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Facing the energy crisis and environmental problems, saving energy of hydraulic excavator is very important. This paper proposes a structure of hybrid hydraulic excavator as well as the control strategy. The system combines the advantages of STEAM system, IMV system and hydraulic transformer. The simulation is done by using AMESim software. From the simulation result, the proposed system can reduce...
In order to cut down air-condition energy consumption in the communication room and reduce the heat island effect partially, through the use of CFD (computational fluid dynamics), we have a study on airflow characteristics in communication engine-room. On the basis of established mathematical and physical equation about airflow characteristics, we try to get the numerical solution, and analyze the...
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