Power supply and cooling system for a floating structure

A gas supply and cooling system for a floating structure comprising at least one tank configured to contain the gas, the supply and cooling system comprising:

• at least one supply circuit configured to be traversed by gas coming from the at least one tank, and comprising at least one compression device, the at least one supply circuit being configured to connect the at least one compression device to a headspace of the at least one tank, and to supply gas to at least one gas-consuming device which equips the floating structure,
• at least one cooling circuit configured to be traversed by a refrigerant, comprising at least one heat exchanger configured to participate in an internal pressure management of the at least one tank, an internal heat exchanger and a turbocompressor comprising a compression member arranged upstream of a first pass of the internal heat exchanger and a turbine arranged downstream of the first pass of the internal heat exchanger, the compression member and the turbine being connected in rotation by a shaft, and the cooling circuit being connected to the at least one supply circuit on either side of the at least one compression device,
• wherein the at least one compression device comprises at least two compression stages, the supply and cooling system comprising a control device configured to connect the compression stages in series when the at least one compression device supplies the gas-consuming device and to connect the compression stages in parallel when the at least one compression device supplies the cooling circuit.