Author:
Guan Yin,Li Wen,Zhu Yangli,Wang Xing,Zhang Yifeng,Chen Haisheng
Abstract
Abstract
The air storage pressure of compressed air energy storage system gradually decreases during the process of energy release, and a reasonable air distribution method for the turbine is required to make the turbine work efficiently in this process. In this paper, based on the single nozzle governing method, the effect of the variation of the full circumferential relative stator installation angle on the system performance improvement under the rated output work condition is investigated. It is shown that the specific work of the variable relative stator installation angle can be improved by up to 6.3 % relative to the design stator installation angle and up to 15.7 % relative to the throttle governing method under the base pressure of 10.0 MPa. With the same absence of throttling losses, the specific work of 3-nozzle inlets method is higher than that of 4-nozzle inlets method, and the turbine internal losses are reduced by 10.6 %. This study provides a theoretical basis for the design, optimization and operation control of nozzle governing turbines.
Reference35 articles.
1. Technical principle of CAES system;Chen;J Energy Storage Science and Technology,2013
2. Thermo-Economic Modeling and Evaluation of Physical Energy Storage in Power System;Hu;J Therm Sci,2021
3. Research on Varying Condition Characteristic of Steam Turbine Governing Stage Based on Dimensional Analysis;Ma;Proceedings of the CSEE,2013
4. The spacing of turbo-machine blading, especially with large angular deflection;Zweifel;Brown Boveri Rev,1945