Evaluation of probabilistic models of wind plant power output characteristics

2010 ◽  
Author(s):  
Henry Louie
Keyword(s):  
Power Output ◽  
Probabilistic Models ◽  
Output Characteristics ◽  
Plant Power

scholarly journals A Novel Design of Multi-Chambered Biomass Battery

2013 ◽  
Vol 2 (1) ◽  
pp. 31 ◽  
Author(s):  
K. Sudhakar ◽  
R. Ananthakrishnan ◽  
A. Goyal ◽  
H.K. Darji
Keyword(s):  
Power Generation ◽  
Power Output ◽  
Rural Household ◽  
Raw Material ◽  
Cow Dung ◽  
Battery Design ◽  
Output Characteristics ◽  
First Time ◽  
Novel Design

In this paper, a novel design of biomass battery has been introduced for providingelectricity to meet the lighting requirements of rural household using biomass. A biomass battery isdesigned, developed and tested using cow dung as the raw material. This is done via anaerobicdigestion of the cow dung, and power generation driven by the ions produced henceforth. Thevoltage and power output is estimated for the proposed system. It is for the first time that such ahigh voltage is obtained from cow dung fed biomass battery. The output characteristics of thisnovel battery design have also been compared with the previously designed battery.

Maximizing Plant Power Output Using Dry Cooling System

2004 ◽  
Author(s):  
Ram Chandran
Keyword(s):  
Power Output ◽  
Cooling System ◽  
Combined Cycle ◽  
Ambient Temperatures ◽  
Turbine Efficiency ◽  
The Cost ◽  
The Impact ◽  
Lower Plant ◽  
Plant Power ◽  
Dry Cooling

As the power industry is deregulated, the cost of power plays a major role in obtaining long-term Power Purchase agreements. More and more plants, now, are developed with Dry Cooling System for condensing steam from the steam turbine of combined cycle plants or coal-fired plants. However, Dry Cooling has become synonymous with lower plant output. This paper presents solutions to dispel that myth. 1. Options available for control of the air-cooled system, their initial cost and the impact on minimizing internal power consumption and maximizing plant power output. 2. The air-cooled condenser operates normally at high turbine exhaust pressures during high ambient temperatures. The high backpressure results in lower turbine efficiency and lower plant output. Various options available are presented to combat this deficiency to maximize power output.

Comparison and Optimization of Heliostat Canting Methods

2007 ◽  
Author(s):  
R. Buck ◽  
E. Teufel
Keyword(s):  
Power Output ◽  
Power Plants ◽  
Solar Power ◽  
Power Level ◽  
Major Influence ◽  
Optical Efficiency ◽  
Tracking Method ◽  
Clear Advantage ◽  
Solar Power Plants ◽  
Plant Power

Heliostat canting (alignment of mirror facets) is known to have a major influence on the optical efficiency of heliostat fields and therefore on the power output of solar tower plants. In recent years several canting concepts were used, mainly on- and off-axis canting. Several new canting concepts, like stretched-parabolic or target aligned canting, were proposed in order to improve the performance of heliostats. As solar power plants become economically more attractive, knowledge about the influence of canting becomes more important. In this context, the influence of several factors on the canting method is discussed and optimal canting strategies are described. The considered factors comprise plant power level, heliostat position in the field, heliostat area, receiver dimension and site latitude. It is concluded that the target aligned tracking method is superior to all other variants in the majority of cases. As for the standard azimuth-elevation tracking methods, no one of these exhibits a clear advantage. It is only the on-axis method that performs worst in all cases.

A Novel Approach to Improving the Available Power Output of Piezoelectric Ultrasonic Motors

2004 ◽  
Author(s):  
R. M. Tieck ◽  
G. P. Carman
Keyword(s):  
Power Output ◽  
Contact Layer ◽  
Friction Forces ◽  
Ultrasonic Motors ◽  
Novel Approach ◽  
Baseline Testing ◽  
Limited Power ◽  
Industrial Use ◽  
Output Characteristics ◽  
Piezoelectric Ultrasonic Motor

Piezoelectric actuators have attractive operating properties because they do not generate electromagnetic fields and are not affected by them, and their power output characteristics scale linearly with decreasing size. These actuators have not seen widespread industrial use, however, because they have shown a limited power output. This work presents the initial efforts to increase the available power output of the Piezoelectric Ultrasonic Motor (PUSM). Commercially available PUSMs are limited by the small friction forces generated at the rotor/stator interface. Small friction is generated because current PUMs use rubber or polyimides on the rotor to create as the contact with the stator. Traditionally, PUSM contact material has consisted of rubber or reinforced polyimides. The authors intend to replace the traditional contact layer with a compliant super-elastic Nickel-Titanium (NiTi) thin film shape memory alloy (SMA) layer to increase the available power output by increasing the friction forces at the rotor/stator interface, without significantly increasing the size or weight of the actuator. The unmodified motors were baselined tested, modified, tested and the results compared. Recommendations are made with regard to the results of the modified baseline testing and possible implementation of micromachined ‘teeth’ configurations.

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