An absorption subcooler comprises a first heat exchanger operable to receive refrigerant from a compressor of a refrigeration system and apply a first cooling stage to the refrigerant. The absorption subcooler is further operable to discharge the refrigerant to a gas cooler operable to apply a second cooling stage to the refrigerant.

A machine quantity controlling device which controls a quantity of a heat source device to operate in a heat source system including a first heat source device and a second heat source device, the first heat source device being a waste heat recovery type absorption chiller, the second heat source device other than a waste heat recovery type absorption chiller, the machine quantity controlling device including an acquisition unit that obtains a waste heat utilization maximum load which is a maximum load when the first heat source device receives only supply of the waste heat; a determination unit that determines a predetermined load range from the waste heat utilization maximum load to be a first optimal load range as an optimal load range of the first heat source device; and a machine quantity control unit that controls a quantity of the second heat source device to operate so that the sum of a total of minimum values of the optimal load range of the first heat source device to operate and a total of minimum values of a second optimal load range of the second heat source device to operate is smaller than or equal to a load required for the heat source system, and the sum of a total of maximum values of a first optimal load range and a total of maximum values of the second optimal load range is equal to or greater than the load required for the heat source system, the second optimal load range being an optimal load range of the second heat source device to operate.

An apparatus and corresponding method for heat exchange. The heat exchange apparatus may include an adsorber device. The adsorber device is configured to draw heat from a first heat reservoir and transfer heat to a first heat sink. The heat exchange apparatus may include a heat exchanger fluidly connected to the adsorber device by the working fluid. The heat exchanger transfers heat to a second heat sink. The heat exchange apparatus may include an expansion device fluidly connected to the heat exchanger by the working fluid. The expansion device expands the working fluid, and exchanges heat with a second heat reservoir. The expansion device includes a turbine device for converting at least a part of an exergy of the working fluid during expansion into mechanical work. The heat exchange apparatus may include the adsorber device being fluidly connected to the expansion device by the working fluid.

A device is provided for the autonomous production of refrigeration approximately 40 C. lower than ambient temperature from a low-temperature solar thermal source, the device including: (i) a reactor arranged to cool and/or heat the solid reagent; (ii) a condenser; (iii) a first tank for storing the liquid refrigerant at ambient temperature; (iv) an enclosure arranged to store a phase-change material and also including an evaporator; (v) a second tank for storing the liquid refrigerant at a low temperature; (vi) apparatus for conveying the refrigerant and (vii) apparatus for controlling the flow of the refrigerant.

The solar-powered LiBr-water absorption air conditioning system using hybrid storage includes one or more solar collectors generating heat energy to drive the system. The solar collector communicates with a generator to heat an aqueous LiBr solution and release refrigerant through vaporization. The refrigerant feeds into a condenser to form a refrigerant condensate. The condensate feeds into an evaporator, which throttles the refrigerant and causes flash vaporization, resulting in cooling discharged into a load. The refrigerant from the evaporator feeds into an absorber containing a weak LiBr-water mixture from the generator to facilitate absorption of the refrigerant. A pump feeds the resultant aqueous LiBr solution back to the generator for another cycle. The hybrid storage includes a combination of heat storage tank, refrigerant storage tank, and/or a cold water tank coupled to the generator, condenser, and the evaporator to supplement driving or additional cooling during nighttime for continuous daily operation.

An intermittent operation based continuous absorption system (IOBCAS) which supports cooling effect during the daytime without the use of a solution pump is provided. The IOBCAS may utilize an isochoric process for pressurization of the system and the system may include a plurality of generator-absorber units that intermittently operate in succession to provide a continuous refrigeration cooling effect during the daytime. The system of the present disclosure enables the plurality of generator-absorber units to switch between a generation, absorption, and heat recovery mode of operation to provide cooling effect during the daytime which a higher coefficient of performance compared with conventional intermittent system.

A solar powered absorption cooling system employing refrigerant-absorbent solutions such as water and lithium bromide and hybrid storage capabilities, and a method of employing the system in refrigeration and air conditioning units. The system includes a first temperature control valve and second temperature control valve that together regulate the flow of solar heating fluid into the generator and substantially reduce absorbent crystal formation.

A solar powered absorption cooling system employing refrigerant-absorbent solutions such as water and lithium bromide and hybrid storage capabilities, and a method of employing the system in refrigeration and air conditioning units. The system includes a first temperature control valve and second temperature control valve that together regulate the flow of solar heating fluid into the generator and substantially reduce absorbent crystal formation.

A solar powered absorption cooling system employing refrigerant-absorbent solutions such as water and lithium bromide and hybrid storage capabilities, and a method of employing the system in refrigeration and air conditioning units. The system includes a first temperature control valve and second temperature control valve that together regulate the flow of solar heating fluid into the generator and substantially reduce absorbent crystal formation.

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.