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The Coal Generator is a power generator building that generates power by burning  Coal,  Compacted Coal or  Petroleum Coke and  Water. It is the first fully automate-able power source the pioneer has access to and also the first power source to use a mined resource.

One Coal Generator produces 75 MW at 100% clock speed.

Fuel consumption[]

At 100% clock speed, one Coal Generator consumes 45 m3 Water/min, no matter what fuel is used.

This means 3 Water Extractors will produce enough water for 8 Coal Generators, provided the 300 m3/min throughput limit of the Mk.1 Pipeline isn't exceeded. (See the 3:8 schematic at the bottom image for recommended configuration)

Fuel type Energy (MJ) Stack size Stack energy (MJ) Burn time (sec) Items per minute
 Coal 300 100 30,000 4 15
 Compacted Coal 630 100 63,000 8.4 7.143
 Petroleum Coke 180 200 36,000 2.4 25

Generators per Coal node[]

A 100% Miner on a Coal node can support the following number of Coal Generators operating at 100% power usage (decimal amounts of machines means that the last machine needs to be underclocked for maximum efficiency):

Miner Node
purity
Coal/min Water Extractors
(@ 100%)
Water Extractors
(@ 75%)
Water m3/min No. of
Coal Generators
Gross power
Mk.1 Impure 30 0.75 1 90 2 150 MW
Normal 60 1.5 2 180 4 300 MW
Pure 120 3 4 360 8 600 MW
Mk.2 Impure 60 1.5 2 180 4 300 MW
Normal 120 3 4 360 8 600 MW
Pure 240 6 8 720 16 1200 MW
Mk.3 Impure 120 3 4 360 8 600 MW
Normal 240 6 8 720 16 1200 MW
Pure 480 12 16 1440 32 2400 MW

A 250% Miner on a Coal node can support the following number of Coal Generators operating at 100% power usage (decimal amounts of machines means that the last machine needs to be underclocked for maximum efficiency):

Miner Node
purity
Coal/min Water Extractors
(@ 100%)
Water Extractors
(@ 75%)
Water m3/min No. of
Coal Generators
Gross power
Mk.1 Impure 75 1.875 2.5 225 5 375 MW
Normal 150 3.75 5 450 10 750 MW
Pure 300 7.5 10 900 20 1500 MW
Mk.2 Impure 150 3.75 5 450 10 750 MW
Normal 300 7.5 10 900 20 1500 MW
Pure 600 15 20 1800 40 3000 MW
Mk.3 Impure 300 7.5 10 900 20 1500 MW
Normal 600 15 20 1800 40 3000 MW
Pure 780 1200 19.5 26 2340 52 3900 MW

Use the following equations:
Number of Coal Generators required:
Coal generator = Coal mining rate / 15
Number of Water Extractors required:
Water extractor = Coal generator / 2.6666
Spread out the water supply across multiple pipelines as following:
Pipelines required = Coal generator / 6.6666

  • Coal burn time is four seconds, which means that a single Coal Generator consumes 15 Coal/min.
  • Pipeline Mk.1s only have a capacity of 300 m3/min. Thus, when connecting Water Extractors to a line feeding seven or more Coal Generators, Water inputs either need to be spaced out or be separated.
    • Alternatively, underclock Water Extractors to 75% and connect each of them to exactly two Coal Generators. That way, the number of Water Extractors is half the number of Coal Generators.
    • Using Water Extractors underclocked to 75% require an additional extractor for every eight Coal Generators, trading space for ratio simplicity. For eight Coal Generators you either need three Water Extractors at 100% (3*20 = 60 MW) or four Water Extractors at 75% (12.6 * 4 = 50.4 MW). This can be useful early on when you still need to save up on energy consumption on Water Extractors.
    • A Water Extractor has about the same width as two Coal Generators so it would be easier to tile the layout.
  • Pipeline Mk.2s have a capacity of 600 m3/min. Thus up to 13 Coal generators and 5 Water Extractors can be connected to a single Mk.2 Pipeline.
  • A Miner Mk.3 on a pure Coal node should only be overclocked to 163%, due to the throughput limit of Mk.5 conveyors.
  • As the Miner and Water Extractors consume power, the net power capacity is less.
    • Water Extractors use about 10% of the gross Power generated. After subtracting 10% from the gross Power, subtract the Power consumption from the Miners, Pipeline Pumps, vehicles, etc. to calculate the net power produced.

Generators fueled by Compacted Coal[]

This is a simplified version of the table above that do the same calculations for Compacted Coal as input, so only 7.143 items per minute instead of 15 are needed.

Each Assembler operates at 25 parts per minute.

Coal and Sulfur/min No. of
Assemblers (@100%)
Compacted Coal/min Water Extractors
(@100%)
No. of
Coal Generators
Gross power
60 2.4 60 3.15 8.4 630 MW
120 4.8 120 6.3 16.8 1260 MW
240 9.6 240 12.6 33.6 2520 MW
480 19.2 480 25.2 67.2 5040 MW
780 31.2 780 40.95 109.2 8190 MW

Generators fueled by Petroleum Coke[]

Burning Petroleum Coke for power can be a great way to deal with Heavy Oil Residue, as long as overflow is handled (to prevent the Coke from backing up, which would result Heavy Oil Residue backing up and subsequently Plastic or Rubber production stopping). One Coal Generator consumes 25 Coke per minute at maximum utilization.

As the amount of Heavy Oil residue can vary significantly based on what recipes are used, the table below only calculates with Heavy Oil Residue and not Crude Oil.

Heavy Oil Residue/min No. of
Coke Refineries
Petroleum Coke/min Water Extractors
(@100%)
No. of
Coal Generators
Gross power
40 1 120 1.8 4.8 360 MW
100 2.5 300 4.5 12 900 MW
120 3 360 5.4 14.4 1080 MW
200 5 600 9 24 1800 MW
260 6.5 780 11.7 31.2 2340 MW
300 7.5 900 13.5 36 2700 MW
400 10 1200 18 48 3600 MW

Overclocking[]

Main article: Clock speed
  • The Coal Generator, like all power generation buildings, behaves differently to power consumer buildings when overclocked. A generator overclocked to 250% only operates 202.4% faster.
  • As the fuel and Water consumption rate is directly proportional to generator power production, verify that demand matches the production capacity to ensure that Power Shards are used to their full potential. Fuel efficiency is unchanged, but consumption and power generation rates may be unexpectedly uneven.

Coal power setup tutorial[]

See the pages below for guides. The guide is written based on Rocky Desert starting area, but can also be applicable for other areas with four Coal nodes and with Water nearby.

External link[]

Gallery[]

History[]

  • Patch 0.3.8.2: Fixed Fluid indicator UI not displaying properly in the Coal Generator
  • Patch 0.3: Now requires Water to operate, appearance changed accordingly to include a Pipeline input. The chimney is now fully within the hitbox.

See also[]


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