Power density (or volume power density or volume specific power) is the amount of power (time rate of energy transfer) per unit volume.
In energy transformers like batteries, fuel cells, motors, etc. but also power supply units or similar, power density refers to a volume. It is then also called volume power density which is expressed as W/m3.
Volume power density is sometimes an important consideration where space is constrained.
In reciprocated internal combustion engines, power density- power per swept volume is an important metric.
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Famous quotes containing the word power:
“The farmer imagines power and place are fine things. But the President has paid dear for his White House. It has commonly cost him all his peace, and the best of his manly attributes. To preserve for a short time so conspicuous an appearance before the world, he is content to eat dust before the real masters who stand erect behind the throne.”
—Ralph Waldo Emerson (1803–1882)