ethylene boil off gas use propylene as refrigerant

good day everyone,

did anyone here work with BOG system ? especially for ethylene BOG.
I just start working with BOG system and want to know what is fundamental design for boil off gas system. I use liquid propylene for refrigerant unit to liquefaction ethylene.

liquid propylene are compressed by screw pump, beside ethylene compressed use two stage reciprocating compressors.

thank you for valuable sharing,

Regards,
Tresna
 
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