Steel slag-based binary composite phase change material capable of melting snow and removing ice and preparation method of steel slag-based binary composite phase change material

A composite phase change material and a technology for phase change materials, which are applied in the field of steel slag-based binary composite phase change materials and their preparation, can solve the problems of difficult repair of heating devices, corroded road surfaces, long periods of time for melting snow and deicing, etc., so as to alleviate the cycle Effect of thermal stress damage, preventing environmental temperature drop, and avoiding thermal fatigue cracks

Pending Publication Date: 2022-01-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, snow melting and deicing measures can be summarized into two categories. One is traditional passive snow melting and deicing measures, such as mechanical deicing and snow removal or spraying chemical salts to remove deicing snow, but mechanical equipment will seriously scratch the road surface, and chemical salts will seriously pollute environment, corroded pavement
The other type is new active snow melting and deicing measures, such as electric heating pavement with built-in heating unit, circulating hot fluid pavement, etc. However, the time period for snow melting and deicing of these functional pavements is long, the initial construction investment cost is huge, and the heating device is damaged. Not easy to repair, difficult to promote and apply on a large scale
[0005] With the application of phase change materials, there are more and more researches on the application of composite phase change materials to road surface snow melting and deicing, such as the application number 201610388942. Asphalt and its preparation method", by determining the ratio of composite phase change materials and mixing asphalt materials to prepare phase change energy storage and heat release materials for snow and ice on roads in cold winter weather, but the material limits the complex phase change materials In the actual road service process, due to the different winter ambient temperatures in various places, a single ratio of composite phase change materials cannot fully adapt to all winter temperature environments. For this type of composite phase change materials The usage restrictions are relatively large, and it is not convenient for actual large-scale promotion and application

Method used

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  • Steel slag-based binary composite phase change material capable of melting snow and removing ice and preparation method of steel slag-based binary composite phase change material
  • Steel slag-based binary composite phase change material capable of melting snow and removing ice and preparation method of steel slag-based binary composite phase change material
  • Steel slag-based binary composite phase change material capable of melting snow and removing ice and preparation method of steel slag-based binary composite phase change material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A steel slag-based binary composite phase change material capable of melting snow and deicing:

[0041] 1. Select phase change material A as n-dodecane, with a melting point of -9.6°C and a latent heat of phase change of 142J / g, and phase change material B as n-tetradecane with a melting point of 5.5°C and a latent heat of phase change of 227J / g. According to the mass ratio of n-dodecane to n-tetradecane M1:M2=90:10; 80:20; 70:30; 60:40; 50:50; 40:60; 30:70; 20:80; 10: 90 were blended to obtain nine groups of samples, through Calculate the eutectic point of n-dodecane and n-tetradecane binary composite phase change materials, the calculation results are as follows figure 1 As shown, the optimum mass ratio of n-dodecane to n-tetradecane M1:M2=76:24 is obtained at the eutectic point of -15.2°C.

[0042] pass meter Calculate the phase change latent heat of n-dodecane and n-tetradecane binary composite phase change materials, and the calculation result is 43.06J / g, so ...

Embodiment 2

[0051] A steel slag-based binary composite phase change material capable of melting snow and deicing:

[0052] 1. Select phase change material A as n-tetradecane, melting point is 5.5°C, latent heat of phase change is 227J / g, phase change material B is n-hexadecane, melting point is 18°C, latent heat of phase change is 217J / g, according to The mass ratio of n-tetradecane to n-hexadecane M1:M2=90:10; 80:20; 70:30; 60:40; 50:50; 40:60; 30:70; 20:80; 10:90 Nine groups of samples were obtained by blending respectively. Calculate the eutectic point of n-tetradecane and n-hexadecane binary composite phase change materials, the calculation results are as follows figure 2 As shown, the optimum mass ratio of n-tetradecane to n-hexadecane M1:M2=69:31 is obtained at the eutectic point of 0.83°C.

[0053] pass meter Calculate the phase change latent heat of n-dodecane and n-tetradecane binary composite phase change materials, and the calculation result is 27.41J / g, so that it can me...

Embodiment 3

[0059] A steel slag-based binary composite phase change material capable of melting snow and deicing:

[0060] 1. Select phase change material A as n-tetradecane, with a melting point of 5.5°C and a latent heat of phase change of 227J / g, and phase change material B as n-octadecane with a melting point of 28.13°C and a latent heat of phase change of 246.29J / g. According to the mass ratio of n-tetradecane to n-octadecane M1:M2=90:10; 80:20; 70:30; 60:40; 50:50; 40:60; 30:70; 20:80; 10: 90 were blended to obtain nine groups of samples, through Calculate the eutectic point of n-tetradecane and n-octadecane binary composite phase change materials, the calculation results are as follows image 3 As shown, the optimum mass ratio of n-tetradecane to n-octadecane M1:M2=86:14 is obtained at the eutectic point of 4.2°C.

[0061] pass Calculate the phase change latent heat of n-tetradecane and n-octadecane binary composite phase change material, and the calculation result is 157.97J / ...

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Abstract

The invention provides a steel slag-based binary composite phase change material capable of melting snow and removing ice and a preparation method of the material, and relates to the technical field of civil engineering materials. The steel slag-based binary composite phase change material is mainly prepared by fully mixing a phase change material A and a phase change material B according to a mass ratio of M1: M2, introducing a certain amount of the composite phase-change material into the steel slag particles by using a heating introduction method or a vacuumizing introduction method; and wrapping the steel slag particles adsorbed with the composite phase change material with cement mortar to obtain the composite phase change material. According to the technical scheme, the defects in the prior art are overcome, the steel slag-based binary composite phase-change material with different target phase-change temperatures and phase-change latent heat is obtained by changing the blending type and proportion of the two organic phase-change materials, and the steel slag-based binary composite phase-change material can meet the snow melting and deicing requirements of different regions under the winter air temperature conditions; steel slag can be reused in a functional way, and the material not only is green and environment-friendly, but also has remarkable economic benefits.

Description

technical field [0001] The invention relates to the technical field of civil engineering materials, in particular to a steel slag-based binary composite phase change material capable of melting snow and deicing and a preparation method thereof. Background technique [0002] With the rapid increase of the world's population and the high development of productivity, there is a huge demand for energy. Overexploitation of limited fossil energy has caused global energy shortage and ecological environment damage. Clean and renewable energy sources such as solar energy are attracting more and more attention. However, the intermittent problem of renewable energy makes it impossible to be developed and utilized on a large scale as a stable and continuous energy source. Phase change materials can store excess energy and release it when needed, which is the key to alleviating the mismatch between energy supply and demand. Civil engineering is a key field in the construction of moder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K3/18
CPCC09K5/063C09K3/185
Inventor 张德润许培欣余培苗雨张恺李荣清王丽静
Owner HUAZHONG UNIV OF SCI & TECH
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