This diagram is nonsensical, because it sets the moisture content of wood in relation to "KW", which is a measure of (continuous) power output. It would make sense to set moisture content in relation to usable energy content in Joule, but then the numbers would be 1000x greater. Bottom line: Whatever the diagram is trying to convey does not make any quantitative sense.
- While the graph shows only approximate numbers, it does seem to be simply mislabeled rather than nonsensical.
- The graph shows 4.5kWh of heating content for dry wood, as referred to in:
- http://en.wikipedia.org/wiki/Wood_fuel
- The heating value of moist wood is lower, partly due to the need to boil the water content, which alone could require a third of a kWh for a half-kilogram of moisture in (very) wet kilogram of wood.
- http://en.wikipedia.org/wiki/Heat_of_combustion
- http://en.wikipedia.org/wiki/Water#Chemical_and_physical_properties
- Ducts (talk) 16:48, 1 July 2012 (UTC)
Comments
edit
KW, kiloWatt is a rate, not an amount of energy. Is it kW-hr?
- It should be a rate. Regardless of moisture content, the wood has the same total stored energy, because it still contains the same amount of burnable material. However, the presence of water will cause the burn rate to differ. Thus, kW, not kWh.
