Preparation of a novel diatomite-based PCM gypsum board for temperature-humidity control of buildings

Yang, Yingying; Zhang, Shen; Wu, Weidong; Zhang, Hua; Ren, Yan; Yang, Qiguo

doi:10.1016/j.buildenv.2022.109732

Cited by 37 publications

(6 citation statements)

References 51 publications

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“…PCMs have been widely integrated into building envelope structures, and a considerable amount of research has discussed the feasibility of such integration [19,20]. PCMs can absorb or release significant latent heat during phase transitions, and their use in building envelopes is widely recognized [21], which has been reported to be integrated into walls [22], bricks [23], floors [20], concrete [24], and mortar [25] to enhance the thermal storage capacity of building envelopes. Yang et al found that PCM gypsum boards demonstrated satisfactory performance in heat storage and temperature delayed heat release compared with normal gypsum boards [22].…”

Section: Applications Of Pcm In Constructionmentioning

confidence: 99%

“…PCMs can absorb or release significant latent heat during phase transitions, and their use in building envelopes is widely recognized [21], which has been reported to be integrated into walls [22], bricks [23], floors [20], concrete [24], and mortar [25] to enhance the thermal storage capacity of building envelopes. Yang et al found that PCM gypsum boards demonstrated satisfactory performance in heat storage and temperature delayed heat release compared with normal gypsum boards [22]. Silva et al reported that PCMs integrated into brick walls had the potential to store solar thermal energy, reducing the thermal amplitude from 10 • C to 5 • C, which helped to attenuate indoor temperature fluctuations [23].…”

Section: Applications Of Pcm In Constructionmentioning

confidence: 99%

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Study on the Influence of the Application of Phase Change Material on Residential Energy Consumption in Cold Regions of China

Wang,

Shao,

Zhao

et al. 2024

Energies

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As the impact of climate change intensifies, meeting the energy demand of buildings in China’s cold regions is becoming increasingly challenging, particularly in terms of cooling energy consumption. The effectiveness of integrating phase change material (PCM) into building envelopes for energy saving in China’s cold regions is unclear. The aim of this study is to assess the effectiveness of PCM integration in building enclosures for energy efficiency in these regions. The research monitored and recorded indoor temperature data from typical residential cases from May to September. This measured data was then used to validate the accuracy of EnergyPlus22-1 software simulation models. Subsequently, the calibrated model was utilized to conduct a comparative analysis on the effects of PCM on indoor temperatures and cooling energy consumption across these regions. The results of these comparative analyses indicated that PCM can alleviate indoor overheating to varying degrees in severe cold regions of China. Focusing on north-facing bedrooms, applying PCMs reduced the duration of overheating in non-air-conditioned buildings in severe cold regions of China by 136 h (Yichun), 340 h (Harbin), 356 h (Shenyang), and 153 h (Dalian). In terms of cooling energy consumption, the energy saved by applying PCMs ranged from 1.48 to 13.83 kWh/m2. These results emphasize that the performance of PCM varies with climate change, with the most significant energy-saving effects observed in severe cold regions. In north-facing bedrooms in Harbin, the energy-saving rate was as high as 60.30%. Based on these results, the study offers guidance and recommendations for feasible passive energy-saving strategies for buildings in severe cold and cold regions of China in the face of climate change. Additionally, it provides practical guidance for applying PCMs in different climatic zones in China.

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Section: Applications Of Pcm In Constructionmentioning

confidence: 99%

Section: Applications Of Pcm In Constructionmentioning

confidence: 99%

Study on the Influence of the Application of Phase Change Material on Residential Energy Consumption in Cold Regions of China

Wang,

Shao,

Zhao

et al. 2024

Energies

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“…Pore volume: 2.8 cm 3 /g [146] Specific surface area: 18 m 2 /g [146] Thermal conductivity: 0.065 W/(m•K) [147] Average pore diameter: 600 nm [147] Bulk density: 127.74 kg/m 3 [60] Adsorption capacity: 0.03 g•g −1 [60] Cost-effective [148] Excellent hydrophilic [117] Weak hydrothermal stability [60] Expanded perlite Pore volume: 3.7 cm 3 /g [116] Specific surface area: 20.29 m 2 /g [116] Average pore diameter: 720 nm [116] Adsorption capacity: 0.17 g•g −1 [116] Attapulgite Specific surface area: 98 m 2 /g [148] Average pore diameter: 64 nm [148] Diatomite Pore volume: 0.0438 cm 3 /g [117] Specific surface area: 22 m 2 /g [117] Average pore diameter: 6.7042 nm [117] Bulk density: 1900-2400 kg/m 3 [149] Speiolite Pore volume: 0.19 cm 3 /g [118] Specific surface area: 58.68 m 2 /g [118] Average pore diameter: 17.68 nm [118] Hydroxyapatite Pore volume: 0.664 cm 3 /g [150] Specific surface area: 113.2 m 2 /g [150] Thermal conductivity: 0.15-0.2 W/(m•K) [119] Adsorption capacity: 0.039 g•g −1 [119] Superior compatibility [150] Higher thermal conductivity [119] Mesoporous Silicates (silica gel, silica aerogels, Wakkanai siliceous shale, MCM-41, SBA-15, etc. )…”

