Time filter

Source Type

Jilin, China

Northeast Dianli University is a university in Jilin, China. It was formed in 1949 in Changchun and was moved to Jilin in 1955. It focuses on engineering and has 14,235 full time students. Wikipedia.

Li Z.,University of Missouri | Yang M.,University of Shanghai for Science and Technology | Yang M.,Northeast China Institute of Electrical Power Engineering | Zhang Y.,University of Missouri
Journal of Thermophysics and Heat Transfer | Year: 2014

A hybrid lattice Boltzmann and finite volume method is proposed for fluid flow and heat transfer simulation. The lattice Boltzmann method was appliedto obtain the velocity field, whereas the finite volume method was usedtoobtain the temperature field. The two-dimensional nine discrete velocities (D2Q9) model and nonequilibrium extrapolation scheme boundary condition were used in the lattice Boltzmann method, and the SIMPLE algorithm with the QUICK scheme was employedinthe finite volume method. Natural convection with different Rayleigh numbers was solved by the hybrid method, and the results agreed very well with those obtained from a pure finite volume method and pure thermal lattice Boltzmann method. This is the first time that the hybrid lattice Boltzmann with the finite volume method has been applied to solve natural convection problem. Copyright © 2013 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

Essalaimeh S.,Northeast China Institute of Electrical Power Engineering | Al-Salaymeh A.,University of Jordan | Abdullat Y.,University of Jordan
Energy Conversion and Management | Year: 2013

The present work shows an experimental investigation of using a combination of solar and wind energies as hybrid system for electrical generation under the Jordanian climate conditions. The generated electricity has been utilized for different types of applications and mainly for space heating and cooling. The system has also integration with grid connection to have more reliable system. Measurements included the solar radiation intensity, the ambient temperature, the wind speed and the output power from the solar PV panels and wind turbine. The performance characteristic of the PV panels has been obtained by varying the load value through a variable resistance. Some major factors have been studied and practically measured; one of them is the dust effect on electrical production efficiency for photovoltaic panels. Another factor is the inclination of the PV panels, where varying the angle of inclination has a seasonal importance for gathering the maximum solar intensity. Through mathematical calculation and the collected and measured data, a simple payback period has been calculated of the hybrid system in order to study the economical aspects of installing such a system under Jordanian climate conditions and for different usages and local tariffs including domestic, industrial and commercial applications. It was found through this work that the generated electricity of hybrid system and under Jordanian climate conditions can be utilized for electrical heating and cooling through split units and resistive heaters. © 2012 Elsevier Ltd. All rights reserved.

Wang Y.-Z.,Jiangsu University | Zhang X.-B.,Northeast China Institute of Electrical Power Engineering
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2011

The vibration response of flexible beam under the action of coupled multi-moving-masses with variable speeds was studied. Based on the vibration theory of flexible beam, the vibration model of the multi-moving masses-flexible-beam system was established. The interaction among the moving masses and the coupling effect between the motions of moving masses were considered in the model and the vibration of the flexible beam was analysed. The numerical simulation was conducted by using the solving method of time-variant mechanical system. The results show that the vibration response of the flexible beam is different under different forms of relative motions among the moving masses, and the coupling effect among moving masses enhance the vibration response of the flexible beam.

Ma Y.,University of Shanghai for Science and Technology | Guo X.,Northeast China Institute of Electrical Power Engineering | Xiao F.,Northeast China Institute of Electrical Power Engineering | Shi D.,Shanghai J. E Power Plant Equipment Co.
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2013

This paper advanced an efficient lignite-fired power generation technology based on open pulverizing system with flue gas drying fan mill and recovery of heat and water from pulverizing exhaust. In order to demonstrate the security, energy saving and water recovery advantages of this new technology, a detailed comparative calculation and analysis was performed by comparison with an operating 600 MW power generating unit which fired Chinese lignite with total moisture 39.5% and applied traditional direct-fired pulverizing system. The calculation results show that the gross standard coal consumption rate could be reduced about 10 g/(kW(h) by applying this new technology, meanwhile the investment of boiler island could be slightly reduced and the service power remained unchanged on the whole. On the other hand, a mass of water resource could be recovered from lignite by cooling the high moisture pulverizing exhaust, so that it's possible to realize a lignite-fired power plant with zero water consumption if those recovered water was used as make-up water for power plant. Moreover, due to the inert dryer composed of hot and cool flue gas, the long-standing security problem of pulverizing system explosion often occurred in lignite-fired power plants could be avoided by this new technology. Additionally, no extra pollutant emission resulted from this new technology as the foregoing advantages were performed. From the perspective of engineering applications, the technology processes and the relevant facilities of this technology are matured in nowadays coal-fired power plants, and this new technology can be easily assembled with those coal-fired power generation technologies with a view to heighten steam parameters, such as supercritical pressure, ultra-supercritical pressure, double reheat and 700°C thermal power plant, etc. So it's a green and efficient lignite-fired power generation technology to be worthy of further research and application, for the marked environmental and economic benefits of lignite region. © 2013 Chinese Society for Electrical Engineering.

Wang H.,Northeast China Institute of Electrical Power Engineering | Yu T.,Northeast China Institute of Electrical Power Engineering | Tang J.,Shaoguan Power Supply Bureau
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2014

This paper proposed a multi-agent decentralized correlated equilibrium Q(λ) (DCEQ(λ)) learning algorithm to tackle automatic generation control (AGC) under strong random gird environment considering emerging renewable energy sources. This algorithm does not need to consider the tradeoffs between exploitation and exploration, it also does not need any knowledge of the system model and uses the trial and error methods to find the most desired policy. After the adaptive problem of this algorithm in AGC fields had been figured out, an improved reward function and an equilibrium selected function integrated with fair factor were proposed. Three kinds of eligibility traces were also analyzed and SARSA(λ) was introduced in this algorithm to reassign the delayed reward appropriately due to the long time-delay control link such as AGC thermal plants. Simulation tests on a two-area load frequency control (LFC) power system model and China Southern Power Grid demonstrated that DCEQ(λ) controller has better control performance than Q(λ) controller, and can effectively smooth the instantaneous value of automatic generation control (ACE) and control performance standard (CPS), and thus improve the stability and robustness of interconnected power systems. © 2014 Chin. Soc. for Elec. Eng.

Discover hidden collaborations