Abstract: Switched reluctance motor (SRM) has a simple, inexpensive and reliable construction due to the concentrated coils on stator pole and no conductors or magnets on the rotor pole. The advantages on the SRM operation such as high speed, high torque to inertia ratio, fault tolerant, low inertia and low inrush currents, make it a better choice for use in different applications. The dynamic behavior of the SRM on various conditions should be studied. This paper aim is to develop a Matlab model of a 6/10 SRM using the mathematic equations. As the results, the simulation shows the impact of load torque on the phase current profile, speed profile, and inductance profile. The simulation is performed the characteristics of the switched reluctance motor in Matlab environment to show the efficiency of the proposed model.
Abstract: The choice of wind measured data and numerical simulation method has an important impact on the results of wind resource assessment. This paper will take a wind farm, in Yangjiang City, Guangdong Province, for an example and discuss the simulation accuracy by linear model WAsP and nonlinear model based on simulation software Fluent. First of all, contrast mean absolute percentage error (MAPE) about simulated wind speed under four kinds of wind conditions, which are simulated by four sets of wind data in WAsP, and then select the wind data with the smallest . Then, using WAsP and CFD method simulates wind field by the optimal wind data. Compare simulated wind speed and annual generation capacity. In this paper, the simulated wind speed in the simulation model CFD based on Fluent is closer to the measured wind speed. The MAPE of wind speed and annual generation capacity by CFD model is smaller than that by WAsP. Therefore, for the wind resource assessment in the complex terrain, the nonlinear model CFD based on Fluent will be qualified to response the relationship between wind resource and terrain, simulation accuracy, and has higher simulation accuracy than the linear model WAsP.
Abstract: The configuration diagram of wheeled vehicle was presented and the mathematical model of the important components was built according to the working principle of system. The subsystem properties of wheeled vehicle have analyzed by means of simulation method. Moreover, the climbing characteristic and anti- skidding properties of wheeled vehicle have done, the results shows that dual pump driving system is superior to a single pump driving system in terms of obstacle negotiation.
Abstract: A hybrid power generation system which can collect wave energy and wind energy at the same time has been designed and developed in order to solve the problem that the power generation system can only use a single forms marine energy to generate electricity at present. Hybrid power generations main structure, wave energy collecting device, wind energy collecting device, power generation device were described. The system can convert simultaneously wave energy and wind energy to rotation axis kinetic energy and yield electricity by 5kW permanent magnet generator. The new power generation method of marine energy can improve the utilization efficiency and promote the development of marine energy power generation technology.
Abstract: The author puts forward the design scheme of 1 kw al-air battery based on analysis of key techniques such as the activation and anti-corrosion of aluminum anode, air cathode preparation, catalyst research, electrolyte additive. Function parameters of cell stack are calculated, and introduce its component functions, including control design, functional electrolyte circulation, air transport, DC / AC inverter system and others.
Abstract: This paper analyzed the practical needs of remote monitoring of electric vehicle and illustrates the overall architecture of a remote monitoring system, and further developed a remote monitoring system of the Server and client application with the ASP.NET and Microsoft SQL Server database language, basically can meet the electric cars remote monitoring of the Server and client needs.
Abstract: Water spray cooling is widely used in many industrial processes to control heat removal from a hot material surface. In this work, pressurized spray nozzle was applied to break film boiling immediately once the quenching process is started. For this purpose, a circular disc made of non-ferrous metals is heated to approximately 850 °C and sprayed on one side by hydraulic nozzle and the temperature distribution with respect to time and space is measured by using Infrared camera. On the other side, the measured surface was coated with graphite paint in order to achieve a high emissivity. By this IR thermography, transient temperature measurement can be carried out within the window of 320 × 80 pixels. The heat transfer was analyzed through 1D method. In this method, the temperature difference between both sides neglected. The local heat transfer can then be calculated from a simple differential energy balance.
Abstract: In the cold and severe cold regions of our country, the average temperature in winter outdoor usually below -20°C. Air conditioning units was limited and damaged when it running under such conditions. In order to solve the the problems pointed out previously, the paper put forward solutions of the fresh air handling units in combination with heat pump unit of heat recovery fresh air and heat pipe heat pump low temperature heat recovery unit. Comparison energy-saving and recovery period of the two method through experimental research.
Abstract: The Bunsen burner was improved to measure the flame propagation speed of biomass gases with different kinds of components using angle method on test bench. The influences of different components, especially CO2, on flame speed propagation and the relations between flame speed and primary air ratio were measured and analyzed. Results show that flame propagation speed decreases with the increase of CO2. And for a particular kind of gas, flame propagation speed has the maximum value when primary air ratio is close to 1.