An energy transfer system that includes a tank comprising an outer wall having a circumference. A first fluid pathway surrounds a portion of the circumference of the tank. A second fluid pathway seals the portion of the circumference of the tank and the first fluid pathway from the environment.

An energy transfer system that includes a tank comprising an outer wall having a circumference. A first fluid pathway surrounds a portion of the circumference of the tank. A second fluid pathway seals the portion of the circumference of the tank and the first fluid pathway from the environment.

A heat pump system includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger connected in sequence to form a refrigerant main circuit. The outdoor heat exchanger includes at least one double-rowed heat exchanger. The heat pump system has a cooling mode and a heating mode, and further includes a switching unit. The switching unit is connected in the refrigerant main circuit, and switches a flow direction of a refrigerant, such that the refrigerant flows into the outdoor heat exchanger through one of the first heat exchanger and the second heat exchanger, and flows out of the outdoor heat exchanger through the other one of the first heat exchanger and the second heat exchanger both in the cooling mode and in the heating mode.

A heat pump system includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger connected in sequence to form a refrigerant main circuit. The outdoor heat exchanger includes at least one double-rowed heat exchanger. The heat pump system has a cooling mode and a heating mode, and further includes a switching unit. The switching unit is connected in the refrigerant main circuit, and switches a flow direction of a refrigerant, such that the refrigerant flows into the outdoor heat exchanger through one of the first heat exchanger and the second heat exchanger, and flows out of the outdoor heat exchanger through the other one of the first heat exchanger and the second heat exchanger both in the cooling mode and in the heating mode.

A refrigerator includes a main body that has a storage chamber and a drying chamber; a thermoelectric module that includes a heat absorber and a heat dissipater; a cooling fan that circulates air in the storage chamber to the heat absorber and the storage chamber; a heat-dissipating fan that blows air to the heat dissipater; an air guide that has a passage for guiding air heated by the heat dissipater to the drying chamber; a heater that is disposed in the passage; and a damper that controls a flow of air in the passage between the heat-dissipating fan and the heater. Heat of the heat dissipater transfers to the drying chamber through the passage of the air guide and the damper, thereby being able to dry an object to be dried.

In an example, a print device comprises: a heat pump (102) to extract heat from a fluid source to produce cooled fluid and to transfer the heat from the fluid source to heat a print material (108), wherein the cooled fluid is used to cool a component (106) of the print device.

The invention provides a heat pump system and method comprising a Shape-Memory Alloy (SMA) or Negative Thermal Expansion (NTE) core (2a, 2b) positioned in a housing and adapted to absorb heat and store energy in response to a first fluid inputted at a first temperature. The housing is configured to receive a second fluid via an inlet wherein a device changes pressure in the housing to cause the SMA or NTE core to change state to release the heat absorbed into the second fluid. An outlet is adapted to output the second fluid at a higher temperature than the first temperature.

A refrigeration cycle apparatus includes a refrigerant circuit in which a compressor, a first heat exchanger, an expansion mechanism, and a second heat exchanger are connected by pipes. The first heat exchanger includes a first refrigerant passage and a second refrigerant passage that share a plurality of fins with each other and provided in parallel in the refrigerant circuit. The apparatus further includes a high-and-low-pressure switching mechanism which is located on an inlet side of the second refrigerant passage of the first heat exchanger in flowing of refrigerant in an operation in which the first heat exchanger functions as a condenser, and which performs switching between flow directions of the refrigerant. The apparatus further includes a refrigerant blocking mechanism located on an outlet side of the second refrigerant passage of the first heat exchanger in the flowing of the refrigerant in the operation, and which blocks the flowing of the refrigerant.

The present invention provides a metal-organic framework which can both adsorb water vapor in low relative humidity and reduce the magnitude of the humidity difference between the adsorption humidity and the desorption humidity.

A metal organic framework wherein the metal ion is an aluminum ion, a first ligand is an organic compound ion consisting of a first heterocycle having two carboxyl groups, and a heteroatom composing the first heterocycle is present on the minor angle side of the angle created by the two carboxyl groups, a second ligand is different than the first ligand, is an organic compound ion consisting of a second heterocycle having two carboxyl groups, and a heteroatom composing the second heterocycle is present on the major angle side of the angle create by the two carboxyl groups, and a third ligand is different than the first ligand and the second ligand, is an organic compound ion having two carboxyl groups, and the first ligand, second ligand, and third ligand are present in a specific ratio.

The present invention provides a metal-organic framework which can both adsorb water vapor in low relative humidity and reduce the magnitude of the humidity difference between the adsorption humidity and the desorption humidity.

A metal organic framework wherein the metal ion is an aluminum ion, a first ligand is an organic compound ion consisting of a first heterocycle having two carboxyl groups, and a heteroatom composing the first heterocycle is present on the minor angle side of the angle created by the two carboxyl groups, a second ligand is different than the first ligand, is an organic compound ion consisting of a second heterocycle having two carboxyl groups, and a heteroatom composing the second heterocycle is present on the major angle side of the angle create by the two carboxyl groups, and a third ligand is different than the first ligand and the second ligand, is an organic compound ion having two carboxyl groups, and the first ligand, second ligand, and third ligand are present in a specific ratio.