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相关概念视频

Wind Turbine Machine Models01:24

Wind Turbine Machine Models

110
In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
110
Turbine-Governor Control01:17

Turbine-Governor Control

178
Turbine-governor control is crucial for maintaining power system stability by balancing turbine mechanical power output with electrical load demand. This mechanism ensures that generator frequency and rotor speed are within acceptable limits during load variations. Turbine-generator units store kinetic energy due to their rotating masses; this energy is released to meet the load requirement when the load increases. The electrical torque of turbines rises to meet the demand, whereas the...
178
Generation of Three-Phase Voltage01:21

Generation of Three-Phase Voltage

363
A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...
363
Faraday Disk Dynamo01:23

Faraday Disk Dynamo

2.1K
A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
2.1K
Generator Voltage Control01:21

Generator Voltage Control

132
Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand,...
132
Effects of Temperature on Free Energy02:11

Effects of Temperature on Free Energy

25.2K
The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
25.2K

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相关实验视频

Updated: Jun 12, 2025

Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
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由风能驱动的自动供电温度变化系统由风能驱动.

Jiayu Li1,2, Boxun Liu1,2, Mingyang Li3,4

  • 1Center on Nanoenergy Research, Institute of Science and Technology for Carbon Peak & Neutrality, Guangxi University, Nanning, 530004, China.

Microsystems & nanoengineering
|September 26, 2024
PubMed
概括
此摘要是机器生成的。

研究人员开发了一个自动供电的温度控制系统,使用旋转 triboelectric 纳米发电机 (TENG) 和铁电陶. 这种创新的设备有效地收集环境能量用于冷却和加热应用,减少能源消耗.

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Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption
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科学领域:

  • 材料科学 材料科学 材料科学
  • 收集能源 收集能源
  • 纳米技术 纳米技术

背景情况:

  • 户外,移动和自动供电的温度控制设备对于降低冷却和加热的能源消耗至关重要.
  • 现有技术在效率和能源采集能力方面面临限制.
  • 铁电陶为温度调节提供有前途的电热性能.

研究的目的:

  • 开发一个自动供电的温度量化控制系统.
  • 将一个旋转盘形状的 triboelectric 纳米发电机 (TENG) 与铁电陶集成,以获得高效的能量收集和电热效应刺激.
  • 评估系统在冷却和加热应用中的性能.

主要方法:

  • 制造一个旋转盘形TENG,其最大开放电路电压为6913V.
  • 一种0.15PbTiO3-0.85PbSc0.5Ta0.5O3 (0.15PT-0.85PST) 铁电陶的合成,具有卓越的室温电热效应.
  • 将TENG和陶集成到一个带有能量收集杯和电路管理模块的系统中,以利用风能和水能.

主要成果:

  • 优化的设备显示了增强的电热效应,达到1.19K (加热) 和0.93K (冷却) 的温度变化.
  • 与之前的工作相比,该系统显著减少了31%的冷却和加热时间,并增加了81%的温度变化.
  • 该设备在一个比陶芯片大300倍的绝缘杯中实现了0.49K的温度变化,以200rpm运行.

结论:

  • 拟议的自动供电温度控制系统,利用旋转TENG和铁电陶,显示出商业化的巨大潜力.
  • 该系统有效地将环境能量 (风,水) 转化为电能,以驱动电热效应,以有效控制温度.
  • 这项研究为开发节能冷却和加热解决方案提供了宝贵的参考,与全球碳中和目标保持一致.