1.
Caneri wrote:it's 10,000 watts or 10kW/h
As someone who was educated/trained/worked in Engineering...
If I can still remember...My old brain tends to fail to remember all that detail.
My understanding is...
(a) Watts are a RATE...
Like a flow rate...[e.g. gallons per minute]
Or a rate of production or usage.
(b) kW-hrs [there is no such thing as kW/hr]...
Is a QUANTITY.
(c) e.g. If you use electrical energy [Joules] at the rate of 10,000 Watts...
i.e. 10,000 Joules per second.
And you do that for 1 second...
You will have used 10,000 Joules = 10,000 watt-seconds
[A Watt is a Joule per second, a Joule is a Watt-second, i.e. a Watt expended for 1 sec]
(d) 10 kW-hrs = 10,000 watt-hours = 10,000 x 3,600 = 36,000,000 watt-seconds = 36,000,000 Joules = 36 Mega-Joules = 36 MJ.
And...
2.
Caneri wrote:So it should do 10,000 watts every hour
(a) Imagine cars travelling past a given point on a motorway:
Lets say there were 10,000 cars passing every hour.
And I invented a name for the RATE at which cars were flowing/passing.
Lets say cars-per-hour = cph.
[Like the name "watts" in the case of electricity]
Then I shouldn't say there are 10,000 cph every hour...
Unless what I mean is that there is a constant rate of flow...
It's the same every hour.
Only then might I reasonably say the there are 10,000 cph...
Not just this hour...
Or that hour...
But EVERY HOUR.
Actually, its every minute, of every hour, of every day, of every month, of every year.
Why choose to mention hours alone?
Doesn't make sense.
What you'd normally say is...
That the flow rate is a fairly constant/unvarying 10,000 cph.
(b) And one-hour of flow at 10,000 cph-hour =10,000 cars.
i.e. A total flow of 10,000 cph over the period of a single hour...
Is a total flow [which is a quantity not a RATE] of 10,000 cars.
2. Does that lot make any sense?