Scalable cooling cementitious Composites: Synergy between Reflective, Radiative, and Evaporative cooling

Daoru Liu; Anna Kaja; J.C.O. Zepper; Daiwei Fan; Dongyu Zhang; H.J.H. Brouwers; Qingliang Yu

doi:10.1016/j.enbuild.2023.112909

Scalable cooling cementitious Composites: Synergy between Reflective, Radiative, and Evaporative cooling

Daoru Liu, Anna Kaja, J.C.O. Zepper, Daiwei Fan, Dongyu Zhang, H.J.H. Brouwers, Qingliang Yu (Corresponding author)

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

Promoting the sustainability of the building industry is one of the major approaches to addressing energy depletion and climate change. Here, we developed scalable cementitious cooling composites (CCCs) with superior energy-free cooling performance and environmental applicability. Optical properties, phase composition, microstructure, and silica reactivity of composites are characterized and analyzed. Onsite measurements are conducted to evaluate the surface/internal cooling capacities and validate the cooling principles and such composites’ climatic applicability. Results show that calcite, C[sbnd]S[sbnd]H phases (especially tobermorite), and a higher water-to-powder ratio can increase the solar reflectivity (R_sun). Meanwhile, C[sbnd]S[sbnd]H and calcite can also increase the spectral emissivity in the atmospheric window (ε_aw). Optimal sizes of 0.5 μm (particles) and 1.0 μm (pore size) for Mie scattering are determined by Finite-Difference Time-Domain simulations. The R_sun of 0.90 and ε_aw of 0.88 are simultaneously achieved, which are comparable to exquisitely designed polymer-based coatings, metamaterials, and multi-layer composites. The surface cooling of 17.3 ℃, internal cooling of 9.2 ℃ by solar reflection, internal cooling of 4.8 ℃ by evaporative cooling, and internal cooling above 2.8 ℃ by mid-infrared (MIR) emission are observed. CCCs are proven to provide efficient cooling in different conditions, with low investment, facile production, and high environmental resistance.

Original language	English
Article number	112909
Number of pages	14
Journal	Energy and Buildings
Volume	285
DOIs	https://doi.org/10.1016/j.enbuild.2023.112909
Publication status	Published - 15 Apr 2023

Bibliographical note

Funding Information:
This research is supported by the National Natural Science Foundation of China (Grant No. 52178246), China Scholarship Council (No. 202006950045), Eindhoven University of Technology, and Wuhan University. Sincere thanks are given to Mr. Wout van Bommel for his help in the establishment of the outdoor measurement platform, Aalborg White for providing white cement, and Chemours for providing TiO2 samples.

Keywords

Atmospheric window
Calcium silicate hydrates
Cementitious cooling composites
Moisture
Radiative cooling
Solar spectral reflectivity

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.enbuild.2023.112909

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Cite this

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title = "Scalable cooling cementitious Composites: Synergy between Reflective, Radiative, and Evaporative cooling",

abstract = "Promoting the sustainability of the building industry is one of the major approaches to addressing energy depletion and climate change. Here, we developed scalable cementitious cooling composites (CCCs) with superior energy-free cooling performance and environmental applicability. Optical properties, phase composition, microstructure, and silica reactivity of composites are characterized and analyzed. Onsite measurements are conducted to evaluate the surface/internal cooling capacities and validate the cooling principles and such composites{\textquoteright} climatic applicability. Results show that calcite, C[sbnd]S[sbnd]H phases (especially tobermorite), and a higher water-to-powder ratio can increase the solar reflectivity (Rsun). Meanwhile, C[sbnd]S[sbnd]H and calcite can also increase the spectral emissivity in the atmospheric window (εaw). Optimal sizes of 0.5 μm (particles) and 1.0 μm (pore size) for Mie scattering are determined by Finite-Difference Time-Domain simulations. The Rsun of 0.90 and εaw of 0.88 are simultaneously achieved, which are comparable to exquisitely designed polymer-based coatings, metamaterials, and multi-layer composites. The surface cooling of 17.3 ℃, internal cooling of 9.2 ℃ by solar reflection, internal cooling of 4.8 ℃ by evaporative cooling, and internal cooling above 2.8 ℃ by mid-infrared (MIR) emission are observed. CCCs are proven to provide efficient cooling in different conditions, with low investment, facile production, and high environmental resistance.",

keywords = "Atmospheric window, Calcium silicate hydrates, Cementitious cooling composites, Moisture, Radiative cooling, Solar spectral reflectivity",

author = "Daoru Liu and Anna Kaja and J.C.O. Zepper and Daiwei Fan and Dongyu Zhang and H.J.H. Brouwers and Qingliang Yu",

note = "Funding Information: This research is supported by the National Natural Science Foundation of China (Grant No. 52178246), China Scholarship Council (No. 202006950045), Eindhoven University of Technology, and Wuhan University. Sincere thanks are given to Mr. Wout van Bommel for his help in the establishment of the outdoor measurement platform, Aalborg White for providing white cement, and Chemours for providing TiO2 samples. ",

year = "2023",

month = apr,

day = "15",

doi = "10.1016/j.enbuild.2023.112909",

language = "English",

volume = "285",

journal = "Energy and Buildings",

issn = "0378-7788",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Scalable cooling cementitious Composites

T2 - Synergy between Reflective, Radiative, and Evaporative cooling

AU - Liu, Daoru

AU - Kaja, Anna

AU - Zepper, J.C.O.

