METHOD AND SYSTEM FOR STORAGE AND TRANSPORT OF LIQUEFIED PETROLEUM GASES

摘要

The present invention relates to a method and system for storage and transport of liquified petroleum gases (LPG) on LPG carriers where boil off gas from the LPG is compressed in a cargo compressor with minimum two stages of compression, condensed in a cargo condenser and any non-condensable gases can be separated and/or gas and liquid can be mixed in a liquid receiver. A warm and mixed two-phase condensate stream leaving the liquid receiver is heat exchanged by glide refrigeration in at least one condensate sub-cooler, and any droplets present in a stream leaving the at least one condensate sub-cooler is removed in at least one droplet separator before being returned to the cargo compressor thus forming a further cooled, compressed stream.