| 1 | Small Natural-Gas Standby Set
Spark-ignited, liquid-cooled package | 30–100 kWe | Pipeline natural gas
Optional propane or LPG configuration | Small commercial buildings, clinics, retail facilities, telecommunications sites, farms, and residential backup power. | Approximately 28–36% | Level concrete foundation, outdoor weatherproof enclosure or ventilated plant room, automatic transfer switch, exhaust routing, combustion-air openings, and safe gas shut-off valves. Allow clearance for radiator airflow and maintenance access. | Stable gas pressure, clean and dry fuel, suitable methane number, and a properly sized gas train with pressure regulation and leak protection. | Confirm local electrical installation rules, standby-power requirements, noise limits, gas-piping codes, fire separation, and emissions limits. In the United States, stationary engines may fall under EPA rules such as NSPS JJJJ depending on size, fuel, and operating status. | Compact footprint, fast automatic backup operation, and relatively simple fuel storage requirements compared with diesel systems. |
| 2 | Commercial Gas CHP Set
Combined heat and power package | 150–500 kWe | Natural gas
Renewable gas may be used after treatment and verification | Hotels, hospitals, universities, office complexes, supermarkets, sports centers, and district heating substations with year-round thermal demand. | Approximately 35–42% | Provide a heat-recovery loop, plate heat exchanger, circulation pumps, expansion vessel, flue-gas system, acoustic treatment, ventilation, and controls that coordinate electrical and thermal loads. A heat sink is required when recovered heat cannot be used. | Gas pressure and composition must remain within the engine manufacturer's limits. Include filtration, condensate management, gas detection, and isolation valves. | Check local CHP permitting, building and pressure-vessel rules, grid-parallel interconnection requirements, sound limits, and emissions permits. European projects may also need to address applicable EU emissions, ecodesign, electrical, and gas-appliance requirements as implemented nationally. | High total fuel utilization, often reaching approximately 75–90% when useful heat is fully recovered. |
| 3 | Medium Industrial CHP Set
Continuous-duty gas engine system | 0.8–2.0 MWe | Natural gas
Pipeline-quality renewable methane where approved | Food processing, manufacturing plants, cold-storage facilities, process industries, wastewater treatment campuses, and industrial microgrids. | Approximately 40–46% | Dedicated engine room or containerized module, reinforced foundation, high-capacity ventilation, combustion-air and radiator-air design, exhaust backpressure control, fire protection, medium-voltage switchgear, synchronization controls, and lifting access. | Require a verified gas composition, adequate supply capacity during peak operation, low moisture and contaminant levels, and protection against siloxanes, hydrogen sulfide, heavy hydrocarbons, or particulates when non-pipeline gas is considered. | Continuous operation normally requires an air-emissions permit, stack testing or monitoring, occupational safety controls, and grid-interconnection approval. Applicable requirements may include EU industrial-emissions rules, U.S. federal and state air permits, or equivalent national frameworks. | Strong balance between electrical efficiency, process-heat recovery, and dependable base-load operation. |
| 4 | Landfill-Gas Generator Set
Low-pressure renewable-gas engine package | 0.5–2.0 MWe per unit | Landfill gas
Typically methane-rich gas with variable composition | Landfill gas recovery projects, renewable-power plants, waste-management facilities, and local microgrids. | Approximately 34–42% | Install gas collection headers, condensate traps, blowers, gas cooling, filtration, moisture removal, flare or bypass arrangements, fire and explosion protection, and adequate separation from waste-gas hazards. Plan for periodic engine cleaning. | Gas treatment is essential. Hydrogen sulfide, siloxanes, moisture, volatile organic compounds, and particulates can damage valves, pistons, catalysts, and lubricating oil. Gas quality should be continuously checked. | Projects may require landfill-gas collection and control compliance, renewable-energy certification, air permits, odor controls, hazardous-area assessment, and methane management. Requirements differ significantly between the EU, United States, Canada, Australia, and national waste-regulation systems. | Converts a difficult waste stream into dispatchable electricity while reducing uncontrolled methane emissions from the landfill. |
| 5 | Anaerobic-Digester Biogas Set
Agricultural or wastewater renewable-energy package | 0.3–1.5 MWe per unit | Digester biogas
Methane content commonly varies with feedstock and process control | Farms, food-waste digesters, municipal wastewater plants, dairies, breweries, and organic-waste treatment facilities. | Approximately 32–42% | Provide a gas holder or buffer volume, desulfurization, gas drying, particulate removal, flame arrestors, emergency flare, ventilation, classified electrical equipment where required, and heat recovery for digester temperature control. | Maintain stable methane concentration and pressure. Hydrogen sulfide, water vapor, ammonia, siloxanes, and foam carryover should be controlled before the gas reaches the engine. | Check renewable-gas, waste-management, wastewater, odor, fire-safety, and air-quality permits. Grid export may require synchronization protection, anti-islanding functions, power-quality testing, and utility approval. | Particularly suitable where recovered engine heat can maintain digester temperature, improving overall site energy efficiency. |
| 6 | Remote Microgrid Gas Generator Set
Prime-power or hybrid-capable modular system | 1–5 MWe per unit | Natural gas
Renewable methane or treated associated gas where available | Remote industrial sites, island grids, mining operations, large construction camps, isolated communities, and hybrid solar-plus-storage systems. | Approximately 38–45% | Use skid or containerized installation with fuel-gas conditioning, black-start capability, load-sharing controls, synchronization equipment, battery or spinning-reserve support, grounding system, spare-parts storage, and protection against dust, heat, humidity, and corrosive environments. | Gas supply reliability is critical. Include pressure monitoring, automatic fuel isolation, filtration, gas heating when required, and dual-fuel or backup-fuel planning if pipeline interruptions are likely. | Verify local rules for isolated grids, generator emissions, electrical protection, hazardous locations, transportable equipment, and worker safety. Equipment may need certification for tropical, desert, high-altitude, or cold-climate operation. | Efficient prime power with flexible integration alongside renewables and battery storage, reducing fuel consumption during variable loads. |
| 7 | Large Utility-Scale Gas Engine Set
Multi-unit power-station configuration | 5–20 MWe per unit | Pipeline natural gas
Renewable methane may be blended subject to fuel specifications | Peaking plants, balancing power, utility-scale distributed generation, industrial power parks, and high-renewable grids requiring flexible dispatch. | Approximately 44–50% | Requires a complete power-plant design: multiple engine foundations, high-voltage switchyard, gas metering station, pressure-reduction and heating system, exhaust stacks, selective catalytic reduction or oxidation catalyst where required, fire protection, water systems, control room, and maintenance lifting equipment. | Secure pipeline capacity, gas-quality monitoring, pressure stability, metering accuracy, and emergency shut-down systems. Fuel flexibility must be confirmed through engine testing and formal approval. | Large projects typically require environmental impact review, air-quality permitting, grid-code compliance, protection coordination, noise assessment, and construction approval. Requirements may involve EU industrial-emissions legislation, U.S. EPA and state rules, or equivalent national utility regulations. | Fast start-up, strong part-load flexibility, high availability through modular redundancy, and effective support for grids with intermittent renewable generation. |
