Abstract: A cooling system comprising: a closed main refrigerant circuit which, in the direction of the circuit, includes a compressor, a condenser, an expansion valve, and an evaporator; and a safety arrangement which completely surrounds the main refrigerant circuit and an auxiliary refrigerant and/or neutralizing agent interspersed, such that in the event of a leak in the main refrigerant circuit, any main refrigerant circulating in the main refrigerant circuit must pass through the auxiliary refrigerant and/or neutralizing agent before it reaches an environment outside the safety arrangement. Also, an aircraft with such a cooling system.

Abstract: A water tank, including: a dry ice compartment arranged inside the tank to be brought in contact with water to be cooled inside the tank. The compartment is provided with a hole for discharging evaporated gas from the compartment into a space that is closer to a top wall of the tank than a bottom wall of the tank. A side wall of the tank connects the top and the bottom walls of the tank, and extends above the water volume within the tank. A water outlet extends from the bottom wall of the tank. An aircraft cabin trolley, an aircraft galley and an aircraft with such a water tank are also provided.