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Resource efficiency with useful heat or electricity: Difference between revisions
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Resource efficiency with useful heat or electricity (view source)
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[[Category:English]] | [[Category:English]] | ||
One way to determine which energy source is best for the environment is to assess the benefit in the form of heat or electricity a power | One way to determine which energy source that is best for the environment is to assess the benefit in the form of heat or electricity a power source can provide. The tables below can be read as 1 unit of fuel provides x heating and y electricity. Higher number is better. | ||
Note that "useful heat out" greater than 100 means that the end result is more heat energy than if the fuel were burned directly for heating. | Note that "useful heat out" greater than 100 means that the end result is more heat energy than if the fuel were burned directly for heating. | ||
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{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
! Power source<br> 100% in!! % Electricity out!! % | ! Power source<br> 100% in!! % Electricity out!! % Heat out!! % Useful heat out <br>with HP COP 4 !! Net effect electricity contribution<br>by % of fuel energy in | ||
|- | |- | ||
|Direct combustion for | |Direct combustion for heating <br>(wood burning, pellets, oil, gas) || 0 || 100 || 100 || 25 | ||
|- | |- | ||
| Internal combustion engine with gas/liquid fuel <br>([[Gen set]])|| 35|| 0 || 140 || 35 | | Internal combustion engine with gas/liquid fuel <br>([[Gen set]])|| 35|| 0 || 140 || 35 | ||
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|} | |} | ||
===Electric car compared to ICE petrol car === | |||
An electric car cuts carbon dioxide emissions in half compared to a petrol car if the electricity is produced with petrol. | An electric car cuts carbon dioxide emissions in half compared to a petrol car if the electricity is produced with petrol. | ||
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{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
! Power | ! Power source<br> 100% in!! % Electricity out!! % Heat out!! % Useful heat out <br>with HP COP 4 !! Net effect electricity contribution<br>by % of fuel energy in | ||
|- | |- | ||
|Direct combustion for heat <br>(wood burning, pellets, oil, gas) || 0 || 100 || 100 || 25 | |Direct combustion for heat <br>(wood burning, pellets, oil, gas) || 0 || 100 || 100 || 25 | ||
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{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
! Power | ! Power source<br> 100% in!! % Electricity out!! % Heat out!! % Useful heat out <br>with HP COP 4 !! Net effect electricity contribution<br>by % of fuel energy in | ||
|- | |- | ||
|Direct combustion for heat <br>(wood burning, pellets, oil, gas) || 0 || 100 || 100 || 25 | |Direct combustion for heat <br>(wood burning, pellets, oil, gas) || 0 || 100 || 100 || 25 | ||