Turnkey LNG to CNG Conversion Plants (LCNG)
Cryogenic liquid pumping to 250 bar CNG with up to 80% lower electrical power demand compared to conventional gas compression.
The 5-Stage LCNG Conversion Cycle
How liquid LNG transforms into high-pressure CNG with maximum thermodynamic efficiency and zero gas venting.
Cryogenic LNG Offloading & Storage
LNG is delivered via specialized cryogenic ISO trailers or bobtails at -162°C and transferred into double-walled vacuum-jacketed stainless steel tanks equipped with pressure-building circuits.
High-Pressure Cryogenic Liquid Pumping
Submerged or external cryogenic reciprocating piston pumps elevate liquid LNG up to 250 bar. Pumping in the liquid state saves 75% to 80% electrical energy compared to gas compressors.
High-Pressure Thermal Regasification
High-pressure liquid LNG passes through multi-tier ambient air fin vaporizers, utilizing free atmospheric heat to regasify the cryogenic liquid into natural gas above 0°C.
Boil-Off Gas (BOG) Re-Condensation / Recovery
Evaporative boil-off gas in storage tanks is routed into an automated BOG compressor or re-condenser unit, guaranteeing 100% gas capture with zero flaring or venting.
Priority Cascade Buffer & Fast Dispensing
Gas is stored in high-pressure cascade banks (3-bank sequencing) and metered through Coriolis mass flow dispensers to fuel vehicle fleets or cascade trailers at 200-250 bar.
LCNG Cryo Pumping vs. Standard CNG Compression
Why liquid pumping delivers superior OPEX and faster payback for industrial heavy users.
JASA LCNG Cryogenic System
Recommended- 75% - 80% Lower Power Demand: Pressurizing incompressible liquid requires a fraction of the kW of gas compression.
- Free Ambient Heat: Regasification uses atmospheric ambient vaporizers, eliminating burner fuel costs.
- Decentralized Independence: Operates 100% off-grid without requiring a pipeline interconnection.
- Compact Physical Footprint: 600x energy storage density compared to atmospheric gas.
Standard Pipeline CNG Station
Traditional- ❌ Massive Electrical Grid Dependency: Multi-stage compressors draw 250kW to 500kW+ constantly.
- ❌ High Mechanical Wear: Heavy vibration, continuous piston ring, and valve maintenance.
- ❌ Tied to Pipeline Right-of-Way: Cannot be deployed outside existing gas distribution networks.
- ❌ Pressure Fluctuation Vulnerability: Dependent on incoming pipeline supply pressure.
Frequently Asked Questions on LCNG
Liquid natural gas (LNG) is incompressible. Pumping cryogenic liquid from 2 bar to 250 bar requires only hydraulic power (approx. 0.04 kWh per Nm³), compared to mechanical gas compression that must overcome tremendous gas expansion ratios (approx. 0.22 kWh per Nm³). Vaporization then occurs naturally using ambient air heat exchangers with zero power input.
All JASA LCNG plants are engineered in strict compliance with NFPA 52 (Vehicular Natural Gas Fuel Systems Code), NFPA 59A (Standard for the Production, Storage, and Handling of LNG), ASME B31.3 (Process Piping), and European EN 13645 standards. Systems include dual emergency shut-down (ESD) valves, cryogenic spill impoundment basins, gas/flame detection arrays, and safety relief valves.
Because JASA utilizes pre-engineered modular cryogenic skids, typical delivery timelines range from 4 to 8 months from engineering sign-off to commissioning, depending on civil works, storage tank capacity, and local regulatory permits.