Modeling and Simulation of the Effects of Axial Diffusion on Fuel-Air Mixing Lengths in Micro-Power Systems

2006 ◽  
Author(s):  
Kiran Dellimore ◽  
Ananthanarayanan Veeraragavan ◽  
Christopher Cadou
Keyword(s):  
Power Systems ◽  
Modeling And Simulation ◽  
Axial Diffusion ◽  
Air Mixing ◽  
Micro Power

scholarly journals Modeling and simulation of transients in electric power systems using hybrid system theory

2019 ◽  
Vol 24 ◽  
pp. 02012
Author(s):  
Yury Shornikov ◽  
Evgeny Popov
Keyword(s):  
System Theory ◽  
Power Systems ◽  
Power System ◽  
Mathematical Models ◽  
Modeling And Simulation ◽  
Electric Power ◽  
Hybrid System ◽  
Electric Power Systems ◽  
Electric Power System ◽  
Simulation Environment

Transients in electric power systems are of great interest to power engineers when designing a new or maintaining an existing system. The paper deals with using hybrid system theory for modeling and simulation of an electric power system with controllers. The presented technique is rather convenient and recommended as mathematical models of transients in electric power systems with controllers in general contain both continuous and discrete components. The modeling and simulation were carried out in the modeling and simulation environment ISMA, which is briefly presented in the paper.

scholarly journals Demonstration of a micro-fabricated hydrogen storage module for micro-power systems

2011 ◽  
Vol 196 (2) ◽  
pp. 820-826 ◽  
Author(s):  
Xi Shan ◽  
Joe H. Payer ◽  
Jesse S. Wainright ◽  
Laurie Dudik
Keyword(s):  
Power Systems ◽  
Hydrogen Storage ◽  
Micro Power

Vortex Tube Applications in Micro-Power Generation

2002 ◽  
Author(s):  
Selin Arslan ◽  
Bojan Mitrovic ◽  
Michael R. Muller
Keyword(s):  
Pressure Drop ◽  
Power Systems ◽  
Steam Turbine ◽  
Vortex Tube ◽  
Low Pressure ◽  
Total Efficiency ◽  
Pressure Drops ◽  
Large Pressure ◽  
Micro Power ◽  
Vortex Tubes

The purpose of this paper is to study vortex tube performance characteristics and the use of vortex tubes to increase the total efficiency of power systems, especially micropower systems. A vortex tube is a device in which compressed air is made to swirl and separate into two low-pressure streams, one with higher temperature than the entry and the other lower. The lack of moving parts and electricity make the vortex tube attractive for a number of specialized applications where simplicity, robustness and reliability are desired. Vortex tubes are currently used for industrial cooling applications, separation technologies, and chemical analysis. It is well known that the temperature difference between the hot and cold sides of the vortex tube scales with the pressure drop. Also, at any pressure drop, the temperatures and flow rates are dependent on the flow fractions between the hot and cold sides. Data is available for large pressure drops, but this paper presents experimental results at low-pressure drops optimizing the operational modes for various applications. The micro-power systems under consideration include micro-turbines, which evolved out of automotive turbocharger technology. The use of vortex tubes in power systems has received some attention but the use of both the hot and cold streams has never been considered. In this work, we consider such dual use. As an example of an application, the vortex tube is considered in conjunction with a heat recovery steam generator (HRSG). The vortex tube splits the turbine exhaust flow into hotter and cooler streams. The cooler stream is still hot enough to supply all needed heat in the economizer section, leaving the hotter stream to increase the exit temperature from the superheater. In this way both the air leaving the HRSG and going to the steam turbine will have an increased enthalpy and cycle efficiencies are improved. In addition, steam turbine exit quality is increased.

Physical Implementation and Manufacture of Adiabatic Flip-Flops for Micro Power Systems

2011 ◽  
Vol 460-461 ◽  
pp. 724-729
Author(s):  
Hong Li ◽  
Yu Zhang ◽  
Jian Ping Hu
Keyword(s):  
Power Systems ◽  
Two Phase ◽  
Ultra Low Power ◽  
Power Efficient ◽  
Parasitic Extraction ◽  
Physical Implementation ◽  
Micro Power ◽  
Pass Transistor ◽  
Logic Cells ◽  
Micro Systems

Flip-flops are main logic cells in digital systems, thus power-efficient designs are essential for micro systems, where ultra low-power hardware is demanded. This paper presents physical implementation and manufacture of adiabatic flip-flops based on CPAL (Complementary Pass-transistor Adiabatic Logic) circuits. The two mode-10 adiabatic counters based on four-phase and two-phase CPAL circuits have been implemented. For comparison, a conventional mode-10 counter using static CMOS circuits has also been embedded in a test chip. Full-custom layouts are drawn, and full parasitic extraction is done. The post-layout simulations are carried out using HSPICE. The chip has been fabricated with Chartered 0.35um process and tested.

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