CNG Generators

* Safety & Reliability: Multi-layer safety interlock: high-energy ignition, electronic governor, knock monitoring, overspeed protection, low-pressure gas cutoff, high-temperature alarm, and abnormal lube-oil consumption detection—full coverage for stable operation.
* Clean & Eco-Friendly: Full combustion, zero black smoke or dust; compliant with national standards and EU Stage IIIA; NOx as low as 250-500mg/Nm3; ideal for urban and environmentally sensitive deployments.
* High Efficiency & Energy Saving: 35%-42% power generation efficiency; CHP model reaches >85% total energy utilization vs. ~60% for pure generation; waste heat recoverable for heating, cooling, or steam—maximum energy utilization.
* Flexible Adaptation: 30kW-3600kW per unit, scalable to tens of MW; compatible with natural gas, biogas (CH4>=35%), associated gas, coalbed methane, refinery tail gas, and biomass gas; custom preprocessing available.

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Product & Technical Features

Intelligent Control
- GESAM / Zhongzhi HMC auto-synchronizing controllers: remote monitoring, automatic load tracking, grid synchronization, fault diagnosis, Modbus/Profibus protocols; BMS integration supported.
Compact Structure & Easy Maintenance
- Whole factory-assembled with common base frame:B-type (open) / L-type (silent) / C-type (container); ≥2000h maintenance interval; easy spare parts; remote diagnostics minimize downtime and cost.
Fuel Economy
- Gas 30%-50% cheaper than diesel; waste heat recovery further reduces costs; short ROI for industrial parks, data centers, hospitals, and high energy-demand facilities.
Full-Process Technical Support
- One-stop support: gas analysis, unit selection, system design, installation, commissioning, and operation training—complete turnkey engineering service.

Core Advantages

Clean & Eco-Friendly

Zero black smoke or dust; NOx as low as 250-500mg/Nm3, meeting strictest regional emission standards
Intelligent Control

Microcomputer grid-synchronizing controller with remote monitoring, fault diagnosis & auto load tracking
High Efficiency

CHP achieves >85% total efficiency; waste heat for heating & cooling maximizes energy utilization
Modular Design

Whole factory-assembled with common base frame with B/L/C structural options; multi-unit parallel scaling for flexible capacity
Stable & Reliable

Brand original engines with multi-layer safety interlocks ensure year-round continuous operation

Cost Effective

Gas 30%-50% cheaper than diesel; waste heat recovery further reduces operational costs
Full-Service Support

One-stop technical support: gas analysis, selection, design, installation, and O&M training
Flexible Fuel Options

Compatible with natural gas, biogas, associated gas, CBM, refinery tail gas, and biomass gas

Product Specifications

Jichai
Weichai
Yuchai

Power range	200kW level	500kW level	1000kW level	2000kW level
Unit model Engine model	JGM200GF	JGM500GF	JGM1000GF	JGM2000GF
Rated voltage	12V190ZLD	16V190ZLD	12M26R	12M26R×2
Rated frequency	400V	400V/10kV	400V/10kV	10kV
Power generation efficiency	50Hz	50Hz	50Hz	50Hz
Combined efficiency (thermal power generation)	37%~39%	38%~40%	40%	40%~42%
Applicable fuels	>=85%	>=85%	>=85%	>=85%
Dimensions (approx., mm)	Natural gas / Biogas	Natural gas / Biogas	Natural gas / Coalbed methane	Natural gas
Reference weight (kg)	2600×900×1500	3200×1200×1700	3800×1500×2000	4200×1800×2200
Power range	~4200	~7500	~12000	~22000

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Model	Rated Power (kW/HP)	Frequency	Engine	Fuel	Structure
WPG75	75/68	50Hz	WP2.1N	Natural gas	B type
WPG100	100/91	50Hz	WP2.7N	Natural gas	B/L type
WPG150	150/136	50Hz	WP4.5N	Natural gas	B/L type
WPG200	200/182	50Hz	WP6.7N	Natural gas	B/L type
WPG300	300/273	50Hz	WP10N	Natural gas	B/L type
WPG400	400/364	50Hz	WP13N	Natural gas	B/L type
WPG500	500/455	50Hz	WP13N×2	Natural gas	B/L type
WPG600	600/545	50Hz	6M33	Natural gas	B/L type
WPG800	800/727	50Hz	12M26	Natural gas	B/L type
WPG1000	1000/909	50Hz	12M33	Natural gas	B/L type
WPG1375	1375/1250	50Hz	16M33	Natural gas	B/L type
WPG1500	1500/1364	50Hz	12M55	Natural gas	B/L type
WPG3600	3600/3273	50Hz	16M55	Natural gas	B/L/C type