AU - Fan, Daiwei

AU - Zhang, Dongyu

AU - Brouwers, H.J.H.

AU - Yu, Qingliang

N1 - Funding Information: This research is supported by the National Natural Science Foundation of China (Grant No. 52178246), China Scholarship Council (No. 202006950045), Eindhoven University of Technology, and Wuhan University. Sincere thanks are given to Mr. Wout van Bommel for his help in the establishment of the outdoor measurement platform, Aalborg White for providing white cement, and Chemours for providing TiO2 samples.

PY - 2023/4/15

Y1 - 2023/4/15

N2 - Promoting the sustainability of the building industry is one of the major approaches to addressing energy depletion and climate change. Here, we developed scalable cementitious cooling composites (CCCs) with superior energy-free cooling performance and environmental applicability. Optical properties, phase composition, microstructure, and silica reactivity of composites are characterized and analyzed. Onsite measurements are conducted to evaluate the surface/internal cooling capacities and validate the cooling principles and such composites’ climatic applicability. Results show that calcite, C[sbnd]S[sbnd]H phases (especially tobermorite), and a higher water-to-powder ratio can increase the solar reflectivity (Rsun). Meanwhile, C[sbnd]S[sbnd]H and calcite can also increase the spectral emissivity in the atmospheric window (εaw). Optimal sizes of 0.5 μm (particles) and 1.0 μm (pore size) for Mie scattering are determined by Finite-Difference Time-Domain simulations. The Rsun of 0.90 and εaw of 0.88 are simultaneously achieved, which are comparable to exquisitely designed polymer-based coatings, metamaterials, and multi-layer composites. The surface cooling of 17.3 ℃, internal cooling of 9.2 ℃ by solar reflection, internal cooling of 4.8 ℃ by evaporative cooling, and internal cooling above 2.8 ℃ by mid-infrared (MIR) emission are observed. CCCs are proven to provide efficient cooling in different conditions, with low investment, facile production, and high environmental resistance.

AB - Promoting the sustainability of the building industry is one of the major approaches to addressing energy depletion and climate change. Here, we developed scalable cementitious cooling composites (CCCs) with superior energy-free cooling performance and environmental applicability. Optical properties, phase composition, microstructure, and silica reactivity of composites are characterized and analyzed. Onsite measurements are conducted to evaluate the surface/internal cooling capacities and validate the cooling principles and such composites’ climatic applicability. Results show that calcite, C[sbnd]S[sbnd]H phases (especially tobermorite), and a higher water-to-powder ratio can increase the solar reflectivity (Rsun). Meanwhile, C[sbnd]S[sbnd]H and calcite can also increase the spectral emissivity in the atmospheric window (εaw). Optimal sizes of 0.5 μm (particles) and 1.0 μm (pore size) for Mie scattering are determined by Finite-Difference Time-Domain simulations. The Rsun of 0.90 and εaw of 0.88 are simultaneously achieved, which are comparable to exquisitely designed polymer-based coatings, metamaterials, and multi-layer composites. The surface cooling of 17.3 ℃, internal cooling of 9.2 ℃ by solar reflection, internal cooling of 4.8 ℃ by evaporative cooling, and internal cooling above 2.8 ℃ by mid-infrared (MIR) emission are observed. CCCs are proven to provide efficient cooling in different conditions, with low investment, facile production, and high environmental resistance.

KW - Atmospheric window

KW - Calcium silicate hydrates

KW - Cementitious cooling composites

KW - Moisture

KW - Radiative cooling

KW - Solar spectral reflectivity

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U2 - 10.1016/j.enbuild.2023.112909

DO - 10.1016/j.enbuild.2023.112909

M3 - Article

AN - SCOPUS:85149057927

SN - 0378-7788

VL - 285

JO - Energy and Buildings

JF - Energy and Buildings

M1 - 112909

ER -

Scalable cooling cementitious Composites: Synergy between Reflective, Radiative, and Evaporative cooling

Abstract

Bibliographical note

Keywords

UN SDGs

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Reports from Wuhan University Add New Data to Findings in Energy and Buildings (Scalable Cooling Cementitious Composites: Synergy Between Reflective, Radiative, and Evaporative Cooling)

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Scalable cooling cementitious Composites: Synergy between Reflective, Radiative, and Evaporative cooling

Abstract

Bibliographical note

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

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Reports from Wuhan University Add New Data to Findings in Energy and Buildings (Scalable Cooling Cementitious Composites: Synergy Between Reflective, Radiative, and Evaporative Cooling)

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