A full fleet of Yuchai 12VCN and 16VCN gas‑fired container generator sets, with a total installed capacity of 24.5 MW, has been deployed for a coal‑mine‑gas (CMM) power‑generation station project in Bijie, Guizhou Province, delivering clean on‑site power by converting drained coal‑mine gas into usable electricity.
1. Project Background: Bijie, Guizhou Coal‑Mine‑Gas Resource
Located in Southwest China's major coal‑producing zone, Bijie is rich in coal‑mine gas resources, which are extracted from underground coal seams during mining operations. Without effective utilisation, drained methane‑rich gas would be vented into the atmosphere, wasting valuable energy resources and generating substantial greenhouse‑gas emissions. This 24.5 MW container‑type gas‑powered station follows the strategy of "promoting gas drainage through gas utilisation, and ensuring mining safety through effective drainage". It turns hazardous coal‑mine gas into low‑carbon electric power, supplying stable electricity for mine operational loads while feeding surplus power into the local public grid. The project advances local coal‑industry safety management, energy conservation, emission reduction and green‑transformation goals.
2. Rationale for Yuchai 12VCN & 16VCN Gas‑Engine Solution
The project adopts Yuchai 12‑cylinder V‑type (12VCN) and 16‑cylinder V‑type (16VCN) gas engines, purpose‑built for variable‑concentration coal‑mine‑gas working conditions. Multi‑unit parallel‑running configuration delivers the total 24.5 MW installed output. Container‑skid‑mounted design drastically shortens on‑site construction cycles, reduces civil‑engineering investment, and delivers robust protection against Guizhou's high‑humidity, hilly‑terrain operating environment. These gas‑powered units are engineered to accommodate fluctuations in gas methane concentration and supply pressure, ensuring long‑term, reliable, continuous operation for round‑the‑clock power generation.
3. Key Technical Specifications
Prime Mover: Yuchai 12VCN, 16VCN, V‑configuration gas‑fired engines
Total Installed Capacity: 24.5 MW
Layout: Fully container‑ised, multi‑generator parallel‑operation system
Fuel Source: Extracted coal‑mine gas (methane‑rich mine gas)
Rated Frequency: 50 Hz
Rated Speed: 1500 r/min
Voltage Output: Medium‑voltage output, matched to mine & local grid distribution systems
Control System: Intelligent gas‑adaptation closed‑loop control, AVR automatic voltage regulation, multi‑set parallel‑synchronisation management
Environmental Upgrade: Container housing with moisture‑proof, corrosion‑resistant treatment, adapted to high‑humidity mountain climate of Guizhou
4. Operational Value After Commissioning
Since commissioning, the 24.5 MW container‑type gas power station has made full use of continuously‑drained coal‑mine gas. On‑site generated power supplies priority electricity to mine ventilation, water‑pumping and critical production equipment. Excess power is exported to the regional power grid, creating stable long‑term revenue streams. The Yuchai 12VCN / 16VCN gas power units have maintained high‑efficiency, stable continuous operation, cutting greenhouse‑gas emissions and delivering a win‑win outcome covering mine‑safety improvement, comprehensive resource utilisation and low‑carbon economic benefits.
5. Frequently Asked Questions (FAQ)
Q: Why select 12VCN and 16VCN gas‑fired engines for coal‑mine‑gas power‑generation?
A: The Yuchai VCN‑series gas engines are optimised for coal‑mine gas, with strong adaptability to fluctuations in methane concentration and gas supply pressure -‑ a core challenge for mine‑gas power‑generation projects.
Q: What are the advantages of the container‑type configuration for this project?
A: Container‑integrated design greatly cuts site installation time, lowers construction costs, and provides all‑weather protection against high humidity, mist and mountain‑climate corrosion in the Bijie area.
Q: How does this 24.5 MW station use its generated electricity?
A: Generated power is prioritised to supply critical mine‑site loads; surplus power is fed into the local public grid to deliver economic and environmental returns.