25 MW natural-gas power block · 10 × Rolls-Royce mtu 20V4000 GS

25.18 MW gross from 10 × 2,518 kWe. Capacity basis, battery limit, parts list and delivery scope stated as documented, with unstated figures labelled.

Capacity

Gross: 25.18 MW
With one unit out (N-1): 22.66 MW
Capacity basis: Gross is 25.18 MW at mtu datasheet conditions (95 °F, 328 ft): ten units at the mtu datasheet rating (TD_0944_L64_2518_60_1_EN_US V5). Output falls with ambient temperature and elevation; the radiators are rated to 110 °F ambient at 2,500 ft (packager scope document). No derated figure is published for this block — the engine maker's performance curve is applied to a buyer's stated site conditions.

Configuration

Units: 10 × 2,518 kWe
Technology: recip_gas
Interconnect voltage: 13.8 kV
Frequency: 60 Hz

Battery Limit

Power export: 13.8 kV at the E-house. The buyer owns everything beyond that point — cable, any step-up transformer, and the interconnection. Fuel: gas supply to the block's fuel inlet is the buyer's scope. A step-up transformer can be quoted as an option once the buyer confirms whether the block feeds a grid or a data centre.

Parts List (14)

10 × Rolls-Royce mtu 20V4000 GS gas genset, engine 20V4000L64FNER TR — mtu (Rolls-Royce) · Generation · Included
10 × Stamford alternator, type S9H1DE42Wdg91, 3,427 kVA, IP23, insulation class H, temperature rise F (no dossier yet) — Stamford · Generation · Included
10 × Genset enclosure approximately 10 x 48 x 12 ft with radiators, exhaust silencer, fuel-gas train and lube-oil system (no dossier yet) — Enclosure bop · Included
10 × SCR with standard catalyst and oxidation catalyst, vendor not named (no dossier yet) — Emissions control · Included
1 × 15 kV metal-clad switchgear lineup, 2,000 A, 40 kA, 95 kV BIL, indoor Type 1, non-arc-resistant, maker not named (no dossier yet) — Mv collection · Included
10 × Ten generator breakers, 13.8 kV, 1,200 A, 40 kA drawout vacuum, with SEL-700G generator protection relays (no dossier yet) — Schweitzer Engineering Laboratories · Protection · Included
2 × Two main breakers, 13.8 kV, 2,000 A, 40 kA drawout vacuum, with SEL-751 feeder protection relays (no dossier yet) — Schweitzer Engineering Laboratories · Protection · Included
1 × Bus A / Bus B sectionalizing tie breaker (no dossier yet) — Mv collection · Optional
1 × Station-service transformer, 5.5 MVA, 13.8 kV to low voltage (no dossier yet) — Station service · Included
1 × Zig-zag grounding transformer with neutral grounding resistor branch (no dossier yet) — Grounding · Included
1 × Low-voltage motor control centre and distribution panel for package auxiliaries (no dossier yet) — Lv distribution · Included
1 × mtu MMC and MIP unit controls with master plant controller (no dossier yet) — Controls · Included
1 × E-house housing the 15 kV lineup, station service and plant controller (no dossier yet) — Ehouse · Included
Buyer scope: GSU and distribution beyond 13.8 kV; interconnection application and studies; automatic transfer switching; battery storage or black-start source; fuel infrastructure; field cabling; permits (no dossier yet) — Buyer side · Buyer

Performance and Fuel

Heat rate (LHV): 7,877 Btu/kWh
Heat rate (HHV): 8,728 Btu/kWh
Fuel specification: MTU A001072_02_E
Methane number: 80
Minimum methane content (%): 95
Supply pressure (psi): 2.4 to 3.6 at DN100
Heating value design btu ft3: 969.1 to 1,014.5
Heating value operating btu ft3: 773.0 to 1,062.8 without derating
Duty: Application group 3A, heavy duty, unrestricted
Engine: mtu 20V4000L64FNER TR, lean-burn Otto cycle, V20
Speed rpm: 1,500
Radiator basis: 110 °F ambient at 2,500 ft, 231,000 cfm total airflow
Exhaust full load: 777 °F, 6,024 acfm wet, 28,688 lb/h wet mass flow
Cooling ht circuit: 171 / 198 °F at 453.5 gpm
Cooling lt circuit: 136 / 143 °F at 193.7 gpm
Fuel input at 100 / 75 / 50% load: 19.834 / 15.168 / 10.492 MMBtu/h
Output per unit at 100 / 75 / 50% load: 2,518 / 1,889 / 1,259 kWe
Engine ambient basis: 95 °F combustion air, 328 ft elevation, 79 °F maximum dew point
Total efficiency at 100 / 75 / 50% load: 90 / 90.4 / 90%
Electrical efficiency at 100 / 75 / 50% load: 43.4 / 42.5 / 41%
Exhaust backpressure in h2o: 12 to 24 allowable after the module

Electrical System

Emissions controls: Master plant controller with unit MMC and MIP controllers
Grounding: Zig-zag transformer with neutral grounding resistor branch
Alternator: Stamford UL, type S9H1DE42Wdg91, 3,427 kVA, IP23, insulation class H, temperature rise F
Switchgear: 15 kV metal-clad, 2,000 A bus, 95 kV BIL, 40 kA bracing, indoor Type 1, non-arc-resistant
Power factor: 0.8 inductive to 1.0 capacitive at nominal power
Main breakers: 2 × 13.8 kV, 2,000 A, 40 kA drawout vacuum, SEL-751 protection
Operating mode: Grid-parallel base. Island operation and black start are not in the base scope.
Station service: 5.5 MVA transformer, 13.8 kV primary
Voltage tolerance: 13,800 V ±5%, 60 Hz ±5%
Generator breakers: 10 × 13.8 kV, 1,200 A, 40 kA drawout vacuum, SEL-700G protection
Generator efficiency at 100 / 75 / 50% load: 97.4 / 97.1 / 96.4%

Emissions

Emissions controls: SCR and oxidation catalyst included
Load basis: at or above 50% load
Raw CO (g/bhp-h): < 3.0
Raw NOx (g/bhp-h): < 1.0
Raw VOC (g/bhp-h): < 0.7
Stack outlet guarantees: not defined

Footprint, Weight and Noise

Generating set (in): approximately 280 x 80 x 100
Enclosure (ft): approximately 10 x 48 x 12
Generating set weight (lb): 52,000
Silencer: standard
Radiator attenuation: not stated
Raw engine noise at 1 m (dB(A)): 102