Analysis On Gas Turbine Cycle With High Temperature Gas-cooled Reactor And Transient Performance Of Reactor

As one of the six advanced reactors of the fourth generation nuclear power plant, high temperature gas-cooled reactor (HTGR) is a potential reactor with bright perspectives. It has high safety, versatility and low emission. HTGR can be combined with a gas turbine to be gas turbine cycle with HTGR. This cycle can make use of high temperature(750-950℃) gas heated by HTGR to generate electricity with high efficiency. Because it breaks through the temperature limit of steam cycle and incorporates the inter-cooling and recuperating, so the gas turbine cycle with HTGR is expected to be a competing candidate for future concepts of high efficiency power generation.The main points of this thesis are as follows:The thermal and physical properties of helium, nitrogen, carbon dioxide and their mixtures were compared. What's more, the heat transfer coefficient, pressure loss and the stage number of turbo-machines in the gas turbine cycle with HTGR were analyzed.The performance of direct gas turbine with HTGR coupled with recuperating, inter-cooling and pre-cooling process was investigated. Firstly, the thermal efficiency of gas turbine with HTGR with helium, nitrogen, carbon dioxide and their mixtures as the working fluid was compared. Then, the influence of different parameters such as turbine inlet temperature, pressure loss coefficient and recuperation effectiveness on cycle efficiency was analyzed.Modular model of HTGR was established and created on the platform of MATLAB/Simulink. It can be used to investigate the transient performance of HTGR and also the gas turbine cycle with HTGR. For the validation of models, some typical conditions of step change were applied on the HTGR, and it gave a reasonable simulation result.This thesis can be functioned as the reference for working fluid choice of gas turbine cycle with HTGR and the fundamental research of design of HTGR and control system. It also can predict the dynamic characteristics of HTGR and make a good preparation for transient performance study of gas turbine cycle with HTGR.