Study on heat storage performance of shape-stable carbide slag skeleton phase change material

doi:10.3969/j.issn.2097-0706.2022.04.009

Abstract

Abstract:

Calcium carbide slag is an industrial solid waste associated with the production of acetylene,and a large number of accumulations pollute the environment.Under the background of carbon neutralization,calcium carbide slag-based composite phase change heat storage material was prepared by cold compression-hot sintering method with calcium carbide slag as skeleton material and NaNO₃ as phase change material for resource utilization of solid waste.The material was characterized by X-ray diffraction（XRD）,thermogravimetry-differential scanning calorimetry（TG-DSC） and laser thermal conductivity analysis（LFA）.The results showed that the composite had good chemical compatibility.When the mass ratio of NaNO₃ to carbide slag was 5∶5,various thermophysical properties were the best,which was the best ratio.Under this ratio,the maximum thermal conductivity of the composite was 0.18 W/（m∙K）,and the thermal storage density was 457.2 J/g at 50~500 °C,which showed good thermal storage performance.

Key words: solid waste, calcium carbide slag, framework material, phase change materials, thermal energy storage, cold compression-hot sintering method, carbon neutrality

CLC Number:

TK02

XIONG Yaxuan, WANG Huixiang, HU Ziliang, YAO Chenhua, SONG Chaoyu, DING Yulong. Study on heat storage performance of shape-stable carbide slag skeleton phase change material[J]. Integrated Intelligent Energy, 2022, 44(4): 71-75.

Figures/Tables 8

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项目	复合材料
项目	CC1	CC2	CC3	CC4	CC5	CC6	CC7
ω(NaNO₃)/%	70.0	60.0	57.5	55.0	52.5	50.0	40.0
ω(电石渣)/%	30.0	40.0	42.5	45.0	47.5	50.0	60.0
ω(PVA)/%	3.0	3.0	3.0	3.0	3.0	3.0	3.0
烧结后材料外观	S	L	L	L	L	N	N