China Factory Liquid Nitrogen Plants - Modular PSA Nitrogen Generation & High-Efficiency Liquefaction Solutions from Suppliers
Purity (Feed Gas)
≥99.5% N²
Power Consumption
≤0.35 kWh/L
Liquefaction Efficiency
≥80%
Cold Start-up Time
≤4 Hours
| Parameter | Value | Remark |
|---|---|---|
| Liquefaction Feed Gas | High-purity N₂ (≥99.5%) | Directly from PSA unit |
| Refrigeration Method | Joule-Thomson expansion cycle | No external refrigerant |
| LN₂ Tank Volume | 5–100 m³ (customizable) | Vacuum multi-layer insulation |
| LN₂ Tank Working Pressure | ≤0.8 MPa | - |
| Daily Evaporation Rate | ≤0.3% | Per GB/T 18443 |
| LN₂ Outlet Temperature | ≤-193 ℃ | - |
| Cold Start-up Time | ≤4 h (first cold-down) | - |
| Liquefaction Efficiency | ≥80% (liquefied / feed) | - |
| Overall Power Consumption | ≤0.35 kWh/L (liquid N₂) | Includes N₂ gen. + liquefaction |
The system requires high-purity nitrogen gas (≥99.5%), which can be fed directly from an on-site PSA (Pressure Swing Adsorption) nitrogen generator unit.
It adopts a Joule-Thomson expansion cycle, eliminating the requirement for any external refrigerants and simplifying plant maintenance.
The overall power consumption is ≤0.35 kWh per liter of liquid nitrogen, encompassing both the nitrogen generation and the liquefaction processes.
The storage tanks utilize vacuum multi-layer insulation technology, maintaining a low daily evaporation rate of ≤0.3% in compliance with GB/T 18443 standards.
The first cold-down start-up process is completed within ≤4 hours, after which the unit delivers liquid nitrogen at temperatures of ≤-193 ℃.




