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Zhao X.,University of Shanghai for Science and Technology | Yu M.,University of Shanghai for Science and Technology | Long S.-D.,Shanghai Faiveley Traffic Equipment Co. | Xu J.-Y.,University of Shanghai for Science and Technology
Shanghai Ligong Daxue Xuebao/Journal of University of Shanghai for Science and Technology | Year: 2013

When locomotive runs through tunnels in summer, the cooling system's capacity is reduced, and leads to the temperature rise of cooling water. If the temperature reaches to the settled one, the locomotive will stop working. A spray cooling equipment was designed to solve the problem. Some numerical simulation was carried out and the temperature distribution was obtained. The results illustrate the improvement on the cooling system's capacity. Source


Cui M.-L.,University of Shanghai for Science and Technology | Yu M.,University of Shanghai for Science and Technology | Long S.-D.,Shanghai Faiveley Traffic Equipment Co. | Chen B.,University of Shanghai for Science and Technology
Shanghai Ligong Daxue Xuebao/Journal of University of Shanghai for Science and Technology | Year: 2014

The negative pressure on the surface of high-speed train reduces cooling air volume successively. The average negative pressure value and cooling air volume were obtained by numerical simulations at different speeds. The results show that the negative pressure in high-speed conditions impacts the running of condenser fan. Larger condenser fan was chosen, frequency conversion technique was used, and a PID control method taking condensation temperature as feedback signal was established. The power consumption was compared between variable frequency operation and constant frequency operation at different speeds. It is concluded that the frequency conversion condenser fan has good energy saving effect and load adaptability at low speed. The conclusions provide technical basis for the application of frequency conversion condenser fan to high-speed train. ©, 2014, Shanghai Institute of Mechanical Engineering. All right reserved. Source


Wang X.,University of Shanghai for Science and Technology | Yu M.,University of Shanghai for Science and Technology | Long S.,Shanghai Faiveley Traffic Equipment Co. | Cui M.,University of Shanghai for Science and Technology
Shanghai Ligong Daxue Xuebao/Journal of University of Shanghai for Science and Technology | Year: 2015

Under the environment of too high air temperature, the cooling effect of outdoor condenser of air-cooled conditioning units becomes poorer. In order to reduce the import air temperature and improve the condenser cooling condition, nozzles were installed to spray water to the condenser.The spray cooling of the condenser was numerically simulated by using CFD software and its effect on the outside environment air temperature field and the temperature distribution at different points under different water flow and different spray angle was analyzed.The simulation shows that the outside environment air temperature is reduced and along with the increase of spraying amount and spray angle, the temperature distribution at various points on the import wind section becomes more uniform. The condenser cooling ability is improved. ©, 2015, Shanghai Institute of Mechanical Engineering. All right reserved. Source


Chen J.-X.,University of Shanghai for Science and Technology | Yu M.,University of Shanghai for Science and Technology | Yao J.-H.,Shanghai Faiveley Traffic Equipment Co.
Shanghai Ligong Daxue Xuebao/Journal of University of Shanghai for Science and Technology | Year: 2012

A strategy for optimal design of train air-conditioning condenser (TACC) was developed using genetic algorithm (GA). According to different design requirements the weight or the volume of TACC was taken as an objective function and the dimensions of spacing and thickness of the fins as the optimization parameters. The optimization results show that the weight(volume) of TACC is reduced obviously and the heat transfer performance is improved. The design requirements of high performance and light weight can be satisfied, when the train speed is raised. Source


Yao J.-H.,Shanghai Faiveley Traffic Equipment Co. | Ma L.,University of Shanghai for Science and Technology | Xu J.-Y.,University of Shanghai for Science and Technology | Yu M.,University of Shanghai for Science and Technology
Shanghai Ligong Daxue Xuebao/Journal of University of Shanghai for Science and Technology | Year: 2012

With further improving the speed of high-speed train, the air flow on the train's surface is altered. The operation condition of its air-conditioning unit is also changed, which at last, will affect the performance of the air-conditioning unit. The air flows on the surface of high-speed train in different conditions were simulated by using the software of FLUENT. The distribution of the air pressare on the surface of high-speed train and the pressure values at its specific locations were obtained. The effects of raising the train speed on its air-conditioning unit's operation parameters, like the pressure of condenser fan, condensing air volume, condensing temperature and refrigeration coefficient were analysed. The conclusions provide certain theoretical basis for the optimization design of high-speed train's air-conditioning. Source

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