Fluidize adsorption continuous refrigeration system and method thereof

Abstract

The invention provides a fluidized adsorption continuous refrigeration system and its method, wherein the system comprises a refrigeration part composed of an evaporator (2), a throttle valve (3), a liquid storage tank (4) and a condenser (5), an adsorption part resulting in that an adsorbent adsorbs a refrigerant and is cooled down by the refrigerant, and a desorption part resulting in that the adsorbent is heated up and the refrigerant is desorbed; the adsorption part comprises a venturi tube (1), a compressor (6), an adsorption bed (7) and a gas-solid separator (8); the desorption part comprises a gas-solid separator (9), a vacuum valve (10), a vacuum valve (11), a desorption bed (12), a heat exchanger (14) and a compressor (13); the method comprises a heat-absorbing temperature rise, desorption, circulation, refrigeration, adsorption, recirculation and other steps. The system directly implements heat exchange and material exchange with the refrigerant and the adsorbent, which realizes the simultaneous implementation of heat transfer and mass transfer in order to result in that the capacity of heat transfer and mass transfer is strengthened, and realizes the continuous refrigeration or heating and improves the heat utilization efficiency.

Description

technical field [0001] The invention relates to a fluidized adsorption continuous refrigeration system and a method thereof, belonging to the technical field of adsorption refrigeration. Background technique [0002] At present, adsorption refrigeration technology is increasingly becoming the research focus of people, but there are two major problems in this technology: 1. The porous characteristics of the adsorbent itself make the thermal conductivity small; 2. The contact thermal resistance between the adsorbent and the heat transfer metal wall Larger, when the cold and hot fluid alternately pass through the partition wall heat exchanger (shell-and-tube, spiral plate, plate-fin type) to heat or cool the adsorbent to achieve desorption and adsorption of the refrigerant, the sensible heat of the heat exchanger and the adsorbent itself Variations add additional heat loss. [0003] At present, the main way to solve this problem is to solidify the adsorbent inside or outside t...

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Problems solved by technology

[0002] At present, adsorption refrigeration technology is increasingly becoming the research focus of people, but there are two major problems in this technology: 1. The porous characteristic of the adsorbent itself makes the thermal conductivity small; 2. The contact thermal resistance between the adsorbent and the heat transfer metal wall Larger, when the cold and hot fluid alternately pass through the partition wall heat exchanger (shell-and-tube, spiral plate, plate-fin type) to heat or cool the adsorbent to achieve desorption and adsorption of the refrigerant, the sensible heat of the heat exchanger and the adsorbent itself Variations add additional heat loss

[0004] However, the following problems are: the diffusion resistance of the refrigerant (adsorbate) in the solid adsorbent is relatively large, especially when the adsorbent is solidified to improve the heat transfer coefficient of the adsorbent, and the adsorption resistance of the adsorbent after solidification increase, the thickness of the adsorbent is required not to be too large, and generally needs to be controlled below 5mm

[0007] Although scholars at home and abroad have proposed a rotary adsorption refrigeration system, it still cannot completely overcome the above problems.

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