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相关概念视频

Electric Generator: Alternator01:25

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Electric generators induce an emf by rotating a coil in a magnetic field. A simple alternator is an AC generator that creates electrical energy that varies sinusoidally with time. A simple alternator consists of a conducting loop that is placed inside a uniform magnetic field. The loop is connected to split rings connected to the external circuit with the help of brushes.
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Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
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An alternator converts mechanical energy into electrical energy that varies sinusoidally, resulting in AC current. Meanwhile, a DC generator converts mechanical energy into electrical energy, which are DC pulses with the same polarity. The construction of a DC generator is similar to that of an alternator, except that the pair of slip rings is replaced by a single split ring, also called a commutator. The commutator functions like a periodic rotary switch; it changes the contacts with the...
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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.
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Using electric appliances for a longer period of time consumes more electrical energy and results in a higher electric bill. The energy produced by the transfer of electrons from one point to another is known as electrical energy. If power is delivered at a constant rate, the electrical energy can be defined as the product of power used by the device for a period of time. The energy unit on electric bills is the kilowatt-hour, where one kilowatt-hour is equivalent to 3.6 × 106 joules.
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A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
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水-三电电化-补充湿度电气发电机

Fangzhou Li1, Jian Zhao1, Bin Li1

  • 1School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.

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概括

这项研究引入了一台混合发电机,可以从水滴中收集水分和 triboelectric 能量. 这种创新的设备为便携式电子设备和应急系统提供高功率输出,即使在恶劣的环境中.

关键词:
混合动力发电机是混合动力发电机.水电装置的水电装置.湿电薄膜发电机 湿电薄膜发电机带电纳米发电机的 triboelectric 的使用.水的能量水的能量

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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
  • 可再生能源可再生能源是可再生能源.

背景情况:

  • 湿气发电机 (MEGs) 对供电设备有希望,但其输出低.
  • 将MEG与其他能源采集方法相结合,很少被用于高功率发电.
  • 现有技术在现实应用中面临挑战,特别是在各种环境条件下.

研究的目的:

  • 开发一台灵活高效的混合发电机,将水分和 triboelectric 能量收获结合起来.
  • 通过使用新型材料,证明从水滴中同时产生能量.
  • 供电实际应用,如光学报警器和无线通信系统.

主要方法:

  • 使用酸 (CA) 介导的多聚胺酸 (PGA) 水凝用于MEG和多孔电极扩展聚二乙烯 (E-PTFE) 用于 triboelectric 发电机 (TEG) 的混合发电机的制造.
  • 使用防水E-PTFE薄膜进行高效的 triboelectrification,并促进水蒸气的转移.
  • 在水滴冲击下和恶劣环境条件下 (5°C,盐水) 测试发电机的性能.

主要成果:

  • 混合发电机从MEG获得0.55V的直流电压和120μA cm-2的峰值电流密度.
  • 同时,TEG侧产生了300V的交流输出电压和400μA的电流.
  • 该设备在低温和盐水下可靠运行,证明了其强度.

结论:

  • 开发的混合发电机有效地从水滴中同时收集水分和 triboelectric 能量.
  • 这项技术为供电便携式电子产品,物联网设备和紧急通信系统提供了高输出解决方案.
  • 这些发现为实际应用在自然环境中采集多种能源提供了宝贵的见解.