Editing Chemfuel powered generator

{{infobox main|building|
| name = Chemfuel powered generator
| image = Chemfuel_powered_generator.png|128px
| description = Produces power by consuming chemfuel. Must be periodically refueled by hand.
| type = Building
| type2 = Power
| placeable = true
| path cost = 50
| passability = pass through only
| blockswind = true
| cover = 1
| minifiable = false
| size = 2 ˣ 2
| flammability = 1
| hp = 300
| beauty = -20
| power = 1000
| glowradius = 6
| glowcolor = (80, 112, 180)
| heatpersecond = 6
| terrain affordance = medium
| research = Electricity
| skill 1 = Construction
| skill 1 level = 6
| work to make = 2500
| resource 1 = Steel
| resource 1 amount = 100
| resource 2 = Component
| resource 2 amount = 3
}}
{{info|The '''chemfuel powered generator''' produces [[power]] from [[chemfuel]]. The generator is an exact analog to the [[wood-fired generator]], only the type of fuel is different.}}

== Acquisition ==
Chemfuel powered generators can be constructed once the [[Research#{{P|Required Research}}|{{P|Required Research}}]] research project has been completed. They require {{Required Resources}}, {{Ticks|{{P|Work To Make}}}} of work, and a [[{{P|Skill 1}}]] skill of {{P|Skill 1 Level}}.

Once constructed, a chemfuel generator cannot be moved, it can only be deconstructed.

==Summary==
The chemfuel powered generator consumes {{icon small|chemfuel}} 4.5 [[chemfuel]] per day and generates a constant 1000W as long as it is switched on and fueled. It can hold up to 30 fuel at a time, for a maximum run time of 6.66 days. Fuel consumption is not dependent on how much power is actually drawn.  Fuel has to be delivered to the generator by a [[Work#Haul|hauler colonists]]. It can be switched off; in the off state it will neither consume fuel nor produce power. 

==== Light & heat ====
It outputs [[light]] in a 6 tile radius, with the nearest {{P|Light Radius}} tiles being above 50% light level and considered lit.  Note that the light source is centered at the bottom-left tile of the generator, rather than the "true" center of the generator. 

It heats at a rate of 6 heat per second{{Check Tag|Exact mechanic unclear|Provides comparison with other heat sources but doesn't explain how much it actually heats}}. Unlike many other heat sources, it does not appear to have a maximum temperature and will continue to heat up rooms indefinitely.{{Check Tag|Confirmation needed}}.

==== Explosion ====
If it is damaged below one third of its hitpoints, or {{#expr: {{P|Max Hit Points Base #}}/3}} HP, it has a chance{{Check Tag|What chance?}} to explode. The generator will spark and emit a hissing sound shortly before exploding between {{ticks|70}} and {{ticks|150}} later. The explosion deals 10 [[Damage Type#Flame|Flame]] damage in a radius around itself that depends on the quantity of fuel in the generator. At 0 fuel, the explosion has a radius of 0 and only destroys the generator, and expanding this radius proportional to the square root of the fuel times 0.95 up to a maximum radius of {{#expr: 0+((30*0.95)^0.5) round 2}} tiles when fully fueled. This explosion leaves [[Filth|Chemfuel puddles]] which will then ignite and burn.

==Analysis==
Chemfuel generators are compact, can be placed anywhere, and offer a consistent source of power, making it one of the easiest generators to use. Most other power sources ''scale'' much worse; due to their scarcity or space constraints, using large quantities will quickly become difficult.

However, generators require maintenance, both to create the chemfuel and to actually refuel the generator. The exact amount of work depends on which source of chemfuel is used - [[infinite chemreactor]]s are very limited, but require no work to create. Many colonies will have to research [[Research#Biofuel refining|Biofuel Refining]] to actually make some. 

In general, any source of chemfuel is less work than what a [[wood-fired generator]] would take. The workload is reasonably low, so using chemfuel does not bring excessive burden to a colony.

==Fuel economy==
===Using wood for fuel===
With a [[biofuel refinery]], chemfuel generators consume {{icon small|wood}} 9 [[wood]] of chemfuel per day, less than a [[wood-fired generator]]'s {{icon small|wood}} 22 per day. Both generators produce the same amount of power. Converting wood to chemfuel takes work, but harvesting wild trees takes longer when considering the time to walk and haul. When cultivating your own plants, using [[corn]] takes much less work than growing trees. Note that the refinery itself requires 170 W of power, but you only need 1 refinery for many generators. In specific:

*Converting wood to chemfuel takes {{ticks|2000}} of work for 7.78 days of fuel, or {{ticks|257}} for 1 day of fuel.
*Just harvesting the wood depends on [[biome]], growth of the tree, and Plants skill.
**With a skill of 8, it takes a ballpark of {{ticks|260}} of work to harvest {{icon small|wood}} 9 [[wood]], for a fully grown, non-cactus tree.
**For reference, it takes a ballpark of {{ticks|660}} of work to harvest {{icon small|wood}} 22 [[wood]].
*When considering tree cutting, note that you will need to go further and further to cut more trees.

