Cold energy recovery facility and marine vessel

A cold energy recovery facility, comprising:

• a liquid hydrogen tank configured to store liquid hydrogen;
• a first circuit configured to circulate a first working medium;
• a second circuit configured to circulate a second working medium having a freezing point higher than the first working medium;
• a first turboexpander provided in the first circuit, the first turboexpander being configured to be driven by the first working medium in a gas state,
• a second turboexpander provided e second circuit, the second turboexpander being configured to be driven by the second working medium in gas state;
• a first heat exchanger configurer to vaporize the liquid hydrogen from the liquid hydrogen tank by heat exchange with the first working medium;
• a second heat exchanger configured to vaporize the first working medium in a liquid state by heat exchange with the second working medium;
• and
• a third heat exchanger configured to vaporize the second working medium in a liquid state by heat exchange with a be medium, wherein
• the first circuit and the first turboexpander form a part of a first thermodynamic cycle that uses the liquid hydrogen as a low-temperature heat source in the first heat exchanger, and
• the second circuit and the second turboexpander form a part of a second thermodynamic cycle that uses the first working medium as a low temperature heat source in the second heat exchanger,
• wherein the cold energy recovery facility comprises:
• a first generator configured to be driven by the first turboexpander;
• a second generator configured to be driven by the second turboexpander,
• a third circuit forming a part of an air conditioning cycle, the third circuit being configured to circulate a third working medium;
• and
• a condenser forming a part of the air conditioning cycle, the condenser being configured to condense the third working medium flowing through the third circuit, and wherein
• the condenser is configured to condense the third working medium by heat exchange with the first working medium in a gas state upstream of the first turboexpander in the first circuit or the second working medium in a gas state upstream of the second turboexpander in the second circuit.

A cold energy recovery facility, comprising:

• a liquid hydrogen tank configured to store liquid hydrogen;
• a first circuit configured to circulate a first working medium,
• a second circuit configured to circulate a second working medium having a freezing point higher than the first working medium;
• a first turboexpander provided in the first circuit, the first turboexpander being configured to be driven by the first working medium in a gas state;
• a second turboexpander provided in the second circuit, the second turboexpander being configured to be drive by the second working medium in a gas state;
• a first heat exchanger configured to vaporize the liquid hydrogen from the liquid hydrogen tank by heat exchange with the first working medium;
• a second heat exchanger configured to vaporize the first working medium in a liquid state by heat exchange with the second working medium;
• and
• a third heat exchanger configured to vaporize the second working medium in a liquid state by heat exchange with a heat medium, wherein
• the first circuit and the first turboexpander form a part of a first thermodynamic cycle that uses the liquid hydrogen as a low-temperature heat source in the first heat exchanger,
• the second circuit and the second turboexpander form a part of a second thermodynamic cycle that uses the first working medium as a low-temperature heat source in the second heat exchanger,
• the first circuit is configured to circulate an inert substance as the first working medium, and
• the cold energy recovery facility further includes
• a supply line diverging from the first circuit on an upstream side of the first turboexpander, the supply line being configured to supply the first working medium to a device, and
• a return line merging into the first circuit on a downstream side of the first turboexpander, the return line being configured to return the first working medium from the device to the first circuit.