Abstract
The integrated gasification combined cycle (IGCC) is a power generation technology which combines clean coal technology with a combined cycle. The system modeling is significant for design, operation and maintenance of the IGCC power plant. However, the previous IGCC modeling methods only contained a simplified compartment gasifier model, which is useful to consider the heat transfer and chemical reaction inside the gasifier, but cannot analyze the pressure and flow distribution. In order to obtain a more accurate model of IGCC system, the volume-resistance technique and modular modeling method are utilized in this paper. The new model can depict the dynamic response and distribution characteristics of the gasifier, as well as their influence on the IGCC system. The simulation result of the gasifier and IGCC system shows an obvious delay after considering pressure and flow distribution. Therefore, the proposed IGCC system model can obtain a more reliable result when considering the distribution characteristics of the gasifier.
Highlights
Coal will continuously be a main energy source for worldwide power generation in the coming decades, especially in developing countries such as China and India [1,2]
Showing thatpaper, only homogeneous reactions and occurflow at this part. In this we focus on pressure distribution and its influence on the dynamic In In this paper, we focus flow distribution and its itsundergoes influenceon the dynamic this paper, we focuson onpressure pressure and flow when distribution and influence the dynamic performance of the gasifier
The results show that the gas turbine has the fastest response speed of all the components of integrated gasification combined cycle (IGCC) plant
Summary
Coal will continuously be a main energy source for worldwide power generation in the coming decades, especially in developing countries such as China and India [1,2]. Chui [5] discussed the simulation of entrained flow coal gasification of IGCC based on chemical reactions, and assumed that the pressure affecting the heterogeneous reactions was equal to the atmospheric value. Zhang [11] proposed another dynamic model for the gasifier of the IGCC power plant, using pressure-related coefficients to describe the heterogeneous reactions. Huang [15] utilized the volume-resistance characteristic method to describe the pressure and flow dynamic response of the gasifier but did not develop it into an IGCC system model. Since the volume inertias of the gasifier and other components have been considered in this model, the simulation can show a more convincing result for the system dynamic response of the IGCC power plant
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