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Conference Article: Using Transfer Function Method To Study The Dynamic Circulation Characteristics of HTR-10GT

Shutang Zhu, Jie Wang, Zhioyong Huang, Suyuan Yu, Institute of Nuclear and New Energy Technology, Beijing, CHINA

Abstract

The High Temperature gas-cooling Reactor (HTR) has been studied and one 10MW example plant, called HTR-10, has been established at Institute of Nuclear and New Energy Technology (INET) of Tsinghua University. Based on the successful operation of HTR-10, INET set up the direct gas turbine circle project, HTR-10GT. The turbo-machine consisting of turbine, compressors and generator will be installed in the existing structure of HTR-10. With the limitation of geometry, some ordinary control and regulation measures for the operation of turbo-machine can not be implemented. How to ensure the turbo-machine to operate with the reactor circulation in a high rotation speed (15000rpm) becomes the crux of the project. In the present study, a Transfer Function Method (TFM) is employed to investigate the dynamic circulation characteristics of the HTR-10GT. The closed circulation can be separated into a series of functional parts: the reactor, the helium turbine, the recuperator, the pre-cooler, the low-pressure compressor, the inter-cooler, the high-pressure compressor and connecting pipes. For each functional part, a transfer function can be defined to describe its hydrodynamic and thermodynamic response characteristics, which seems to be a “black-box” and can be calibrated by the experimental results (or empirical curves). The complete circulation can be taken as a convolution of transfer functions of all these functional parts. Using such a methodology, the hydrodynamic and thermodynamic circulation characteristics of HTR-10GT can be thoroughly studied and a suite of techniques to operate and manipulate the first HTR direct gas turbine cycle of the world can be set up. The results of investigations can be used in the practical operation of the HTR-10GT.

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key words: Brayton Cycle, Dynamic System, HTR-10GT, Laplace transform, Transfer Function Method
Reference:
Proceedings of the Conference on High Temperature Reactors, Beijing, China, September, 22-24, 2004
International Atomic Energy Agency, Vienna (Austria)
HTR-2004, pp:1-9