scholarly journals Marine Hydrokinetic Turbine Power-Take-Off Design for Optimal Performance and Low Impact on Cost-of-Energy

2013 ◽  
Author(s):  
Mike J. Beam ◽  
Brian L. Kline ◽  
Brian E. Elbing ◽  
William Straka ◽  
Arnold A. Fontaine ◽  
...  
Keyword(s):  
High Efficiency ◽  
Mechanical Design ◽  
High Reliability ◽  
Low Cost ◽  
Hydraulic Drive ◽  
Electrical Energy ◽  
Good Efficiency ◽  
Cost Of Energy ◽  
Marine Hydrokinetic ◽  
Maintenance Requirements

Marine hydrokinetic devices are becoming a popular method for generating marine renewable energy worldwide. These devices generate electricity by converting the kinetic energy of moving water, wave motion or currents, into electrical energy through the use of a Power-Take-Off (PTO) system. Most PTO systems incorporate a mechanical or hydraulic drive train, power generator and electric control/conditioning system to deliver the generated electric power to the grid at the required state. Like wind turbine applications, the PTO system must be designed for high reliability, good efficiency, long service life with reasonable maintenance requirements, low cost and an appropriate mechanical design for anticipated applied steady and unsteady loads. The ultimate goal of a PTO design is high efficiency, low maintenance and cost with a low impact on the device Cost-of-Energy (CoE).

Ternary Copper-Based Diamond-Like Semiconductors for Thermoelectric Applications

2009 ◽  
Vol 1166 ◽  
Author(s):  
Donald T Morelli ◽  
Eric J. Skoug
Keyword(s):  
Thermoelectric Materials ◽  
Waste Heat Recovery ◽  
High Efficiency ◽  
Waste Heat ◽  
Low Cost ◽  
Electrical Energy ◽  
Clean Energy ◽  
Direct Conversion ◽  
Thermoelectric Device ◽  
Climate Control

AbstractThermoelectric materials can provide sources of clean energy and increase the efficiency of existing processes. Solar energy, waste heat recovery, and climate control are examples of applications that could benefit from the direct conversion between thermal and electrical energy provided by a thermoelectric device. The widespread use of thermoelectric devices has been prevented by their lack of efficiency, and thus the search for high-efficiency thermoelectric materials is ongoing. Here we describe our initial efforts studying copper-containing ternary compounds for use as high-efficiency thermoelectric materials that could provide low-cost alternatives to their silver-containing counterparts. The compounds of interest are semiconductors that crystallize in structures that are variants of binary zincblende structure compounds. Two examples are the compounds Cu2SnSe3 and Cu3SbSe4, for which we present here preliminary thermoelectric characterization data.

scholarly journals Technologies for Distributed Generation: key performance factors for industrial application

2018 ◽  
pp. 80-87 ◽  
Author(s):  
G. G. Nalbandyan ◽  
S. S. Zholnerchik
Keyword(s):  
Distributed Generation ◽  
Electricity Market ◽  
Smart Grids ◽  
Large Scale ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Retail Trade ◽  
Economic Effects ◽  
The Cost

The reduction in the cost of technologies for distributed generation involves an increasing decentralization of power generation and large-scale development of distributed sources around the world. This trend is a key change in both the characteristics of electricity consumption: it is becoming increasingly flexible and mobile, and the patterns of consumer behavior in the electricity market. Electricity consumers are becoming at the same time its suppliers and require revision of traditional regulation standards of the electricity market. The purpose of the article is to assess the influence of distributed generation on the economy of both enterprises and the country as a whole. To identify the effects of the introduction of distributed generation technologies, the method of case study analysis is used. The empirical analysis was carried out on the basis of twelve Russian companies that use their own energy sources. The selected companies belong to the following industries: industrial production, housing and communal services, retail trade, construction, agriculture. Technological and economic effects are revealed. Technological ones include: improving consumer reliability, energy security, involving local energy resources, optimizing load management and redundancy, providing the flexibility of smart grids (in terms of generation), reducing the load on the environment, including CO2 emissions. Economic effects: optimization of the load schedule, reduction of losses in the process of transmission/distribution of energy, expansion of cogeneration, etc., providing the consumer with the electricity of a given quality, saving losses in networks, reducing the cost of energy. The identified effects of the introduction of distributed generation technologies make it possible to highlight the advantages of regeneration facilities: high efficiency and the possibility of cogeneration and trigeneration, individual maneuvering capacity loading, high reliability of equipment, low cost of transportation of electricity, fuel usage of the by-products and the main production waste. In conclusion, recommendations are formulated on a set of measures for the development of industrial distributed generation in Russia at the Federal level.

