Method for adjusting phase change temperature of solid-liquid phase change material

Abstract

The invention discloses a method for adjusting phase change temperature of a solid-liquid phase change material. In the method for adjusting the phase change temperature of the solid-liquid phase change material, the solid-liquid phase change material is composed of hexadecane in which a compound agent is added; the compound agent is any one of normal octane, normal nonane, normal heptane, paraxylene and benzene; and the adjustment range of the phase change temperature of the solid-liquid phase change material is 12.4-15 DEG C. The added compound agent can adjust the phase change temperature of the hexadecane, and the phase change temperature can be randomly adjusted in a range of 12.4-15 DEG C. The added compound agent can greatly shorten the complete thawing time of a binary solid-liquid phase change material, and simultaneously the phase change volume change rate of the compounded binary solid-liquid phase change material is not big in change amount as compared with the volume change rate of the hexadecane. As a solid-liquid phase change heat exchange working medium for power generation from ocean thermal gradient energy, the solid-liquid phase change material can meet basic requirements of the heat exchange working medium for power generation from ocean thermal gradient energy.

Description

technical field [0001] The invention belongs to the technical field of composite materials, relates to the technical field of ocean temperature difference energy power generation, and in particular relates to a phase change temperature adjustment method of a solid-liquid phase change material. Background technique [0002] In recent years, people have paid more and more attention to the development of marine resources, marine scientific research and marine environment detection. Therefore, marine observation platforms and related technologies have developed rapidly. The ocean observation platform has the advantages of simple structure, high work efficiency, wide work area, good concealment performance, and strong battery life. It is the main equipment for obtaining information on marine environmental resources. However, the power supply problem of the ocean observation platform has always been the main bottleneck restricting its long-distance and long-term operation. The en...

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Problems solved by technology

However, the power supply problem of the ocean observation platform has always been the main bottleneck restricting its long-distance and long-term operation

The publication number is CN201410291682.6, a solid-liquid phase change heat exchange working medium for ocean temperature difference energy generation and its preparation method. Although the invention can speed up the melting time of hexadecane phase change material by adding high thermal conductivity nanoparticles, but Due to the instability of nanoparticles in phase change materials, it is necessary to solve the problem of unstable dispersion by adding dispersants or ultrasonic vibrations, and the two indicators of phase change temperature and thermal conductivity of phase change materials are carried out step by step. regulation, so the method steps are cumbersome

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