Output power maximization using extremum seeking control for a vibration power generation system in multiple frequency vibration

2018 ◽  
Vol 2018 (0) ◽  
pp. 2P2-M03
Author(s):  
Tatsuya TAKE ◽  
Yohei KINDAICHI ◽  
Shigeru YAMAMOTO
Keyword(s):  
Power Generation ◽  
Output Power ◽  
Extremum Seeking ◽  
Multiple Frequency ◽  
Generation System ◽  
Extremum Seeking Control ◽  
Power Maximization ◽  
Power Generation System

Multi-Objective Optimal Mechanical Power for Turbine of River Current Power Generation Using Fuzzy Dominant Directed-Graph Method

2013 ◽  
Vol 284-287 ◽  
pp. 839-843
Author(s):  
Jian Long Kuo ◽  
Kai Lun Chao
Keyword(s):  
Power Generation ◽  
Taguchi Method ◽  
Output Power ◽  
Directed Graph ◽  
Optimal Solution ◽  
Generation System ◽  
Multi Objective ◽  
Optimal Output ◽  
Power Generation System ◽  
River Current

Abstract. The fuzzy dominant directed graph (fuzzy DDG) method is proposed in this paper to solve the multi-objective optimal mechanical turbine power of river current (RC) power generation system. Recently, there is great potential for the RC power generation system in renewable energy. The experimental Taguchi method is used to find the optimal solution for the power generation system. The optimization problem for the AC generator in RC power generation system is studied. The optimal output power with respect to three selected control factors is studied. By using Taguchi method, five cases are discussed. The testing case is the optimal output power problem. It is convinced that this method is applicable and easy to find the optimal solution quickly.

Energy Payback Optimization of Thermoelectric Power Generator Systems

2010 ◽  
Author(s):  
Kazuaki Yazawa ◽  
Ali Shakouri
Keyword(s):  
Power Generation ◽  
Heat Source ◽  
Thermal Resistance ◽  
Thermoelectric Power ◽  
Output Power ◽  
Heat Sink ◽  
Generation System ◽  
Thermoelectric Power Generation ◽  
Energy Payback ◽  
Power Generation System

An analytic model for optimizing thermoelectric power generation system is developed and utilized for parametric studies. This model takes into account the external thermal resistances with hot and cold reservoirs. In addition, the spreading thermal resistance in the module substrates is considered to find the impact of designing small fraction of thermo elements per unit area. Previous studies are expanded by a full optimization of the electrical and thermal circuits. The optimum condition satisfies both electrical load resistance match with the internal resistance and the thermal resistance match with the heat source and the heat sink. Thermoelectric element aspect ratio and fill factor are found to be key parameters to optimize. The optimum leg length and the maximum output power are determined by a simple formula. The output power density per mass of the thermoelectric material has a peak when thermo elements cover a fractional area of ∼1%. The role of the substrate heat spreading for thermoelectric power generation is equally significant as thermoelement. For a given heat source, the co-optimization of the heat sink and the thermoelectric module should be performed. Active cooling and the design of the heat sink are customized to find the energy payback for the power generation system. The model includes both the air cooled heat sinks and the water cooled micro channels. We find that one can reduce the mass of thermoelement to around 3∼10% of that in commercial modules for the same output power, as long as the module and elements are designed properly. Also one notes that higher heat flux sources have significantly larger energy payback and reduced cost per output power.

Power Generation Efficiency with Extremely Large Z factor Thermoelectric Material

2011 ◽  
Vol 1325 ◽  
Author(s):  
Kazuaki Yazawa ◽  
Ali Shakouri
Keyword(s):  
Power Generation ◽  
Thermoelectric Power ◽  
Output Power ◽  
Thermoelectric Material ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Generation System ◽  
Thermoelectric Power Generation ◽  
Power Generation System ◽  
The Impact

ABSTRACTA recently developed generic model of a thermoelectric power generation system suggests a promising future for cost effective and scalable power generation. The model is based on co-optimizing the thermoelectric module together with the heat sink. Using this model, efficiency at maximum output power is calculated. It is shown that this approaches the Curzon-Ahlborn limit at very large Z values which is consistent with thermodynamic systems with irreversible heat engines. However, this happens only when the thermal resistances of the thermoelectric device with hot and cold heat sinks exactly match. For asymmetrical thermal resistances, the efficiency at maximum output power is different. This is consistent with the very recent results for the thermodynamic engines. Finally, we study the impact of lowering the thermal conductivity of the thermoelectric material or increasing its power factor and how these affect the performance of the thermoelectric power generation system.

Development and experimental research on circumferential impulse microturbine power generation system

2013 ◽  
Vol 228 (2) ◽  
pp. 378-387 ◽  
Author(s):  
L Zhang ◽  
GZ Tang ◽  
ZB Liao ◽  
HC Shang
Keyword(s):  
Power Generation ◽  
Output Power ◽  
Rotational Speed ◽  
Maximum Output Power ◽  
Iron Core ◽  
Maximum Output ◽  
Generation System ◽  
Coil System ◽  
Coil Structure ◽  
Power Generation System

Circumferential impulse microturbine is a key component of the micro-electro-mechanical system and provides power to the latter. An innovative concept of microturbine power generation system was presented, and prototype improved circumferential impulse microturbine power generation systems were developed, and their output performances were tested. It is validated that the system can operate at a high speed in a dynamic equilibrium state using rolling bearings, and it is found that the output power and rotational speed of a six-blade turbine hollow-cup coil structure is higher than the output power and rotational speed of a six-blade turbine iron-core coil structure. The maximum output power of the eight-blade turbine hollow-cup coil power generation system is 1.1 W, and the maximum turbine rotational speed is 55,000 r/min. The maximum output power of the eight-blade turbine hollow-cup coil system increases up to 25% when compared to the six-blade turbine hollow-cup coil system and increases up to 83% when compared to the six-blade turbine iron-core coil system.

Analysis of the Characteristics of PMSG Tidal Current Power Generation System Using PMSG and Water Tunnel

2014 ◽  
Vol 548-549 ◽  
pp. 847-850 ◽  
Author(s):  
Won Young An ◽  
Hyung Taek Lim ◽  
Seok Hyun Lee ◽  
Cheon Lee ◽  
Gun Su Kim ◽  
...  
Keyword(s):  
Power Generation ◽  
Output Power ◽  
Tidal Current ◽  
Tidal Flow ◽  
Stream Velocity ◽  
Water Tunnel ◽  
Generation System ◽  
Flow Transducer ◽  
Power Generation System ◽  
Tunnel System

In order to analyze the characteristics of tidal current power generation system, we measured the output power according to the stream velocity by a water tunnel system and a simulation in MATLAB/Simulink. The water tunnel system consisted of impeller tidal flow transducer and permanent magnet synchronous generator (PMSG) with rotor in the water. The simulation consisted of PMSG, the tidal current turbine, and Back-to-Back converter. Also, we simulated the characteristics of output power according to the change of blade radius and velocity.

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