The Design for Automatic Target Reporting System Based on Image Processing

2013 ◽  
Vol 756-759 ◽  
pp. 3446-3449
Author(s):  
Zhi Hui Xu ◽  
Wei Zhong Li ◽  
Yong Jun Xiao
Keyword(s):  
Image Processing ◽  
High Efficiency ◽  
Reporting System ◽  
High Reliability ◽  
Low Cost ◽  
The Way

Photo-electricity target with low cost, high efficiency and high reliability is widely used for gunnery training in military affairs and athletic sports. The automatic target reporting system based on image processing is constructed and some experimental is done. The result is shown that compared to the way of manual target, automatic target reporting system has the character of easy to operate, low-cost and easy to popularize.

Proposal of High-Quality Laser Hardening System for Shaft Parts Using Cylindrical Mirror and Ring-Beam Shaped by High-Speed Laser Scan System

2020 ◽  
Author(s):  
Hirotaka Tanabe ◽  
Keiji Ogawa ◽  
Heisaburo Nakagawa ◽  
Hirohito Tsukada ◽  
Yuki Goto
Keyword(s):  
Heat Treatment ◽  
Laser Beam ◽  
High Speed ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Treatment Method ◽  
Post Processing ◽  
High Quality ◽  
Almost All

Abstract Shaft parts are important parts used in almost all machines including automobiles. In addition, extremely high reliability is required since a shaft failure is directly linked to a fatal machine trouble. Therefore, a hardening process is usually conducted to improve strength and wear resistance. In this study, we propose a new laser heat treatment method to produce high-quality and high-accuracy shafts with high efficiency, low cost and low environmental impact. We will also develop a technique to derive the appropriate laser irradiation conditions quickly and systematically for shafts with various shapes and dimensions. There are the other hardening techniques including the electric furnace method and the induction method. These methods require post-processing for deformation correction, whereas the proposed method uses a laser to achieve thermal deformation-free hardening, eliminating the need for the post-processing. As a result, an improvement in yield can be expected due to a reduction of the products that cannot be corrected after heat treatment, which had to be waste disposed with conventional methods. By using our method, the entire circumference of the shaft was hardened by using a ring-shaped laser beam and a cylindrical inner mirror. Here, the ring-shaped laser beam was formed by high-speed scanning of a spot shapelaser. In the present paper, the details of this system were introduced and some experimental results were described.

Study on a New Array of Oscillating Wave Energy Converter

2014 ◽  
Vol 672-674 ◽  
pp. 432-435 ◽  
Author(s):  
Meng Shao ◽  
Hong Da Shi ◽  
Fei Fei Cao ◽  
Kai Zhu ◽  
Zheng Quan Zhang ◽  
...  
Keyword(s):  
Wave Energy ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Wave Energy Converter ◽  
Design Parameters ◽  
New Wave ◽  
Energy Converter ◽  
On Demand ◽  
Converter Unit

The paper presents a new array of oscillating wave energy converter, which is in accordance with nowadays’ research tendency of China: high power, high efficiency, high reliability and low cost. The paper gives the design scheme and design parameters of the new wave energy converter. It's composed of the wave energy converter unit, which can be assembled to arrays based on demand. Besides, the paper analyzes the power generation principle and advantages of the device. The research results could be a reference for wave energy’s exploration and utilization.

scholarly journals Dimmable LED Driver For DC Distributed Lighting System

2020 ◽  
Author(s):  
Mohammad Meraj ◽  
Syed Rahman ◽  
Atif Iqbal ◽  
Lazhar Ben Brahim
Keyword(s):  
Distribution Systems ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Road Transport ◽  
Maximum Efficiency ◽  
Lighting System ◽  
Led Driver ◽  
Lighting Systems ◽  
Industrial Lighting

