If I have a system in which I introduce $\mathrm{100~e.u.F}$ (energy units) derived from chemical energy (i.e. fuel) and generate thermal energy to heat water what are e.u. absorbed by water? I.e. the efficiency of the transformation?

Basically I would like to know the "average/general" efficiency of energy transformation for a district heating plant. Considered that the only energy input is fuel and the only energy output is heat (no electricity)?

What are the energy loss?

  • $\begingroup$ This is an interesting question. Usually we are concerned with the efficiency of converting chemical energy to work, with the loss being heat. $\endgroup$ – Ben Norris Aug 3 '13 at 21:47

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