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Precise analysis of compressive strain effects on electric power generation properties of a lead zirconate titanate piezoelectric ceramic

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Journal of Advanced Ceramics 2016年第1期5卷 35-39页

作者： Mitsuhiro OKAYASU Keisuke WATANABE Graduate School of Natural Science and Technology Okayama University 3-1-1 Tsushimanaka Kita-kuOkayama 700-8530 Japan Graduate School of Science and Engineering Ehime University 3 Bunkyo-cho MatsuyamaEhime 790-8577 Japan

electric power generation characteristics of lead zirconate titanate (PZT) piezoelectric ceramic have been examined during cyclic loading with different compressive strain value. A thin PZT ceramic plate attached to a thin brass plate was used. With an increasing compressive strain value in the PZT ceramic plate, the electric voltage increased, and the highest electric voltage was obtained for the sample with the high strain level (0.4%). The electric voltage decreased for the sample with more than 0.45% strain because of the failure in the PZT ceramic. The electric voltage was different depending on the strain condition, where the higher strain and the wider strain range (Δε) made the high electric voltage. Moreover, the electric voltage was attributed to the strain rate, where the higher strain rate made higher electric voltage due to high kinetic energy. The electric generation characteristics could be estimated with an operation of the strain value and strain ratio (εmin/εmax) especially for the sample loaded cyclically under the slow loading speed. This was affected by the linear correlation between the electric voltage and the strain value. Based upon the experimental work, suitable loading condition to make high electric voltage could be proposed.

关键词： energy harvesting piezoelectric ceramic cyclic loading electric power generation

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A Chance Constrained Optimal Reserve Scheduling Approach for Economic Dispatch Considering Wind Penetration

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IEEE/CAA Journal of Automatica Sinica 2017年第2期4卷 186-194页

作者： Yufei Tang Chao Luo Jun Yang Haibo He IEEE Department of Computer & electrical Engineering and Computer Science and the Institute for Sensing and Embedded Network Systems EngineeringFlorida Atlantic University School of electrical Engineering Wuhan University Department of electrical Computer and Biomedical EngineeringUniversity of Rhode Island

The volatile wind power generation brings a full spectrum of problems to power system operation and management, ranging from transient system frequency fluctuation to steady state supply and demand balancing issue. In this paper, a novel wind integrated power system day-ahead economic dispatch model, with the consideration of generation and reserve cost is modelled and investigated. The proposed problem is first formulated as a chance constrained stochastic nonlinear programming U+0028 CCSNLP U+0029, and then transformed into a deterministic nonlinear programming U+0028 NLP U+0029. To tackle this NLP problem, a three-stage framework consists of particle swarm optimization U+0028 PSO U+0029, sequential quadratic programming U+0028 SQP U+0029 and Monte Carlo simulation U+0028 MCS U+0029 is proposed. The PSO is employed to heuristically search the line power flow limits, which are used by the SQP as constraints to solve the NLP problem. Then the solution from SQP is verified on benchmark system by using MCS. Finally, the verified results are feedback to the PSO as fitness value to update the particles. Simulation study on IEEE 30-bus system with wind power penetration is carried out, and the results demonstrate that the proposed dispatch model could be effectively solved by the proposed three-stage approach. © 2017 Chinese Association of Automation.

关键词： Constrained optimization Economics electric load flow electric power generation Intelligent systems Monte Carlo methods Nonlinear programming Optimization Particle swarm optimization (PSO) Problem solving Quadratic programming Scheduling Stochastic systems Wind power

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Towards an Ethical and Ecological Approach to electricity generation: A Comparative Analysis of Coal and Nuclear power in the USA

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Open Journal of Ecology 2020年第6期10卷 370-379页

作者： Joseph R. Laracy Department of Systematic Theology Seton Hall University South Orange NJ USA Department of Mathematics and Computer Science Seton Hall University South Orange NJ USA

According to the US Energy Information Administration, about 4118 billion kilowatt-hours (kWh) electricity was generated at large-scale generation facilities in 2019. About 63% of this was from fossil fuels, e.g., coal, natural gas, petroleum, and other gases. Environmental exposure to particulates, sulfur dioxide, nitrogen oxides, mercury, arsenic, radioactive fly ash, and other pollutants are extremely detrimental to the human cardiovascular, respiratory, and nervous systems. Such exposure increases the risk of lung cancer, stroke, heart disease, chronic respiratory diseases, respiratory infections, and other illnesses. In light of the challenges associated with renewables providing large quantities of base load power, as well as other factors, the benefits offered by nuclear power should be reexamined by policy makers to move the country towards a more ecological and ethical method of electric power production. This paper offers a concise analysis of many of the salient issues, comparing electricity generation from coal plants and light water nuclear reactors.

关键词： Nuclear Energy Coal electric power generation Ecology Safety Health

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Proposal of a Solar Thermal power Plant at Low Temperature Using Solar Thermal Collectors

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Energy and power Engineering 2022年第8期14卷 343-386页

作者： Patrick Lindecker Maisons-Alfort France

To this day, only two types of solar power plants have been proposed and built: high temperature thermal solar one and photovoltaic one. It is here proposed a new type of solar thermal plant using glass-top flat surface solar collectors, so working at low temperature (i.e., below 100°C). This power plant is aimed at warm countries, i.e., the ones mainly located between -40° and 40° latitude, having available space along their coast. This land based plant, to install on the seashore, is technologically similar to the one used for OTEC (Ocean Thermal Energy Conversion). This plant, apart from supplying electricity with a much better thermodynamic efficiency than OTEC plants, has the main advantage of providing desalinated water for drinking and irrigation. This plant is designed to generate electricity (and desalinated water) night and day and all year round, by means of hot water storage, with just a variation of the power delivered depending on the season.

关键词： power Plant Solar Thermal Solar Energy Renewable Energy Low Temperature Solar Collectors electric power generation Desalinated Water

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Hydro-automatic Gate with Suspended Type and Its Application in Tidal power

Hydro-automatic Gate with Suspended Type and Its Application...

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2009国际海洋能发展与技术研讨会暨第二届全国海洋能学术讨论会暨浙江省海洋学会海洋能源专业委员会成立大会

作者：顾正华徐锦才王传崑 College of Civil Engineering and Architecture Zhejiang University National Research Institute for Rural Electrification Second Institute of Oceanography State Oceanic Administration

A new hydro-automatic gate with suspended type was introduced,which includes two kinds of top-axis gate and shutter *** gate has the characteristic of being automatically opened in positive water-head and closed in negative water-head,then it can adaptively control tidewater flowing into and out of *** it may be designed very flexibly in the specific engineering and can be applied to tidal water and power resources regulation and other *** used hydro-automatic gate with suspended type in tidal power,and presented a new tidal power pattern with two-reservoir *** pattern can fully accept or drain tidewater according to tide rise and fall cycle,automatically adjust working head between upper and lower reservoirs,and make full use of wave energy and tidal inertia ***,it effectively improves conversion efficiency of tidal power,greatly reduces operation and maintenance cost of tidal power plant,and brings new development prospect for tidal power industry.

关键词： tidal energy electric power generation gate hydro-automatic suspense

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