How to 转换 电气 power in watts (W) to energy in kilojoules (kJ).
You can 计算 kilojoules from watts and seconds, but you can't 转换 watts to kilojoules since watt and kilojoule units represent different quantities.
The energy E in kilojoules (kJ) is equal to the power P in watts (W), times the 时间 period t in seconds (s):
E(kJ) = P(W) × t(s) / 1000
So
kilojoules = watts × seconds / 1000
or
kJ = W × s / 1000
求 the energy consumption of an electrical circuit that has power consumption of 300 watts for 时间 duration of 3 seconds
E(kJ) = 300W × 3s / 1000 = 0.9kJ
