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Hongtian Ge, Andrew J. Furlong, Scott Champagne, Robin W. Hughes, Jan B. Haelssig and Arturo Macchi
The concentration of residual O2 in oxy-fuel combustion flue gas needs to be reduced before CO2 transportation, utilization, or storage. An original application of the printed circuit heat exchanger (PCHE) for catalytic combustion with natural gas (catal...
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Rongsheng Zhu, Wenhao Shi, Gongchang Gan, Huairui Li, Dawei Yang, Yuchen Duan and Qiang Fu
To investigate the transient characteristics of high-speed axial flow water-jet pumps during start-up and emergency acceleration as well as to analyze how different accelerations affect the performance of internal flow, the k?? turbulence model of the SS...
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Nan Zhu, Ji Li, Lei Shao, Hongli Liu, Lei Ren and Lihua Zhu
A running transformer frequently experiences interturn faults; they are typically difficult to detect in their early stages but eventually progress to interturn short circuits, which cause damage to the transformer. Therefore, finding out the fault mecha...
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Wencheng Guo, Bingbao Wang and Lu Zhao
The transient process is the key for the design, operation and maintenance of the pipeline network system of the water supply project. This paper aims to study and develop a new type of visual numerical simulation software for the transient process of pi...
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Javier Menéndez, Jesús M. Fernández-Oro, Mónica Galdo and Jorge Loredo
The increasing penetration of variable renewable energies (VRE) in the European electricity mix requires flexible energy storage systems (ESS), such as pumped storage hydropower (PSH). Disused mining voids from deep closed mines may be used as subsurface...
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Wencheng Guo, Yang Liu, Fangle Qu and Xinyu Xu
The critical stable sectional area (CSSA) for surge tanks corresponds to the critical stable state of hydropower stations and is an important index to evaluate the stability of the turbine regulation system. The research on CSSA for surge tanks is always...
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Sheam-Chyun Lin, Yu-Ming Lin, Yu-Song Haung, Cheng-Liang Yao, Bo-Syuan Jian
Pág. 133 - 140
Pneumatic solenoid valve has been widely used in the vehicle control systems for meeting the rapid-reaction demand triggered by the dynamic conditions encountered during the driving course of vehicle. For ensuring the safety of human being, the reliable ...
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Oleksii Havrylenko,Serhii Kulinich
Pág. 30 - 37
A hydraulic drive with two hydraulic cylinders was considered in which the rod movement speeds are synchronized by a divider of the working fluid flow. Based on the developed mathematical model, operation of synchronized hydraulic cylinders in transient ...
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Qin Zhou, Linsheng Xia and Chunze Zhang
The runaway oscillation process of the pump-turbine in a high head pumped-storage power plant is usually unstable. The root cause of its instability is still unclear. In this paper, its internal mechanism and the improvement method were studied in depth....
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Jiandong Yang, Huang Wang, Wencheng Guo, Weijia Yang and Wei Zeng
Hydroelectric power plants? open-type surge tanks may be built in mountains subject to the provision of atmospheric air. Hence, a ventilation tunnel is indispensable. The air flow in the ventilation tunnel is associated with the fluctuation of water-leve...
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Bertha María Soriano González,Frank Grau Merconchini,Llohandry Cruz Carnero
Pág. 295 a la 3
Este trabajo expone una metodología para estudiar procesos transitorios de corriente alterna y directa, en circuitos eléctricos lineales con un solo elemento almacenador de energía, empleando un sistema de instrumentación con una computadora y una tarjet...
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D. A. Zabarilo
Pág. 29 - 35
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Abdul-Fattah Mohamed Ali
The normalized settling time (ts /t) values of oscillatory 2nd-order systems, when subjected to a step-change forcing function (SCFF), depend on the sensitivity of the measuring instrument employed to indicate the response (± x%). An at...
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Bao Jia, Jyun-Syung Tsau, Reza Barati and Fan Zhang
There exits a great challenge to evaluate the flow properties of tight porous media even at the core scale. A pulse-decay experiment is routinely used to measure the petrophysical properties of tight cores including permeability and porosity. In this stu...
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Weijia Yang, Jiandong Yang, Wencheng Guo, Wei Zeng, Chao Wang, Linn Saarinen and Per Norrlund
This paper presents a mathematical model of hydro power units, especially the governor system model for different operating conditions, based on the basic version of the software TOPSYS. The mathematical model consists of eight turbine equations, one gen...
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Daqing Zhou, Huixiang Chen and Languo Zhang
The transient characteristic of the power-off process is investigated due to its close relation to hydraulic facilities’ safety in a pumped storage hydropower (PSH). In this paper, power-off transient characteristics of a PSH station in pump mode w...
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Grigore Cican
In this paper, we investigate the impact of diesel and kerosene on the transient processes occurring in a micro-turbojet aviation engine. The experiments were conducted under two distinct ambient temperature conditions, 0 and 20 °C. Specifically, we anal...
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Xuli Quan, Xinchun Lin, Yun Zheng and Yong Kang
In the transient process of the grid-connected converter (GCC), the existing research mainly focuses on the impact of the control loops. Little attention is paid to the transient stability issues driven by the imbalance between the input power and output...
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Mei Hong
Pág. pp. 68 - 79
Electronic nose gas recognizer is a kind of instrument simulating biological olfactory function for gas detection, which is widely applied in underground construction, aerospace, medical treatment and other fields. The sensing mechanism of the wireless s...
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Daqing Zhou, Huixiang Chen and Languo Zhang
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