Systems and methods for re-condensation of boil-off gas

A method for re-condensing a boil-off gas stream of a first cryogenic fluid from a first tank comprising:

• receiving the boil-off gas stream at an inlet of a first passage of a heat exchanger;
• determining, using information corresponding to a characteristic of the boil-off gas stream, a flow of a stream of a second cryogenic fluid from a second tank through a second passage of the heat exchanger to condense at least a portion of the boil-off gas stream as the boil-off gas stream passes through the first passage;
• receiving the stream of the second cryogenic fluid at an inlet of the second passage of the heat exchanger;
• condensing at least a portion of the boil-off gas stream to provide a liquid stream of the first cryogenic fluid from an outlet of the first passage of the heat exchanger;
• and
• returning the liquid stream of the first cryogenic fluid to the first tank.

A tangible and non-transitory computer readable medium comprising one or more computer software modules configured to direct at least one processor to:

• determine, using information corresponding to a characteristic of a boil-off gas stream of a first cryogenic fluid from a first tank configured to enter a first passage of a heat exchanger, a flow of a stream of a second cryogenic fluid from a second tank through a second passage of the heat exchanger to condense at least a portion of the boil-off gas stream as the boil-off gas stream passes through the first passage;
• direct the stream of the second cryogenic fluid into an inlet of the second passage of the heat exchanger;
• whereby at least a portion of the boil-off gas stream is condensed to provide a liquid stream of the first cryogenic fluid from an outlet of the first passage of the heat exchanger as the boil-off gas stream passes through the first passage;
• and
• direct the liquid stream of the first cryogenic fluid to the first tank.