Organic-inorganic composite phase-change energy-storage gypsum building block

Abstract

The invention discloses an organic-inorganic composite phase-change energy-storage gypsum building block. The organic-inorganic composite phase-change energy-storage gypsum building block comprises a coal-series kaolin-based composite phase-change material, desulfurated building gypsum and a foaming agent, wherein the mass of the coal-series kaolin-based composite phase-change material is 3 to 20% of the total mass of the organic-inorganic composite phase-change energy-storage gypsum building block, and the mass of the foaming agent is 0.1 to 1.0% of the total mass of the organic-inorganic composite phase-change energy-storage gypsum building block. The coal-series kaolin-based composite phase-change material comprises 80 to 95% of coal-series kaolin and 5 to 20% of an organic phase-change material which is a binary complex of decanoic acid and lauric acid, wherein a decanoic acid mass percentage is in a range of 10 to 90%. The binary complex of decanoic acid and lauric acid has a phase-change temperature of 19 to 27 DEG C, and phase-change latent heat of 156.9 to 206.4KJ / Kg. A primary intercalation material of the coal-series kaolin is hydrazine. The organic phase-change material is inserted between layers of the coal-series kaolin through secondary intercalation replacement. The organic-inorganic composite phase-change energy-storage gypsum building block has the advantages of low price, low heat conduction coefficient, moderate phase-change temperature, large volume latent heat and low energy consumption.

Description

Technical field: [0001] The invention relates to the field of building energy storage composite materials, in particular to an organic-inorganic composite phase change energy storage gypsum block. Background technique: [0002] In recent years, the state has stepped up energy-saving and emission-reduction measures. The coal-fired power plants have installed nearly 150 million kilowatts of desulfurization units, and the by-product flue gas desulfurization gypsum output is nearly 30 million tons. Therefore, the by-product desulfurization gypsum is huge and growing rapidly. However, the utilization rate of desulfurized gypsum in my country is still very low at present, and the utilization amount is very small, most of which are piled up. Its utilization has an important impact on environmental protection and sustainable development. [0003] In my country, building energy consumption exceeds a quarter of the total energy consumption of the society. Therefore, building energy co...

AI Technical Summary

Problems solved by technology

Both organic phase change materials and inorganic phase change materials have their own advantages and disadvantages: organic phase change materials have a wide range of phase transition temperatures, high heat of fusion, no supercooling phenomenon, consistent melting, good compatibility with traditional building materials and no separation, However, the thermal conductivity is low, the volume latent heat is small, and it is flammable; while the inorganic phase change material has a large volume latent heat, severe phase change, high thermal conductivity, and is non-flammable, and the price is low, and the raw materials are easy to obtain, but the volume change is large and there is supercooling And easy to separate from traditional building materials

Carriers or adsorbents such as expanded graphite and porous graphite are relatively expensive, and the process of adsorbing organic phase change materials is complex and time-consuming, which is not suitable for large-scale promotion

Images