Cooling Characteristics and Performance of the 330MW Evaporative Cooling Turbo Generator
Guo Jianhong1, Gu Guobiao1, Fu Deping1, Huang Deshu2
1. Institute Electrical Engineering Chinese Academy of Sciences Beijing 100080 China 2. The Shanghai Turbo Generator Limited Company Shanghai 200240 China
Abstract：In our country, research and study on the evaporative cooling technology for the large scale generator has a history of more than 60 years. In recent years, the development of the evaporative cooling technology has moved out from the laboratory experiment to industrial and commercial application. In this article, the characteristics of the evaporative cooling technology are introduced, and then based on the 300MW evaporative cooling turbine generator as an example, the stator winding temperature field simulation based on the two-phase flow and heat transfer theory is provided; a 3D stator temperature field numerical calculation using the finite element method is conducted to provide the temperature distribution of the calculation region of the generator. Based on the simulation results a sample device was built for testing. According to the testing results the highest temperature rise of the motor stator winding immersed in the evaporative cooling medium is less than 42K, and the highest temperature rise in the core is less than 15K, far below the turbine generator cooling technical requirement. The testing results demonstrate that the evaporative cooling is feasible for the 300MW turbine generator, and comparison of the testing results with the simulation demonstrates the accuracy of the simulation and simulations feasibility for greater capacity power generator development.
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2013, Vol. 28 
