A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Study on shape-stabilised paraffin-ceramsite composites with stable strength as phase change material (PCM) for energy storage
https://orcid.org/0000-0002-4651-1215
Highlights As an economical and reliable PCM material, paraffin is compatible with ceramsite. Paraffin-impregnated ceramsite has a little leakage issue but paraffin loss value is<3%. The inner structure of ceramsite decides the PCM impregnation and retaining capacity. The pores near the surface of paraffin-impregnated ceramsite particles reduces PCM retention. High porosity of ceramsite is significant but opening distribution is crucial for PCM.
Abstract The massive energy consumption in construction has been a critical challenge for sustainable development. Incorporating phase change material (PCM) into construction materials is an effective way to improve energy management. In this work, the paraffin with a melting point of ∼ 28 °C and latent heat of ∼ 193 J/g was absorbed into fly ash ceramsites (artificial porous aggregate) under vacuum pressure. The ceramsite had sizes ranging from 7 to 13 mm, within the size range of coarse aggregates in concrete. The main properties of the raw ceramsite, paraffin, and paraffin/ceramsite composite were tested using Differential Scanning Calorimetry (DSC), X-Ray Diffraction (XRD), microscope, leakage testing, mechanical testing, etc. The PCM incorporation ratio was 45.33 wt%. This incorporation value is adequate for PCM composite in concrete to show the significant performance of thermal regulation. The leakage test result shows excellent stability of the PCM carrying in the ceramsites. The PCM-ceramsite composites present intact structures under heating and cooling cycles because of the low-volume expansion of paraffin. Solidified PCM inside the ceramsite particles improve the strength of the composites. Microcharacterization indicates that the connected pores/cracks inside the ceramsite particles are the primary path, while unconnected pores have little benefit for PCM incorporation. Small pores have better PCM retaining efficiency, especially if they are located at the sub-deep layer. Large pores provide ample space for PCM but have adverse effects on to the strength of the PCM-ceramsite composites. Finally, an optimal structure of ceramsites was proposed for PCM.
Study on shape-stabilised paraffin-ceramsite composites with stable strength as phase change material (PCM) for energy storage
https://orcid.org/0000-0002-4651-1215
Highlights As an economical and reliable PCM material, paraffin is compatible with ceramsite. Paraffin-impregnated ceramsite has a little leakage issue but paraffin loss value is<3%. The inner structure of ceramsite decides the PCM impregnation and retaining capacity. The pores near the surface of paraffin-impregnated ceramsite particles reduces PCM retention. High porosity of ceramsite is significant but opening distribution is crucial for PCM.
Abstract The massive energy consumption in construction has been a critical challenge for sustainable development. Incorporating phase change material (PCM) into construction materials is an effective way to improve energy management. In this work, the paraffin with a melting point of ∼ 28 °C and latent heat of ∼ 193 J/g was absorbed into fly ash ceramsites (artificial porous aggregate) under vacuum pressure. The ceramsite had sizes ranging from 7 to 13 mm, within the size range of coarse aggregates in concrete. The main properties of the raw ceramsite, paraffin, and paraffin/ceramsite composite were tested using Differential Scanning Calorimetry (DSC), X-Ray Diffraction (XRD), microscope, leakage testing, mechanical testing, etc. The PCM incorporation ratio was 45.33 wt%. This incorporation value is adequate for PCM composite in concrete to show the significant performance of thermal regulation. The leakage test result shows excellent stability of the PCM carrying in the ceramsites. The PCM-ceramsite composites present intact structures under heating and cooling cycles because of the low-volume expansion of paraffin. Solidified PCM inside the ceramsite particles improve the strength of the composites. Microcharacterization indicates that the connected pores/cracks inside the ceramsite particles are the primary path, while unconnected pores have little benefit for PCM incorporation. Small pores have better PCM retaining efficiency, especially if they are located at the sub-deep layer. Large pores provide ample space for PCM but have adverse effects on to the strength of the PCM-ceramsite composites. Finally, an optimal structure of ceramsites was proposed for PCM.
Study on shape-stabilised paraffin-ceramsite composites with stable strength as phase change material (PCM) for energy storage
https://orcid.org/0000-0002-4651-1215
Highlights As an economical and reliable PCM material, paraffin is compatible with ceramsite. Paraffin-impregnated ceramsite has a little leakage issue but paraffin loss value is<3%. The inner structure of ceramsite decides the PCM impregnation and retaining capacity. The pores near the surface of paraffin-impregnated ceramsite particles reduces PCM retention. High porosity of ceramsite is significant but opening distribution is crucial for PCM.
Abstract The massive energy consumption in construction has been a critical challenge for sustainable development. Incorporating phase change material (PCM) into construction materials is an effective way to improve energy management. In this work, the paraffin with a melting point of ∼ 28 °C and latent heat of ∼ 193 J/g was absorbed into fly ash ceramsites (artificial porous aggregate) under vacuum pressure. The ceramsite had sizes ranging from 7 to 13 mm, within the size range of coarse aggregates in concrete. The main properties of the raw ceramsite, paraffin, and paraffin/ceramsite composite were tested using Differential Scanning Calorimetry (DSC), X-Ray Diffraction (XRD), microscope, leakage testing, mechanical testing, etc. The PCM incorporation ratio was 45.33 wt%. This incorporation value is adequate for PCM composite in concrete to show the significant performance of thermal regulation. The leakage test result shows excellent stability of the PCM carrying in the ceramsites. The PCM-ceramsite composites present intact structures under heating and cooling cycles because of the low-volume expansion of paraffin. Solidified PCM inside the ceramsite particles improve the strength of the composites. Microcharacterization indicates that the connected pores/cracks inside the ceramsite particles are the primary path, while unconnected pores have little benefit for PCM incorporation. Small pores have better PCM retaining efficiency, especially if they are located at the sub-deep layer. Large pores provide ample space for PCM but have adverse effects on to the strength of the PCM-ceramsite composites. Finally, an optimal structure of ceramsites was proposed for PCM.
Study on shape-stabilised paraffin-ceramsite composites with stable strength as phase change material (PCM) for energy storage
Wang, Xiaonan (author) / Li, Wengui (author) / Huang, Yuhan (author) / Zhang, Shishun (author) / Wang, Kejin (author)
2023-05-04
Article (Journal)
Electronic Resource
English
Study on the Thermal Properties of Paraffin/Ceramsite Phase Change Concrete
| Tema Archive | 2013
Study on the Thermal Properties of Paraffin/Ceramsite Phase Change Concrete
| British Library Conference Proceedings | 2014