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Speak Correctly: A / H Or KW / H - What Is The Difference?

2024

Video: Speak Correctly: A / H Or KW / H - What Is The Difference?

Video: Speak Correctly: A / H Or KW / H - What Is The Difference?
Video: What is a kilowatt hour? Understanding home energy use 2024, March
Speak Correctly: A / H Or KW / H - What Is The Difference?
Speak Correctly: A / H Or KW / H - What Is The Difference?
Anonim
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Speak correctly: there are no automatic transmissions, alas! The champion among modern technical stupidities in the frequency of use on sites and in advertising is ampere divided by an hour. For some reason, every second "battery" site measures the energy supply in batteries in these units: Ah / h! However, another similar stupidity is now in fashion: kW / h. In such units, ignoramuses of different stripes from time to time try to measure either power or energy consumption.

How, for example, to understand this passage: “The new engine has a power of 60 kW / h”? Or like this: “The new installation consumes only 500 kW”?

Those who really do not want to wander in three electric pines, we recall the following:

Power is measured in watts (W).

The energy W. is measured in joules (J). In addition, it is often measured in kilowatt hours (kWh).

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Speak correctly: which is more powerful - the engine or power unit? Power is the work that a device can do per unit of time. If the lamp has a power of 100 W, then it will not change in an hour or a year. If you want to figure out how much you have to pay for the energy that such a lamp eats, you need to multiply its power by the time it works. If we are talking, for example, about days, then we get 2.4 kWh. Estimate the cost of one kilowatt hour - and you can pay.

But what happens if you divide the power by time, nobody knows …

Approximately the same applies to the inscriptions A / h on batteries. Remember: 1C = 1A × 1s. In other words, the current strength, measured in amperes, is the speed of coulombs carried along wires. What the inscription A / h means, no one can explain. Maybe some acceleration of charges? But some people sincerely believe that in such units they measure … battery capacity!

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