Megawatt | Wikipedia audio article
Channel: wikipedia tts
Date: 02/10/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Watt


00:00:34 1 Examples
00:03:19 2 Origin and adoption as an SI unit
00:05:00 3 Multiples
00:05:30 3.1 Attowatt
00:05:39 3.2 Femtowatt
00:05:49 3.3 Picowatt
00:05:57 3.4 Nanowatt
00:06:15 3.5 Microwatt
00:06:23 3.6 Milliwatt
00:07:09 3.7 Kilowatt
00:07:18 3.8 Megawatt
00:07:47 3.9 Gigawatt
00:07:55 3.10 Terawatt
00:08:11 3.11 Petawatt
00:08:19 4 Conventions in the electric power industry
00:08:49 5 Radio transmission
00:08:57 6 Distinction between watts and watt-hours
00:09:20 7 See also
00:10:16 8 Notes
00:11:37 9 References
00:11:50 10 External links
00:12:23 Terawatt
00:12:32 The terawatt (TW) is equal to one trillion (1012) watts. The total power used by humans worldwide is commonly measured in terawatts. The most powerful lasers from the mid-1960s to the mid-1990s produced power in terawatts, but only for nanosecond time frames. The average lightning strike peaks at 1 terawatt, but these strikes only last for 30 microseconds.
00:13:00 Petawatt
00:13:08 The petawatt (PW) is equal to one quadrillion (1015) watts and can be produced by the current generation of lasers for time scales on the order of picoseconds (10−12 s). One such laser is the Lawrence Livermore's Nova laser, which achieved a power output of 1.25 PW (1.25×1015 W) by a process called chirped pulse amplification.  The duration of the pulse was roughly 0.5 ps (5×10−13 s), giving a total energy of 600 J.  Another example is the Laser for Fast Ignition Experiments (LFEX) at the Institute of Laser Engineering (ILE), Osaka University, which achieved a power output of 2 PW for a duration of approximately 1 ps.Based on the average total solar irradiance of 1.366 kW/m2, the total power of sunlight striking Earth's atmosphere is estimated at 174 PW.
00:14:07 Conventions in the electric power industry
00:14:18 In the electric power industry, megawatt electrical (MWe or MWe) refers by convention to the electric power produced by a generator, while megawatt thermal or thermal megawatt (MWt, MWt, or MWth, MWth) refers to thermal power produced by the plant. For example, the Embalse nuclear power plant in Argentina uses a fission reactor to generate 2109 MWt (i.e. heat), which creates steam to drive a turbine, which generates 648 MWe (i.e. electricity). Other SI prefixes are sometimes used, for example gigawatt electrical (GWe). The International Bureau of Weights and Measures, which maintains the SI-standard, states that further information about a quantity should not be attached to the unit symbol but instead to the quantity symbol (i.e., Pthermal
00:15:14 270 Wth) and so these units are non-SI. In compliance with SI the energy company DONG Energy uses the unit megawatt for produced electrical power and the equivalent unit megajoules for delivered heating power in a combined heat and power station such as Avedøre Power Station.When describing alternating current (AC) electricity, another distinction is made between the watt and the volt-ampere. While these units are equivalent for simple resistive circuits, they differ when loads exhibit electrical reactance.
00:15:47 Radio transmission
00:15:57 Radio stations usually report the power of their transmitters in units of watts, referring to the effective radiated power.  This refers to the power that a half-wave dipole antenna would need to radiate to match the intensity of the transmitter's main lobe.
00:16:15 Distinction between watts and watt-hours
00:17:42 energy / time1 terawatt hour per year
00:18:27 See also



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SUMMARY
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The watt (symbol: W) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer. In dimensional analysis, power is described by 
  
    
      
        
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