Liquefaction & Boil-Off Gas Management System

RIX’s cryogenic liquefiers are efficient, robust and maintenance free, making them ideal for onsite, point-of-use liquefaction of most gases anywhere electrical power is available. RIX offers custom packages designed to fit your specific application. The cryogenic coldheads are installed directly into the ullage space of an existing bulk storage tank or into a separate vacuum insulated condensing chamber. As gas comes in contact with the cold heat exchanger the condensing liquid falls to the pool below. In those applications requiring a separate condensing chamber, the liquid is transferred back to the storage tank via a pump or pressure build system. The cooling power can be manually adjusted or set to automatically maintain a certain system storage pressure.

The heart of RIX's long-life, no-maintenance technology is the resonant linear reciprocating motors. These have a unique wear-free bearing system, with unlimited life and pure single-axis motion. This eliminates contact between moving parts and associated lubrication requirements. RIX motors utilize an innovative interdigitating moving magnet design with robust coil-over-iron stators. They are recognized throughout the world as the premier linear reciprocating motor. Combine these with RIX’s unique thermoacoustic Stirling coldheads, with no moving parts, and you have a cryocooler that requires no maintenance and has very low vibration. Our variable frequency electronic controllers are matched to the resonant frequency of each cryocooler. This optimizes performance while minimizes power consumption. Sensors are provided to monitor vibration, motor temperature and main heat rejector temperature, shutting the system down if a problem is detected. The supply power is automatically modulated via a PID control loop, based on coldhead temperature, which maintains system temperature and pressure. This autonomy, along with a single push-button start, makes RIX liquefiers simple to use and allows unattended operation.

SYSTEM SPECIFICATIONS:

The liquefactions rates of our cryocoolers are dependent on the gas being liquefied, the temperature of the gas being liquefied, and the system pressure. The production rates (without heat exchanger losses) are estimated as follows:

Gas	300K Inlet Gas Temperature	Gas at Saturation Temperature
Methane	37 lt/hour	67 lt/hour
Oxygen	20 lt/hour	40 lt/hour
Argon	18 lt/hour	28 lt/hour
Nitrogen	22 lt/hour	50 lt/hour

 

Individual cryocooler specifications are as follows:

Cryocooler Model	2s102K	2s132K	2s226K	2s241K	2s362K
Approximate Capacities @ 77K (W)	7	28	140	190	800
Approximate Capacities @ 150K (W)	27	80	390	600	2,900
No load temperature (K)	50	45	37	50	40
Power consumption @ rated condition (W)	275	600	2,750	4,500	22,000
Electrical requirements	110Vac max., 1Φ, 60Hz	110Vac max., 1Φ, 60Hz	208Vac max., 1Φ, 60Hz	208Vac max., 1Φ, 60Hz	380Vac max., 1Φ, 60Hz
Maximum operating current (amps)	4.25	9	30	40	80
Ambient operating temperature	320-900F     (00-320C)	320-900F         (00-320C)	320-900F           (00-320C)	320-900F           (00-320C)	320-900F           (00-320C)
Maintenance Interval	None	None	None	None	None
Rejection method	H2O or Air	H2O or Air	H2O	H2O	H2O
Cooling flow rate (H2O)	1 liters/min	2 liters/min	10 liters/min	12 liters/min	50 liters/min