This abstract proposes a high brightness, high efficiency, dimmable LED driver based on linear current regulator technology for DC grid distribution systems. The proposed driver has excellent characteristics like the highest lumen per watt, long lifetime, high reliability, compact, low cost, both environmental and user-friendly which makes it suitable for lighting applications. Steady state and small-signal models of the proposed driver are performed which help in minimizing ground current and accurate compensator design, respectively. These two modeling approaches result in the optimization of both the footprint and cost of the driver. The performance of the proposed experimental prototype of the 20W driver is developed to validate the performance at different dimming levels and achieves maximum efficiency of 97%. The applications of the proposed converter are: dimmable home lighting system, advertisement boards and hoardings, industrial lighting systems, road transport indication lamps, indoor and outdoor stadium lighting, automatic street lighting, decorative systems, health appliances and auditoriums and many more.

scholarly journals Pipeline Pumps for Energy Efficiency and High Reliability

1998 ◽  
Author(s):  
H. Samarasekera ◽  
R. Lueneburg ◽  
T. Morton
Keyword(s):  
High Efficiency ◽  
Mechanical Design ◽  
High Reliability ◽  
Cost Savings ◽  
Pump Efficiency ◽  
Potential Cost ◽  
Equipment Reliability ◽  
Pipeline Systems ◽  
Key Variables ◽  
Capacity Flexibility

Key variables in the design of pipeline systems are pump efficiency, equipment reliability, and throughput flexibility since they significantly influence the pipeline operating costs. Pumps commonly used in pipelines operate at high efficiency only at the Best Efficiency Point (BEP) capacity. Outside this capacity, efficiency decreases and the wasted energy is converted into harmful vibrations, noise and heat, contributing to premature pump failures. Conventional pumps do not provide capacity flexibility to a pipeline. A horizontal split case pump with replaceable diffusers and capable of accommodating a series of impellers has been developed. An impeller/diffuser combination with a BEP capacity matching the pumping capacity is selected to maximise efficiency. Since it operates close to BEP capacity, minimal pump vibrations and noise improve pump reliability. Hydraulic and mechanical design features of the pump, some concepts for the future and a discussion of the potential cost savings when used in pipeline systems are presented.

Pulsed electrochemical and electroless techniques for efficient removal of Sb and Pb from water

2018 ◽  
Vol 4 (12) ◽  
pp. 2179-2190 ◽  
Author(s):  
Saba Mosivand ◽  
Lorena M. A. Monzon ◽  
Iraj Kazeminezhad ◽  
Anup Kumar ◽  
J. Michael D. Coey
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Electrical Energy ◽  
Efficient Removal ◽  
Mine Wastewater ◽  
Fast Coagulation

Two innovative electrochemical approaches for removing both antimony and lead from water using sacrificial iron sheets are reported; a pulsed method for fast coagulation and a slower electroless method with high efficiency, low cost and no requirement for electrical energy. The study covers laboratory samples and mine wastewater.

Design of Boundary Mode Flyback Control Auxiliary Power Supply of a PV Inverter

2013 ◽  
Vol 291-294 ◽  
pp. 121-126 ◽  
Author(s):  
Ya Jing Li ◽  
Wei Dong Geng
Keyword(s):  
Power Supply ◽  
High Efficiency ◽  
Solar Power ◽  
High Reliability ◽  
Low Cost ◽  
Detail Design ◽  
Pv Inverter ◽  
Auxiliary Power ◽  
Boundary Mode ◽  
Power Inverters

This paper analyzes the principle of boundary mode flyback topology, presents a five-output auxiliary power supply of 3KW solar power inverter without the optocoupler feedback regulator circuit. The circuit has the characteristics of a simple structure, low cost, high efficiency and high reliability . The multi-output auxiliary power supply of the PV inverter schematic and a high frequency flyback transformer detail design are given. This power supply has been already used in an inverter. The experiment results prove that the auxiliary power supply has a stable work state, a low output ripple, a transformer without fever phenomenon, and meet the requirements of Solar power inverters.

Sign in / Sign up

Export Citation Format

Share Document