Low-supercooling-degree gel cold accumulation agent

The invention provides a preparation method of a low-supercooling-degree gel cold accumulation agent used for general freezing. The low-supercooling-degree gel cold accumulation agent is prepared from sodium chloride, ammonium chloride, sodium dodecyl sulfate, sodium carboxymethylcellulose and nano-copper powder. Compared with an organic working medium cold accumulation agent, the low-supercooling-degree gel cold accumulation agent prepared with the method can increase the unit cold accumulation capacity by about 25%, and the unit cold accumulation capacity is remarkably increased. In addition, the low-supercooling-degree gel cold accumulation agent is designed to be gel-shaped, relatively high in viscosity and small in thermal expansion coefficient of unit degree centigrade. The low-supercooling-degree gel cold accumulation agent can be made into different shapes along with change of a device, thereby having wide adaptability.