System for supplying gas to at least one gas-consuming appliance equipping a ship

A gas supply system for supplying gas to at least one gas-consuming appliance equipping a ship, the supply system comprising:

• one gas supply line for supplying gas to the at least one gas-consuming appliance, said gas supply line being configured to be passed through by gas taken in the liquid state from a tank and subjected to a pressure lower than a pressure of the gas in a headspace of the tank;
• one first compression member configured to compress the gas from the gas supply line for supplying gas to the at least one gas-consuming appliance;
• and
• one second compression member,
• wherein the first compression member and the second compression member alternately compress the gas in the gaseous state from the gas supply line and the gas taken in the gaseous state from the headspace of the tank,
• wherein at least one pipeline is arranged between the headspace of the tank and an intermediate inlet of the first compression member, at least one control member being arranged on the at least one pipeline, and
• wherein the intermediate inlet of the first compression member is arranged so that the gas taken in the gaseous state from the headspace of the tank mixes with an evaporated gas at a point of the first compression member at which this evaporated gas is already compressed to the pressure of the gas present in the headspace of the tank.