Method for cooling a heat exchanger of a gas supply system for a gas-consuming apparatus of a ship

A method for supplying gas to a gas-consuming apparatus provided on a ship comprising a tank containing the gas in a liquid state and in a gaseous state, the method comprising:

• supplying the gas-consuming apparatus with gas withdrawn in the gaseous state from the tank by a supply unit,
• condensing at least a part of the gas withdrawn in the gaseous state from the tank by a condensation unit comprising at least one heat exchanger which comprises at least one first pass and one second pass, said heat exchanger being configured to perform a heat exchange between gas withdrawn between the supply unit and the gas-consuming apparatus and flowing in the first pass and gas flowing between the tank and the supply unit and flowing in the second pass, and
• cooling the heat exchanger by a flow of gas in the first pass and in the second pass of the heat exchanger, the cooling being implemented prior to the condensing and at least partially simultaneously with the supplying.