Bin Xiong

Developing of turbo generator based on evaporative cooling technique and analysis to key factors

Cooling technique is one of the most important parts to improve the development of turbo generator. From the earliest air cooling technique to the modern water and hydrogen cooling technique, turbo generator is optimized constantly. Evaporative cooling technique is the latest one utilized to cool turbo generator, and we believe that it ought to bring a great progress in improving the efficiency, reliability, security and economics of turbo generator. In this paper, we describe the applications of evaporative cooling technique to cool the electrically active components of generator and analysis to the key factors. The advanced cooling systems are outlined according to the capability of turbo generator, which will provide references for generator designers.

Research on heat transfer of spraying evaporative cooling technique for large electrical machine

A heat transfer calculation approach of spraying evaporative cooling is presented according to its characters using in large electrical machine. Based on the parameters of coolant, fluid and surface structure the calculation approach is confirmed, and gain the relationship between convective heat transfer coefficient and heat flux. Experiment model of spraying evaporative cooling electrical machine is built, and perform the heating and cooling experiment. The temperature distribution of experiment model is calculated by FEM taking the theoretical result of convective heat transfer coefficient as the boundary. The results of calculation and experiment are consistent, which shows that the boundary of calculation is suitable, and this method can be used in the calculation and design of spraying evaporative cooling electrical machine.

Data monitoring system for evaporative cooling ECR based on LabVIEW

The electron cyclotron resonance ion source magnet is a typical super-high power density magnet, and the evaporative cooling technology is an ideal cooling method for the coils of magnet. In order to ensure the evaporative cooling ECR data monitoring system safe and stable operation, this paper developed a data monitoring system. The system was developed by LabVIEW software based on the OPC technique. This system was designed according to the specific character of evaporative cooling ECR. It has the function such as real-time data acquiring, data display, data analysis, data processing and data storage.

Study of the gas-flow and heat-transfer in the wedge-shaped air gap of evaporation cooling turbo generator

Turbo generator with evaporative cooling stator and water cooling rotor possesses many excellent qualities for mid unit. The stator bars and core are immerged in evaporative coolant, which could be cooled fully. The rotor bars are cooled by water inner cooling mode. This paper presents the study of gas-flow and heat-transfer with different features in the turbo generator, and analyzing it by CFD. At last, the study provides foundation for the calculation of gas-flow and heat-transfer.

300MW level evaporative cooling turbine generator stator temperature field analysis

Evaporative cooling technology is an innovative technology developed in China, it is the first time the technology been used on the development of the 300MW level turbine generator, the technology features simplified structure and uniform distribution of temperature. In this article, based on the analysis of the heat radiation of the high capacity generator, we calculate the 3D temperature field of the hottest section of the turbine generator stator under steady state with the 3D finite element method, and provide the related radiation parameters for calculation of temperature rising with the radial heat hydrotubation process been taken into account. The calculated results was been compared with the measured values. Besides, we also provide the calculation and analysis under the overloaded situation of the generator operation, which will provide theoretical base for the development of high capacity evaporative cooling turbine generator.