Nano refrigerant hydrate phase change cold-storage working substance and preparation thereof

Abstract

The invention provides a nano-refrigerant hydrate phase change cool-storage refrigerant and a preparation method thereof; surfactant is dissolved in water to prepare the water solution of the surfactant; subsequently, the refrigerant is dripped into the water solution of the surfactant and mixed till that the solution is changed from turbidity to brightness. According to the solubility of the surfactant in water and in the refrigerant, the surfactant can be dissolved in the water and can also be dissolved in the refrigerant. Under static state, the water phase and the refrigerant phase are uniformly mixed in microscopic scale to augment the two-phase diffusion interface, thus promoting the growth of the hydrate crystal. The system can lead the water phase and the refrigerant phase to be mixed uniformly without applying mixing, disturbing and external field; the refrigerant phase is dispersed in water in the form of micelle or (and) microemulsion; and alternatively, the water phase is dispersed in the refrigerant phase in the form of micelle or (and) microemulsion; the dripping size of the dispersing phase is 100nm or less. The hydrate phase change cool-storage refrigerant does not delaminate after being placed for a long time, is single-dispersion system with stable thermal-mechanics performance and has the appearance of transparent or semi-transparent solution.

Description

technical field [0001] The invention relates to a phase-change cold storage working medium that can work under static conditions and a preparation method thereof, in particular to a nano-refrigerant hydrate phase-change cold storage working medium that can be used for cold storage air conditioners and small-scale refrigeration equipment in a corresponding temperature range and its preparation method. technical background [0002] In today's shortage of energy and electricity, using the phase change latent heat of phase change materials to store energy is a new energy-saving and environmental protection technology. The use of cold storage technology can practice the shifting of power peaks and flat valleys, that is, to use the surplus power and capacity to store cold energy in the cold storage medium, and then release the cold energy during the peak period of cold use to meet the needs of users' cooling load, thereby alleviating energy and energy consumption. The contradicti...

AI Technical Summary

Problems solved by technology

However, these methods all use mechanical stirring and disturbance to achieve mixing of the water phase and the hydration medium, and the formed rough mixed system is a thermodynamically unstable system. Once the external force is removed, the mixed system will spontaneously produce phase separation, and the resulting Added additives such as surfactants, nanoparticles, etc. are difficult to distribute evenly in the two-phase system. Even in the case of adding additives, external stirring or circulation must be continuously applied to promote the mixing of the two phases. The presence or absence of this external force and continuous The degree of mixing of the two phases is greatly affected, the contact between the two phases is limited, and the uncertainty of the area of ​​the two-phase interface is large.

In addition, the external mechanical shear force, electromagnetic field and ultrasonic wave will greatly increase the cost of equipment and energy consumption.

These all limit the practical application of refrigerant gas hydrate cold storage technology

According to the literature, there is no method to make the refrigerant and water form a homogeneous mixed system without stirring or external field assistance.

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