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What is the symbol for active energy

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rikotech8

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What standard symbol stands for active energy?
For example:
P stands for active power
Q stands for reactive power
S stands for apparent power
than what symbol stands for active energy (kWh)?
Excuse my bad English.
 

Energy, E is in many forms relating to mass, speed, electrical, mechanical etc.

1 Joule (J) is the MKS unit of energy, equal to the force of one Newton acting through one meter.
1 J = 1 Ws {watt-second}
or in other words 1 Watt= one Joule of energy per second.

so E(t)=P(t)*t (real-time product average) for E in Joules and P in Watts and time in seconds

or simply E=P*t but for utility industry they will use a more suitable scale. like MWh
 
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Watt-seconds or joules, their is no descriptor per-se for active energy, except perhaps watts which is real power, or real joules per second doing something useful, i.e.motive work or heating...
 
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when energy changes form work has been done. work is active.. so you need a symbol not for energy, but for the changing form of energy.
 

Hi,

It could be E or W.

Klaus
 

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