programs of the cycle medium's thermodynamic properties(including water and water vapor, dry air and wet gas);use the MEX interface to establish the dynamic link library between the VC software and Matlab software.2)Use the Matlab Language to compile the thermodynamic calculation programs of the advanced cycle components(including the gas turbine parts,chemi -cal recuperator and steam generator,etc)and the structural design process of the cross-flow type finned tube heat exchanger;use the BP neural network method to fit the components characteristic curves and compile its inquiry programs.3)Use the S function to build the Simulink block library of all programs. Based on this module library,carry out the advanced cycle's performance optimiza -tion and the dynamic simulation study.Through the simulation,the optimization rules of the advanced cycle water system (including CRGT cycle and STIG cycle),the variable load performance network diagrams (including the correlation of the output power and thermal efficiency ,with the quality of fuel injection and steam injection),and the control strategy of variable operating conditions (namely the fuel and steam supply rate's operate strategy,which made the turbine system operating quickly and safely between the off-design conditions) have been reached.