Exhaust handling systems for marine vessels and related methods

An exhaust handling system for a marine vessel, the exhaust handling system comprising:

• a cap connected to a top end portion of an exhaust stack of the marine vessel such that the cap is supported by the exhaust stack and such that the cap defines an enclosure positioned to at least partially surround an outlet of an exhaust pipe extending through the exhaust stack of the marine vessel;
• a pressure-actuated vent in fluid communication with the enclosure;
• and
• a collection pipe in fluid communication with the enclosure to receive exhaust therefrom and connected to an exhaust cleaning assembly, the exhaust cleaning assembly including at least one tank to receive the exhaust.

A method comprising:

• (a) positioning a marine vessel in a berthing location, the marine vessel including a deck, an exhaust stack having a top end portion positioned above the deck, an exhaust pipe extending through the exhaust stack to an outlet and positioned above the top end portion of the exhaust stack, a cap connected to the exhaust stack so as to define an enclosure positioned to at least partially surround the outlet of the exhaust pipe, and a collection pipe in fluid communication with the enclosure to receive exhaust therefrom;
• (b) connecting one or more tanks to the collection pipe after step (a), thereby to receive the exhaust;
• and
• (c) operating the marine vessel to flow an exhaust emitted from the outlet of the exhaust pipe to the one or more tanks after step (b) and via the collection pipe.

A method comprising:

• (a) positioning a marine vessel in a berthing location, the marine vessel including an exhaust stack, an exhaust pipe extending through the exhaust stack to an outlet positioned at an elevation above a top end portion of the exhaust stack, and a cap connected to the exhaust stack to define an enclosure positioned to surround the outlet of the exhaust pipe;
• (b) flowing an exhaust from the enclosure to atmosphere surrounding the cap via a first flow path during step (a), the first flow path at least partially defined by the cap;
• (c) connecting one or more tanks to receive the exhaust;
• and
• (d) flowing the exhaust from the enclosure to the one or more tanks via a second flow path after step (b), the second flow path at least partially defined by the cap.