Sowing a single tree takes {{ticks|4000}} of work, which makes them much less efficient than any food crop. [[Fibercorn]]{{IdeologyIcon}} is less efficient than regular [[corn]], too.

=== Using boomalopes for fuel ===
A [[boomalope]] produces, at most, {{icon small|chemfuel}}{{#show:Boomalope|?Daily Milk Average#}} chemfuel per day. This takes {{ticks|400}} of work before modifiers. This is enough to fuel ~{{#expr:{{#show:Boomalope|?Daily Milk Average#}}/4.5 round 2}} generators, which in practice means 2 generators per day.

In theory, a herd of 9 boomalope can fuel {{#expr:{{#show:Boomalope|?Daily Milk Average#}}/4.5*9 round 1}} generators indefinitely. However, milking is not an instant process, so it is difficult to reach an optimal amount.

=== Using the Infinite Chemreactor ===
The [[Infinite chemreactor]] is a world quest item that generates {{icon small|chemfuel}}75 chemfuel every ten days (effectively {{icon small|chemfuel}}7.5 chemfuel per day) at a cost of 300 watts and no work. This is more than enough to power a single chemfuel powered generator, providing a net +700 watts of power, while leaving {{icon small|chemfuel}}30 chemfuel after a 10 day cycle (an average of 3 excess/day). 3 infinite chemreactors are exactly enough to power 5 chemfuel generators, providing an excess of 4,100 watts of power (5,000w -900w).

Assuming a small buffer of chemfuel to start, this ''is'' easily attainable, because the supply side is reliable, and refueling can be done well in advance.

=== Growing plants for fuel ===
Chemfuel generators together with hydroponics greenhouses and biofuel refineries produce a significant net energy profit, if the colonist workforce is available to run the setup.  The (simplified) conversion chain is
 ''Power'' (for greenhouse) → ''food'' (for refinery) → ''chemfuel'' (for generator) → ''power''
A lot of excess power is generated at the end of the chain.

A single [[hydroponics basin]] can produce ~{{#expr:4*{{#show:Rice plant|?Harvest Yield Per Day (280)#}}*0.05 round 2}} raw nutrition per day (growing rice, and assuming a perfect grow operation).  This converts into ~{{#expr:{{#vardefineecho:chemfuel_per_basin_per_day|{{#expr:4*{{#show:Rice plant|?Harvest Yield Per Day (280)#}}*0.05*10 }}}} round 1}} chemfuel per day at a [[biofuel refinery]].  Therefore, the produce from a single basin fuels about {{#expr:4*{{#show:Rice plant|?Harvest Yield Per Day (280)#}}*0.05*10/4.5 round 1}} chemfuel generators.  This is not attainable in practice, but will serve as a guideline.  Theoretically, a single hydroponics basin lit by a sun lamp (in a group of 24 basins) uses 130W of power on average, including the sun lamp (190W if you assume day-time power draw).  This results in a theoretical net gain in energy of about 870W (810W during the day) per dedicated hydroponics basin.  However, the power draw of the refinery is not taken into account (it can be micro-managed if chemfuel is produced in batches, and will not play a big role in the overall economy).

With adequate batteries to handle the day-night cycle of [[Sun lamp|sun lamps]], {{#expr:{{#vardefineecho:generators_needed_for_hydroponic_setup|{{#expr:(24*-{{#show:Hydroponics basin|?Power Consumption#}} + 0.5*-{{#show:Sun lamp|?Power Consumption#}})/{{#show:{{PAGENAME}}|?Power Consumption#}}}}}} round 1}} generators are needed to power a full hydroponics setup, which will require ~{{#expr:{{#var:generators_needed_for_hydroponic_setup}}*4.5 round 1}} chemfuel per day, or about {{#expr:{{#vardefineecho:chemfuel_dedicted_basins_needed|{{#expr:{{#var:generators_needed_for_hydroponic_setup}}*4.5/{{#var:chemfuel_per_basin_per_day}}}}}}round 1}} hydroponics basins dedicated to producing rice to turn into chemfuel.  This means that with {{#expr:ceil({{#var:generators_needed_for_hydroponic_setup}})}} generators, you can grow plants in {{#expr:floor(24 - {{#var:chemfuel_dedicted_basins_needed}})}} of the 24 hydroponics basins for free, with an average of {{#expr:(ceil({{#var:generators_needed_for_hydroponic_setup}}) - {{#var:generators_needed_for_hydroponic_setup}})*{{#show:{{PAGENAME}}|?Power Consumption#}}}}W of power spare. Note that this assumes 100% harvest efficiency - as harvest efficiency decreases at higher difficulties, the number of basins that must be dedicated to chemfuel production will increase in direct proportion.

Corn can also be grown to feed chemfuel generators, with {{#expr:4.5*2/{{#show:Corn plant|?Harvest Yield Per Day (100)}} round 1}} tiles of [[corn plant]] in 100% fertility soil needed for each generator.

== Version history ==
* Beta 18 - Added.
* [[Version/1.1.0|1.1.0]] - Refueling is now toggleable.

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