Inorganic phase-change material used for air conditioner cold accumulation and preparation method thereof

Abstract

The invention discloses an inorganic phase-change material used for air conditioner cold accumulation. The inorganic phase-change material comprises the following components in parts by weight: 75 to80 parts of sodium sulfate decahydrate, 7 to 10 parts of ammonium chloride, 2 to 4 parts of borax, 5 to 8 parts of hydrophilic fumed silica, 2 to 4 parts of a pH conditioning agent and 0.1 to 0.5 partof conductive particles. The preparation method comprises the following steps: (1) adding sodium sulfate decahydrate and ammonium chloride into a mixer, simultaneously heating and stirring, warming and heating to 40 to 50 DEG C; (2) adding the pH conditioning agent and borax, and stirring at a constant temperature until borax is completely dissolved; and (3) adding hydrophilic fumed silica into the mixer, stirring at the constant temperature and low speed, then adding the conductive particles, and then stirring at high speed to prepare the phase-change material. The phase-change temperature of the inorganic phase-change material used for air conditioner cold accumulation is 7 to 9 DEG C, the phase-change latent heat of the inorganic phase-change material used for air conditioner cold accumulation is 135 to 198 J / g, and the inorganic phase-change material is free of obvious corrosion to aluminum, stainless steel and copper respectively.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to an inorganic phase change material used for air-conditioning cold storage and a preparation method thereof. Background technique [0002] Cold storage means that at night when the power grid is at a low point, the refrigeration host starts to cool and the cold storage equipment stores the cold energy, and then releases the cold energy to meet the peak air-conditioning load during the peak power consumption time of the daytime grid. In this way, most of the power consumption of the refrigeration system occurs during the low power consumption period at night, and only auxiliary equipment is running during the peak power consumption during the day, so as to realize the "peak shifting and valley filling" of power consumption. Air-conditioning cold storage technology can effectively use electric energy and produce good economic and social benefits. [0003] At present, a...

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Problems solved by technology

[0006] In order to solve the defects that the inorganic phase change materials in the prior art have high phase change latent heat, are non-flammable, cheap and easy to obtain, but have leakage and corrosion problems, the present invention provides an inorganic phase change material for air-conditioning cold storage Materials and their preparation methods

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