Section: Expanded Vermiculitementioning

confidence: 99%

Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

et al. 2023

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Recent years have seen increasing attention to TCES technology owing to its potentially high energy density and suitability for long-duration storage with negligible loss, and it benefits the deployment of future net-zero energy systems. This paper provides a review of salt hydrate adsorption material-based TCES for space heating applications at ~150 °C. The incorporation of salt hydrates into a porous matrix to form composite materials provides the best avenue to overcome some challenges such as mass transport limitation and lower thermal conductivity. Therefore, a systematic classification of the host matrix is given, and the most promising host matrix, MIL-101(Cr)(MOFs), which is especially suitable for loading hygroscopic salt, is screened from the perspective of hydrothermal stability, mechanical strength, and water uptake. Higher salt content clogs pores and, conversely, reduces adsorption performance; thus, a balance between salt content and adsorption/desorption performance should be sought. MgCl2/rGOA is obtained with the highest salt loading of 97.3 wt.%, and the optimal adsorption capacity and energy density of 1.6 g·g−1 and 2225.71 kJ·kg−1, respectively. In general, larger pores approximately 8–10 nm inside the matrix are more favorable for salt dispersion. However, for some salts (MgSO4-based composites), a host matrix with smaller pores (2–3 nm) is beneficial for faster reaction kinetics. Water molecule migration behavior, and the phase transition path on the surface or interior of the composite particles, should be identified in the future. Moreover, it is essential to construct a micromechanical experimental model of the interface.

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“…Developing energy storage systems or technologies can provide long-term support for future low-carbon energy systems while reducing energy supply risk. At present, the main energy storage technology is pumped hydro energy storage (Rehman et al, 2015;Javed et al, 2020), and the research and application of phase change energy storage (Yang et al, 2020;Huo et al, 2022;Yang et al, 2022;Liu et al, 2023a), battery energy storage (Heyhat et al, 2020;Naghavi Sanjani et al, 2023) and other energy storage technologies are developing (Koohi-Fayegh and Rosen, 2020;Liu et al, 2023c). However, the energy storage technologies mentioned above are still unable to meet the demands for big capacity and long-term energy storage.…”

Section: Introductionmentioning

confidence: 99%

Pore-scale simulation of miscible displacement in an inclined porous medium

Liu,

Xu,

Wang

et al. 2024

Front. Energy Res.

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Introduction: This study investigates the displacement of two miscible fluids within an inclined porous medium at the pore scale, highlighting how the pore-scale microstructure, inclination angle, and viscosity ratio affect the interfacial instability between two fluids during displacement processes.Methods: The lattice Boltzmann Method (LBM) is employed to solve the governing equations. Two distribution functions are used to simulate the velocity field and the concentration field, respectively.Results and discussion: An increase in inclination angle exacerbates the interfacial instability between fluids and the viscous fingering phenomenon. This viscous fingering expands the sweep range of displacing fluids, which improves the displacement efficiency. When θ > 50°, further increase in inclination angle will not cause significant changes in displacement efficiency. In addition, the viscosity ratio is a key factor affecting displacement efficiency. The larger the viscosity ratio, the greater the displacement efficiency. Furthermore, the critical viscosity ratio has been found, and any increase in the viscosity ratio above the critical value will not affect the displacement efficiency.

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Preparation of a novel diatomite-based PCM gypsum board for temperature-humidity control of buildings

Cited by 37 publications

References 51 publications

Study on the Influence of the Application of Phase Change Material on Residential Energy Consumption in Cold Regions of China

Study on the Influence of the Application of Phase Change Material on Residential Energy Consumption in Cold Regions of China

Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

Pore-scale simulation of miscible displacement in an inclined porous medium

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