CO2 absorption refrigerator driven by solar energy

An absorption refrigerator, solar energy technology, applied in the field of refrigerators in the field of refrigeration technology, can solve problems such as restricting the development of refrigeration technology and demanding compressor requirements, and achieve the effects of compact structure, environmental friendliness, and good application prospects.

Active Publication Date: 2014-05-07
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But using CO 2 As the working fluid of the vapor compression cycle, CO 2 Compressed to a pressure above 10MPa, the r

Method used

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  • CO2 absorption refrigerator driven by solar energy
  • CO2 absorption refrigerator driven by solar energy
  • CO2 absorption refrigerator driven by solar energy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 Is a solar-driven CO of the present invention 2 The schematic diagram of the structure of embodiment 1 of the absorption chiller; it can be seen from the figure that the solar-powered CO of this embodiment 1 2 Absorption refrigerator, which includes:

[0030] The absorber 1, the booster pump 2, the solar generator 3, the decompression element 5 and the evaporator 6, which are connected in sequence and form a refrigeration circuit, and the connecting pipe connected between the absorber 1 and the solar generator 3 On the flow control valve 7 on the road, the evaporator 6 is connected to the absorber 1; the upper end of the solar generator 3 is equipped with a light-transmitting element 4; the inlet of the booster pump 2 is connected to the absorber 1, and the booster The outlet of the pressure pump 2 is connected to the generator 3; a flowing working medium circulates in the refrigeration circuit; a light-transmitting element 4 is installed at the upper end of the so...

Embodiment 2

[0033] figure 2 Is another solar-driven CO of the present invention 2 Schematic diagram of the structure of an absorption chiller (Example 2). It can be seen from the figure that the difference between Embodiment 2 and Embodiment 1 is that a regenerator 8 is added, that is, the regenerator 8 is installed on the connecting pipeline between the solar generator 3 and the pressure reducing element 5; The two ends of the regenerator 8 are also communicated with the evaporator 6 and the absorber 1 respectively. Because of CO 2 The critical point temperature of the evaporator is relatively low. If it is throttling and cooling at room temperature, it is difficult to produce a better cooling effect. Therefore, in this embodiment, the temperature and pressure from the evaporator 6 are relatively low. 2 Flow through the regenerator 8, so that the high-pressure CO 2 The gas is cooled below room temperature and then expanded under reduced pressure, so that CO 2 Achieve better cooling effect...

Embodiment 3

[0035] image 3 Is another solar-driven CO of the present invention 2 Schematic diagram of the structure of an absorption refrigerator (embodiment 3); the structure of this embodiment basically adds a regenerator 8, a nozzle 9 and an ejector 10 in the structure of the embodiment 1; the regenerator 8, the nozzle 9 and the ejector The evaporator 10 is connected to the connecting pipeline from the solar generator 3 to the pressure reducing element 5 in sequence, and the inlet of the ejector 10 is connected to the evaporator 6; The decompression element 5 is in communication with the absorber 1. Because the cooling efficiency of the simple throttling and decompression process is low, the nozzle 9 and the ejector 10 are sequentially installed on the connecting pipeline between the generator 3 and the decompression element 5 in this embodiment; high-pressure CO 2 After the gas is cooled by the regenerator 8, the gas first flows through the nozzle 9, and then CO 2 The temperature of t...

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Abstract

A CO2 absorption refrigerator driven by solar energy comprises an absorber, a boosting pump, a solar generator, a pressure reduction element, an evaporator, an absorber and a flow control valve communicated with a connecting pipe between the absorber and the solar generator, wherein the absorber, the boosting pump, the solar generator, the pressure reduction element, the evaporator and the absorber are sequentially connected and form a refrigeration loop, a transmitting element is installed at the upper end of the solar generator, and the evaporator is connected with the absorber. A flowing working medium circulates in the refrigeration loop and is mixed solution composed of CO2 and naphthyridine derivatives. The mixed solution of CO2 and absorbents in the absorber is pressurized through the boosting pump and enters the solar generator; by solar radiation, CO2 is separated from the absorbents and enters the evaporator by pressure reduction of a flow regulator to have refrigeration effect, and the remaining absorbents return to the absorber again; and CO2 absorbs heat and gasified in the evaporator, returns to the absorber again and is dissolved in the absorbents. CO2 is adopted to serve as the working medium of the absorption refrigerator, and the absorption refrigerator is free of toxicity and explosiveness, is high in specific power and environmentally friendly and saves energy.

Description

Technical field [0001] The invention relates to a refrigerator in the technical field of refrigeration, in particular to a solar-driven CO 2 Absorption refrigerator. technical background [0002] In nature, CO 2 It is one of the most abundant chemical substances. It is part of the atmosphere and is also contained in some natural gas or oilfield associated gas and carbonate-formed ores. CO in the atmosphere 2 0.03~0.04wt%, the total amount is about 2.75×10 12 Tons are mainly produced by the burning of carbonaceous materials and animal metabolism. Therefore, CO 2 It is a natural working fluid, which will not affect the environment, will not burn or explode, and is easy to obtain. Current CO 2 Research as a refrigerant is mainly concentrated in vapor compression refrigerators. As refrigerants such as Freon gradually withdraw from the stage of history, CO 2 As an excellent refrigerant, it has gradually become a research hotspot of vapor compression refrigeration. But using CO 2 As ...

Claims

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Application Information

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IPC IPC(8): F25B27/00F25B15/02F25B40/06
CPCY02A30/27Y02B30/62
Inventor 胡剑英罗二仓付文甫
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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