Large Turbine

The Large Turbine  is a multiblock generator in GregTech 5 Unofficial producing large amounts of EU. They come in 4 variants, Steam, High Pressure, Gas and Plasma. The amount of Steam/Gas/Plasma used depends on the Turbine build in. It slowly speeds up, so it should be used for constant Energy supply.

The main Turbine block changes the fluids the turbine can run with.
 * A Large Steam Turbine runs with Steam and IC2 Steam.
 * A Large High Pressure Turbine runs with Superheated Steam from IC2(Can also be produced with Large Heat Exchanger).
 * A Large Gas Turbine runs with Methane, Hydrogen and Biogas.
 * A Large Plasma Generator runs with all types of plasmas generated in the Fusion Reactor.

The Large Turbine also requires a turbine rotor. Turbine rotors vary greatly in size and material and contribute efficiency, durability and optimal flow modifiers to the running of the turbine.

Durability: About every 3000 ticks, the turbine takes 20% of the EU/t generated damage. In the Plasma Generator the damage is EU/t^0.7.

Efficiency: A percentage factored into the power output of the turbine.

Optimal Flow: How much steam/gas/plasma/lava is required to attain ideal power production

Building the Multiblock




In the back comes a Dynamo Hatch with at last the voltage the turbine will produce.

In the sides come 1 or more Input Hatches, 1 Maintainance Hatch, in case of Steam or High Pressure turbine a Output Hatch, and the Gas Turbine needs a Muffler Hatch.

The remaining sides get filled up with Turbine Casings. The two center blocks remain air blocks. The 9 Blocks in front of the Turbine also must be air blocks.

After that, a Turbine must be placed in the top-right slot in the turbine gui. After fixing the maintainance issures in the maintainance hatch, the turbine starts after a hit with an soft hammer.

Math
Optimal Flow and Nominal Output

Optimal Flow is the flow rate required to achieve optimal output for the turbine. Each turbine rotor has a specific optimal flow rate, which is further defined by the type of turbine it is installed in (Steam vs HP Steam vs Gas vs Plasma). It is important to understand that the "Optimal Steam Flow" displayed on the tooltip for a Turbine Rotor is specific to the Large Steam Turbine. Optimal Flow for all Large Turbine types (including Steam) is calculated as:

Optimal Flow = Nominal Output / Fuel Value​

Nominal Output

To determine nominal flow rate, the actual nominal output must first be determined. Each Large Turbine type has a multiplier to the stated (tooltip) Optimal Steam Flow which is used in the calculation.

Nominal Output Examples (Flow is divided by 20 to get the rate in volume per tick instead of volume per second)
 * A Large Steam Turbine using a "10000L/sec" turbine item has a nominal output of (10000/20) / 2 = 250 EU/t.
 * A Large Gas Turbine using a "10000L/sec" turbine item has a nominal output of (10000/20) = 500 EU/t.
 * A Large Plasma Turbine using a "10000L/sec" turbine item has a nominal output of (10000/20) * 40 = 20000 EU/t.
 * A Large Plasma Turbine using a "40000L/sec" turbine item has a nominal output of (40000/20) * 40 = 80000 EU/t.

Fuel Values (not all listed)

Calculation Using Optimal Flow = Nominal Output / Fuel Value

Steam: (10000 / 2) / (0.5) = 10,000 L/s or 500 L/t

Biogas: (10000) / (32) = ~312 L/s or ~16 L/t

Helium Plasma: (10000 * 40) / (4096) = ~98 L/s or ~5 L/t

Efficiency A turbine's actual output is Nominal Output * Efficiency% / 100. A turbine can work with up to 150% of its optimal flow, but no power will be generated from the surplus. If supplied with less, the turbine will still run, but an additional efficiency modifier will be applied to the output as FlowEfficiency = ActualFlow / OptimalFlow.

Therefore A Large Gas Turbine using a "10000L/sec 110% Efficiency" turbine rotor has a actual output of (10000/20) * 1.10 = 550 EU/t.

Spin Up / Spin Down Large Turbines have a spin up time of 50 seconds and slow down over a period of 10 seconds, at which point they are not operating at full efficiency.