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Physicists, help me understand this:
If they’re referring to power, the unit should be KW, right?
And if they’re referring to energy consumed (in some interval of time), then it should be KW⋅h (not KW/h). Right?
(And if so: the quantity is meaningless unless you specify the interval of time. eg: “400 KW·h on an average day”. No? I mean, my smartphone also consumes 400 KW·h… if I use it for long enough!)
@tripu
It does appear like a lot, maybe they meant the daily average, but then as you say the sign is really misleading
The unit for “energy consumption for [period of time]” should be an energy unit, like joule or kcal. Or even KW·h.
So you could say any of this:
- “The lift consumes 10 J every hour”
- “The lift consumes 25.6 KW·h per hour”
- “The lift consumes 0.3 J / h”
- “The lift consumes 981 KW·h / h”
But not: “the lift consumes 400 KW / h”.
Right?
@tripu
Right, an assumption was made
@tripu
I would interpret it as the energy consumption for one hour of operation
Thus if you use the elevator for one hour you're consuming 400 kW/h
Or maybe the people who were writing the sign had no idea what they were talking about