Low-temperature refrigeration and cold storage system capable of efficiently utilizing solar energy

Abstract

The invention relates to a low-temperature refrigeration and cold storage system capable of efficiently utilizing solar energy. The system comprises a compressor (1), a condenser (2), a liquid storage tank (3), an intercooler (4), an evaporator (5), a cooler (6), a first adsorption bed (101), a second adsorption bed (102) and a cold storage adsorption bed (11), wherein, in the daytime refrigeration / cold storage mode, solar energy is utilized to enable the first adsorption bed and the second adsorption bed to work alternately to achieve refrigeration, meanwhile, the cold storage adsorption bed carries out desorption reaction under the suction adjustment effect of the compressor to complete cold storage step by step, and in the night cold release mode, the cold storage adsorption bed continuously adsorbs refrigerants to achieve continuous refrigeration. Compared with the prior art, the compressor is introduced to adjust the desorption pressure of the adsorption bed and reduce the desorption temperature, so that the system actively adapts to the fluctuating solar hot water temperature, and low-temperature desorption and heat absorption are realized; and meanwhile, under the assistance of desorption reaction of the adsorption bed, suction pressure of the compressor is increased, pressure ratio of the compressor is reduced, power consumption of the compressor is reduced, and refrigeration energy efficiency is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration and cold storage, in particular to a low-temperature refrigeration and cold storage system for efficiently utilizing solar energy. Background technique [0002] Fruits and vegetables are essential food in daily life, but they are generally difficult to store for a long time. The low-temperature storage in the place of origin can take away the ground heat of fruits and vegetables in time, reduce respiratory heat, prolong the storage period, and reduce the loss of fruits and vegetables from spoilage. At the same time, due to the distribution of It is difficult to realize the centralized management of the power supply station, and there are few power points, unstable voltage quality, weak power supply capacity and long transmission lines leading to a large amount of power loss. It is difficult to meet the power supply demand for timely refrigeration of agricultural products. [0003] Low-temper...

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Problems solved by technology

This invention patent adopts traditional vapor compression refrigeration device for refrigeration, but still faces the problems of high power consumption and low refrigeration energy efficiency caused by low evaporation temperature, and the solar photoelectric conversion efficiency is low, so the required solar panel area is large, and the solar panel is expensive , the initial cost of the system is high

In addition, an ice storage device is used, which is characterized by a constant cooling temperature and cannot flexibly adjust the cooling temperature required by the cold storage

[0006] As we all know, the conversion efficiency of solar energy to heat is much higher than that of photoelectric conversion, and the cost of solar collectors is much lower than that of solar panels. It is difficult for the appliance to obtain such high-temperature hot water

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