A carbon dioxide/co-fluid mixture is provided for use in a refrigeration cycle in which the carbon dioxide is alternately absorbed and desorbed from the co-fluid. Suitable co-fluids are selected from the class of alkoxylated carboxylic amides, wherein the amides are cyclic or non-cyclic. It has been discovered that N-2,5,8,11-tetraoxadodecyl-2-pyrrolidinone and its homologs exhibit an advantageous property of a high rate of desorption at lower temperatures.

The self-driving heat compression-type heat pump refrigerating method includes preparing high-temperature steam with condensed heat generated by a heat compression-type heat pump refrigerating circulation system. The heat generated during circulation is a driving heat source for heat compression-type heat pump refrigerating circulation system to drive the heat compression-type heat pump refrigerating circulation system. By consuming only a very small amount of electricity, the driving steam is prepared by using condensing heat generated by refrigerating media steam. The heat generated during the circulation of a system itself is used as a driving heat source, realizing refrigerating and heating.

The self-driving heat compression-type heat pump refrigerating method includes preparing high-temperature steam with condensed heat generated by a heat compression-type heat pump refrigerating circulation system. The heat generated during circulation is a driving heat source for heat compression-type heat pump refrigerating circulation system to drive the heat compression-type heat pump refrigerating circulation system. By consuming only a very small amount of electricity, the driving steam is prepared by using condensing heat generated by refrigerating media steam. The heat generated during the circulation of a system itself is used as a driving heat source, realizing refrigerating and heating.

A method and system for cooling a device (preferably a micro-device), comprising cooling the device by using a lower critical solution temperature (LCST) mixture. Enhancement of heat transfer rates is achieved during phase separation of a two-component system (two-component mixture) with a LCST. Convective heat transfer rates in small diameter pipes and over a vertical (hot) plate are demonstrated.

A method and system for cooling a device (preferably a micro-device), comprising cooling the device by using a lower critical solution temperature (LCST) mixture. Enhancement of heat transfer rates is achieved during phase separation of a two-component system (two-component mixture) with a LCST. Convective heat transfer rates in small diameter pipes and over a vertical (hot) plate are demonstrated.

The invention provides the sectional regenerative third-type absorption heat pump which belongs to low-temperature waste heat utilization and refrigeration technique filed. It mainly comprises four generators, four absorbers, a condenser, an evaporator, a throttle, four solution pumps and four solution heat exchangers. The refrigerant vapor of the first generator is provided for condenser. The refrigerant liquid of condenser is provided for evaporator. The refrigerant vapor of evaporator is provided for the first absorber. The second generator and the second absorber, the third generator and the third absorber respectively form the driving heat sectional regenerative process. The third generator and the third absorber form the waste heat regenerative process. The first absorber, the second absorber and the third absorber supply heat to the condenser. The fourth absorber releases the low temperature heat. The sectional regenerative third-type absorption heat pump is thereby formed.

An in-vehicle absorption heat pump device comprises a regenerator; an in-vehicle heat source heating absorbent in the regenerator; a gas-liquid separator; a condenser condensing gas phase separated from the absorbent; an evaporator evaporating a condensate to form vapor; an absorber for bringing the relatively concentrated absorbent in liquid phase in contact with the gas phase to cause the absorbent to absorb the gas phase and be relatively diluted; an absorbent circulation source circulating the absorbent; a bypass passage connecting a liquid-phase storing portion of the gas-liquid separator and the regenerator while bypassing the absorber; and a bypass transfer source in the bypass passage returning the absorbent in the gas-liquid separator to the regenerator. To dilute absorbent in the absorber, a diluent passage allows the condenser and the absorber to communicate and the condensate in the condenser to be supplied to the absorber through the diluent passage by a dilution element.

An in-vehicle absorption heat pump device comprises a regenerator; an in-vehicle heat source heating absorbent in the regenerator; a gas-liquid separator; a condenser condensing gas phase separated from the absorbent; an evaporator evaporating a condensate to form vapor; an absorber for bringing the relatively concentrated absorbent in liquid phase in contact with the gas phase to cause the absorbent to absorb the gas phase and be relatively diluted; an absorbent circulation source circulating the absorbent; a bypass passage connecting a liquid-phase storing portion of the gas-liquid separator and the regenerator while bypassing the absorber; and a bypass transfer source in the bypass passage returning the absorbent in the gas-liquid separator to the regenerator. To dilute absorbent in the absorber, a diluent passage allows the condenser and the absorber to communicate and the condensate in the condenser to be supplied to the absorber through the diluent passage by a dilution element.

A system comprises on the one hand a spiral plate exchanger coiled around a principal axis of the exchanger, in particular oriented vertically, so as to delimit a first fluid flow channel having a cross section in the shape of a spiral discharging at a first axial extremity of the exchanger at an inlet zone of which the overall size is contained within a crown, and on the other hand a distribution device configured in order to supply in a homogeneous manner the whole of the surface of the said crown with at least a first fluid, in particular a liquid.

A system comprises on the one hand a spiral plate exchanger coiled around a principal axis of the exchanger, in particular oriented vertically, so as to delimit a first fluid flow channel having a cross section in the shape of a spiral discharging at a first axial extremity of the exchanger at an inlet zone of which the overall size is contained within a crown, and on the other hand a distribution device configured in order to supply in a homogeneous manner the whole of the surface of the said crown with at least a first fluid, in particular a liquid.