Advanced Materials Research Vols. 608-609

Abstract: Electric vehicle (EV) has become one of the important development direction of the automobile industry generally recognized by the international community, as it has a good environmental effect and the flexible use form of energy. For the realization of the interaction between EV and grid, this paper studies and designs the interactive terminal to balance load and improve utilization of the grid. The terminal adopts high-end ARM platform and embedded Android operating system to realize both-way interaction of information and energy between EV and grid with means of communication such as CAN, 3G and Internet. Based on giving the design ideas of the intelligent terminal overall structure, this paper describes the hardware/software architecture technology, design methods and functions. The interactive terminal can deploy unified charging and discharging of EV according to the control mode of interaction, and give full play to the economic and social benefits of large-scale EV

Abstract: this paper establishes the revenue functions of both electric vehicle users(EV users) and power company, further analyzes users’ intention to reserve power and the feed-in tariff strategy of power company with CVaR criterion, for better V2G( vehicle to grid) reserve power supply coordination. The simulation shows that the users tend to reserve a specific quantity of power which is equal to the expected lowest reverse power supply in the condition of high risk aversion degree; however it will increase with the rise of feed-in tariff when the degree is low. In addition, the double marginalization which occurs in the reverse supply chain of V2G reserve power results in that the optimal reserve power of users cannot achieve the maximum mutual profit, in decentralized decision mode. Therefore two different coordination strategies for users with different risk aversion are proposed in this paper.

Abstract: The reasonable power and energy distribution problem of two energy sources in hybrid energy storage system in HEV has been studied. This paper focuses on the analysis power and energy requirements of energy storage system and influences by the drive cycle. The parameters sizing principle of the energy storage system is put forward from the angle of energy and power respectively. The results show that following the parameters matching principle, the hybrid energy storage source which is made up of battery and ultracapacitor can meet the double requirements for power and energy in the operation process of HEV. What’s more, a good foundation is laid for HEV parameters optimization of the energy storage sources.

Abstract: Based on the current research on the application of cloud computing and internet of vehicle, the design of electric vehicle’s operation management platform based on cloud computing is proposed. Firstly, the subsystem function design of electric vehicle’s operation management platform is analyzed, and the formation of platform is introduced. Then, based on theory of cloud computing and internet of vehicle, the software architecture, including core service layer, service management layer and user interface access layer, is built, and the key technology of operation management platform is analyzed. Finally, the system deployment based on private cloud and hybrid cloud is proposed. The research has an important role on the large-scale construction of electric vehicle operation network.

Abstract: Taking certain electric vehicle as target, tangential electromagnetic torque and harmonic analysis of drive motor is obtained using Ansoft 2D model. The inherent characteristic, propagated error, frequency response characteristics and waterfall curves of bearing are obtained using Romax 3D model. Then the NVH characteristic of driveline under certain rotational speed is evaluated, results can be applied to the structural matching of the driveline system for electric vehicles.

Abstract: Electric vehicles (EVs) play dual roles in micro-grids. They can be seen as a Vehicle to Grid load when in charge. While their powers are enough for moving, they can be seen as power supplies. In this paper, the optimization of distributed energies is discussed in a micro-grid, basing on multi-agent system (MAS). The result shows that the micro-grid with electric vehicles can not only make the most optimal use of renewable energies in the premise of keeping the voltage stability, but also reduces the investment of energy storage equipment. And with reasonable energy exchange prices, the electric vehicle owners can save their costs.

Abstract: Traditional distributed power sources are usually natural energy sources, their output power is not stable and difficult to join up to the grid. Battery electric vehicles(BEV) based on V2G technique is a new kind of Distributed Generation(DG). This paper introduces a V2G technique. A V2G-based BEV could be used to realize load shifting and stabilize the disturbance for DG's joining up with the grid. Many countries started researching V2G technique and in China NARI Group Corporation and Xuji Group Corporation have researched and started manufacturing practical V2G device. This paper also shows the main principle of V2G and its application in China, concludes its advantages and analyzes its development in the future.

Abstract: It is the considerable measure that adopting the ventilation solar wall to make up the indoor air in winter because this method embodies the effective use of renewable energy. This paper analyzes the needed volume of make-up air in the different conditions of indoor air exhaust in winter and builds a solar wall to heat the make-up air. Under the conditions of different solar wall size of air channel thickness and so on, Conclusions can be simulated by using CFD software. When the optimum cavity width B is 50mm, the height of air supply outlet D is 30mm and the volume of make-up air is 200 m3/h,the maximum temperature rise of the air rises to 24°C.But when the volume of make-up air is 600 m3/h, there has the best energy-saving effect.

Abstract: Reinforced soil has been among the most effective soil modification materials. Its use has been expanded rapidly into civil engineering, geotechnical engineering and pavement engineering. Reinforcing subgarde in pavement systems has always been an issue. This study focuses on effect of paper inclusion on the modulus of elasticity of subgrade material. Paper was used for this investigation. Paper contents and aspect ratio have been changed during these tests. The paper percentage varied from 0 % (for unreinforced samples) to 30%. Clay was used as sub grade material. Unconfined compression tests were carried out to investigate behaviour of the composite under different condition. The paper reinforcment length and paper reinforcment content found to play important rule on the modulus of elasticity of paper reinforced samples. Furthermore it was observed that ductility of sample increased by paper inclusion.

Abstract: It is crucial for ventilated double-skin facade (DSF) compared to single- skin facade to avoid high energy consumption, optic pollution and inadequate ventilation problems. In this paper, the performance of ventilated DSF applied to a building located in a university in cold zone (Tianjin) of China is tested. The original conditions of both outdoor and indoor within each testing room are comparatively same.The temperature behaviors of both the ventilated air cavity of DSF and indoor space with different experimental modes during summer are investigated. Additionally, the effects on indoor temperature due to the ventilated DSF with different modes in summer are also analyzed. The results shows that the ventilated DSF is a effective approach to reduce indoor temperature; the opening airflow windows of external façade of the DSF should be effective to lower temperature of both the ventilated air cavity of DSF and indoor space.