Reply to post: Re: STEM question

Full shift to electric vans would melt Royal Mail's London hub, MPs told

Ken Moorhouse Silver badge

Re: STEM question

IMHO the conversion of energy into electricity is a universal common denominator, not necessarily the most efficient way to do things, but arguably the most pervasive. The reason is that it is easier to handle than many other types of fuel. The method of transmitting electricity from one place to another can be made more cost-effective by converting from one form of electricity to another. AC electricity has advantages in some cases, DC has advantages in others. Similarly high voltage is preferable in some applications, low voltages in others. A typical application where both DC and AC is used is for rail transport systems. Here is a link discussing this:-

http://www.railjournal.com/index.php/rolling-stock/traction-choices-overhead-ac-vs-third-rail-dc.html

As consumers it is important that our household appliances do not need to be changed every time the generating company switches from one fuel to another. Who remembers the upheaval when British Gas moved from coal gas to north sea gas? See Changeover to natural gas in this link:-

https://en.wikipedia.org/wiki/Coal_gas

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