A three-phase heat exchanger and its absorption refrigeration system

Abstract

The invention relates to a three-phase heat exchanger and an absorption refrigeration system thereof, belonging to the technical field of refrigeration systems, comprising a shell-side cylinder and two tube-side cylinders, the two tube-side cylinders are connected through heat exchange tubes, and the shell There are shell-side inlets and outlets on the shell-side cylinder, two tube-side inlets and two tube-side outlets on the two tube-side cylinders, and tube-side partitions between the tube-side inlets and outlets of each tube-side cylinder , separate the heat exchange tubes into two independent tube-side passages. The three-phase heat exchanger and its absorption refrigeration system of the present invention are more compact in structure than the existing absorption refrigeration system using two ordinary heat exchangers, saving floor space and space, and adopting tube-and-tube heat exchange device, easy to manufacture. The distribution ratio between the two tubes is achieved through the different positions of the tube-side partitions, and the design and calculation are simple and the heat exchange efficiency is higher. Through the design of the inlet and outlet, the heat exchange process is fully countercurrent, and the heat exchange efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of refrigeration systems, in particular to a three-phase heat exchanger and an absorption refrigeration system thereof. Background technique [0002] The absorption refrigeration unit is mainly composed of generators, absorbers, evaporators and other heat exchangers, pumps, valves, etc., and realizes refrigeration through the phase change of the working fluid (such as ammonia). [0003] Currently common absorption refrigeration units, such as figure 1 As shown, it includes an absorber, an intermediate heat exchanger, a generator, a condenser, a gas-liquid heat exchanger, and an evaporator, and the rich solution output of the absorber is connected to the rich solution input of the generator through a rich solution pipeline , the lean solution output end of the generator is connected with the lean solution input end of the absorber through the lean solution pipeline, and the ammonia gas output end of the gene...

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Problems solved by technology

[0005] 1. The temperature of the rich solution after heat exchange through the intermediate heat exchanger is still lower than the temperature in the generator, and a large amount of heating is still required after reaching the generator

[0006] 2. The ammonia gas from the generator needs to be cooled by the condenser, and the cooling capacity is relatively large

[0007] In order to solve the contradiction that the above-mentioned rich solution needs to be heated and ammonia needs to be cooled, a three-phase heat exchanger can be used to replace the intermediate heat exchanger of the original process, but the conventional three-phase heat exchanger is mostly a coiled heat exchanger, which is difficult to process Large, complex design, not suitable for application in absorption refrigeration systems

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