Phase-change material for controlling temperature of cold fresh warehouse and preparation method of phase-change material

By combining calcium chloride hexahydrate-based phase change materials with photovoltaic power supply systems in cold storage, the problems of high energy consumption and insufficient system integration in cold storage are solved, and low energy consumption, stable temperature control and food preservation effects are achieved.

CN120682769APending Publication Date: 2025-09-23CHENGDU PHASE TRANSFORMATION TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510843683.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-23
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

The existing cold storage system relies on power supply from the power grid, has high energy consumption and limited use. The system integration and engineering application of phase change materials in cold storage are insufficient, and there is a lack of specific layout and optimization solutions for the temperature range of 0℃ to 4℃.

Method used

Phase change materials composed of calcium chloride hexahydrate, urea, ammonium chloride, strontium chloride hexahydrate and carboxymethyl cellulose are used, combined with a photovoltaic power supply system and an intelligent control unit. Phase change material modules are installed in the cold storage through modular design, and photovoltaic power generation is used to drive the heat exchange device to absorb heat during the day and release heat at night, thereby achieving stable temperature control.

Benefits of technology

It achieves low-energy and stable temperature control for cold storage, reduces energy consumption by 50%, and can maintain a temperature of 0°C to 4°C in remote areas or without a stable power grid, thereby extending the shelf life of food and reducing operating costs.

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Abstract

The invention discloses a phase-change material for controlling the temperature of a cold fresh warehouse and a preparation method thereof, the phase-change material comprises the following components in percentage by weight: 10-12% of calcium chloride hexahydrate, 5-7% of ammonium chloride, 5-7% of strontium chloride hexahydrate and the balance of carboxymethyl cellulose, and the urea accounts for 10-12% of the weight of the calcium chloride hexahydrate. The strontium chloride hexahydrate accounts for 3%-5% of the weight of the calcium chloride hexahydrate, and the carboxymethyl cellulose accounts for 2%-4% of the weight of the calcium chloride hexahydrate. The phase-change material module is installed on the top and the side face of the cold fresh storage to absorb heat or release heat under the action of the heat exchange device through the change of the solid state and the liquid state, so that the temperature in the cold fresh storage is adjusted, and the blank in the engineering application of the phase-change material cold chain in the prior art is filled up.
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