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Model	Rated Power (kW/HP)	Frequency	Series Suffix	Fuel	Voltage
YCN30GF	30/27	50Hz	N5LC30	Natural gas	380V
YCN50GF	50/45	50Hz	N5LC50	Natural gas	380V
YCN80GF	80/73	50Hz	N5LC80	Natural gas	380V
YCN100GF	100/91	50Hz	N5LC100	Natural gas	380V
YCN150GF	150/136	50Hz	N5LC150	Natural gas	400V
YCN200GF	200/182	50Hz	N5LC200	Natural gas	400V
YCN300GF	300/273	50Hz	N5LC300	Natural gas	400V
YCB80GF	80/73	50Hz	B5LC80	Biogas	380V
YCB100GF	100/91	50Hz	B5LC100	Biogas	400V
YCB150GF	150/136	50Hz	B5LC150	Biogas	400V
YCB200GF	200/182	50Hz	B5LC200	Biogas	400V
YCM200GF	200/182	50Hz	M5LC200	Natural gas	400V
YCM300GF	300/273	50Hz	M5LC300	Natural gas	400V
YCM400GF	400/364	50Hz	M5LC400	Natural gas	400V
YCM500GF	500/455	50Hz	M5LC500	Natural gas	400V

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Basic Operating Principle

Gas generator sets use combustible gases (natural gas, biogas, etc.) as primary fuel. The gas engine converts chemical energy into mechanical energy, driving a synchronous generator to produce electricity, and the control system achieves grid synchronization. The process covers five core stages: gas supply, air-fuel ratio control, ignition & combustion, power generation, and waste heat recovery.

System Components & Functions

Gas Supply System: Gas is processed through a pressure regulating valve set (pressure reduction, filtration, stabilization) to the required inlet pressure (3-20kPa), then precisely mixed with air via a gas mixer for stable combustion.
Air Intake System: Air filtered through an air cleaner enters the turbocharger (exhaust gas turbocharging), then passes through an intercooler before entering the engine cylinder to mix with gas for combustion.
Ignition & Combustion System: Natural gas models use spark plug ignition (high-energy ignition coil + electronic spark advance control); biogas models add online gas quality monitoring to prevent knocking.
Power Output System: Gas combustion pushes pistons to generate reciprocating motion, converted to crankshaft rotation via connecting rods, driving the synchronous generator rotor (4-pole, 1500r/min).
Lubrication System: Gear pump forced lubrication with dual filtration (oil filter + centrifugal filter); integral or split oil cooler maintains optimal oil temperature and viscosity.
Cooling System: Closed cooling circulation: water pump drives coolant through engine water jacket, oil cooler, intercooler, then radiator; high-power units equipped with forced-draft fans or independent cooling towers.
Exhaust & Silencing System: Exhaust gas passes through turbocharger, exhaust manifold, industrial silencer (<=85dB), and expansion joint to outdoor; waste heat recovered via heat recovery boiler or flue gas heat exchanger (CHP mode).
Grid Synchronization Control System: Microcomputer controller monitors voltage, frequency, and phase in real time, automatically adjusting generator synchronization; after grid connection, it tracks load changes and allocates load ratios precisely, supporting remote communication and data logging.

CCHP Operating Principle

CCHP (Combined Cooling, Heating and Power) recovers engine waste heat (high-temperature coolant + flue gas) via a heat recovery boiler or heat exchanger for winter heating or summer absorption cooling. Typical systems achieve >85% total energy utilization: 35%-42% power generation efficiency plus ~30%-40% waste heat recovery.

Special Preprocessing for Biogas & CBM

Dehydration: chiller dryer or water separator removes moisture, preventing corrosion and ice blockage.
Desulfurization: dry or wet desulfurization unit (biogas requires H2S <200mg/Nm3).
Filtration: gas filter removes dust, impurities, and oil contaminants.
Pressure stabilization: high-pressure CBM requires pressure regulating valve set to engine inlet range.
Online calorific value monitoring: real-time feedback adjusts air-fuel ratio automatically.

Application Scenarios

Natural Gas Distributed Energy

Suitable for industrial parks, science & technology parks, data centers, and large commercial complexes. Natural gas fuel with CHP achieves >85% total energy efficiency. Jichai and Weichai high-power units (500kW-3600kW) meet MW-level park demands with flexible multi-unit scaling.
Biogas Power Generation

Applicable to municipal landfill sites, wastewater treatment plants, and organic waste anaerobic fermentation projects. Landfill/biogas with 35%-70% CH4 is preprocessed and fed to gas generator sets for power generation, delivering both environmental (GHG reduction) and economic benefits.
Oilfield Associated Gas Power Generation

Applicable to oil and gas field associated gas recovery. Associated gas traditionally vented and flared can now be consumed on-site by gas generator sets (200kW-2000kW), converting waste into revenue while reducing environmental pollution.
Coalbed Methane (CBM) Power Generation

Applicable to coal mine CBM (methane) recovery projects. With stable calorific value, on-site power generation reduces GHG emissions (CH4 global warming potential is 21x that of CO2). Jichai series is designed for high-concentration CBM (CH4>30%).
Refinery Tail Gas & Biomass Gas Power

Applicable to refinery, chemical, and food fermentation enterprises' process tail gas recovery. Refinery tail gas (coking gas, dry gas) and biomass gas (straw gas, wood gas) vary in calorific value and composition, requiring custom preprocessing solutions.
Hospital & Data Center Applications

Ideal for hospitals, data centers, and critical facilities requiring high power reliability. Units serve as primary or backup power; automatic start and grid connection within <=10s of mains failure; waste heat used for air conditioning or hot water during normal operation.