Performance evaluation of a novel plate-type porous indirect evaporative cooling system: An experimental study

Shi, Wenchao; Min, Yunran; Ma, Xiaochen; Chen, Yi; Yang, Hongxing

doi:10.1016/j.jobe.2021.103898

Cited by 21 publications

(7 citation statements)

References 27 publications

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“…Several researches focused on the study of porous materials for the wet duct of the heat exchanger, such as: cellulose fiber coating for metal foils, cotton wool, honeycomb structures, coconut fiber, polymer sheets, stainless steel with sintered nickel layer, etc [3,4].…”

Section: Introductionmentioning

confidence: 99%

Biochar powders coating to improve evaporative cooling in Maisotsenko-cycle systems

Morselli,

Fracasso,

Cossu

et al. 2024

J. Phys.: Conf. Ser.

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This work presents an experimental study on the performance of biochar powder coatings on aluminum surfaces for use in indirect evaporative coolers based on the Maisotsenko cycle. The performance of the biochar coated samples was compared to cellulose-coated aluminum samples and uncoated ones. Results showed that biochar coatings improved the performance of uncoated aluminum, with the 150 μm particle size coating offering performance comparable to cellulose. However, wetting times were longer, which has implications for spraying strategies.

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Section: Introductionmentioning

confidence: 99%

Biochar powders coating to improve evaporative cooling in Maisotsenko-cycle systems

Morselli,

Fracasso,

Cossu

et al. 2024

J. Phys.: Conf. Ser.

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“…Ling et al [17] studied the damage of iron ore tailings concrete under various conditions using uniaxial compression tests and discrete element modeling and found that the maximum stress during cyclic loading significantly influenced the number of fractures and that increasing the iron ore tailings aggregate content enhanced the concrete's compressive stress, while reducing the particle size of these tailings helped prevent fracture formation. Furthermore, iron ore tailings have found applications in various building materials, including cement mortar [2], autoclaved aerated concrete [18], and ceramic tiles [19], showcasing their potential to reduce solid waste accumulation and natural aggregate extraction for material conservation and carbon reduction goals. Nonetheless, higher substitution ratios of iron ore tailings aggregates in concrete production may compromise other properties of the resultant concrete [20,21].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Sulfate Freeze–Thaw Resistance of Calcium Carbonate Whisker-Reinforced Iron Ore Tailings Concrete

Wang,

Gao,

Liu

2024

Buildings

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Iron ore tailings from iron ore mines pose environmental challenges. However, their reuse could provide significant environmental benefits. This study focused on producing clean concrete using iron ore tailings as crushed stone aggregate (IOTA) and calcium carbonate whiskers (CWs) as reinforcement. Five mixture groups were prepared: normal concrete (NAC) with natural crushed stone aggregate (NA), iron ore tailings concrete (TAC) with IOTA, and CW (10%, 20%, and 30%)-reinforced TAC (TAC-CW). Mechanical properties like the compressive strength (fcu) and splitting tensile strength (fst), as well as sulfate freeze–thaw (F-T) cycle resistance, were thoroughly investigated. Additionally, pore structure and microstructure were characterized using nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM) techniques. The results showed that IOTA’s complete replacement of NA decreased concrete mechanical properties and frost resistance, but incorporating CWs effectively compensated for these losses. Specifically, the fcu and fst of TAC-CW20 with 20% CWs increased by 23.26% and 49.6% compared to TAC and were higher than those of NAC. With increasing F-T cycles, concrete internal pore structure significantly deteriorated, and corrosive products increased significantly, which was further confirmed by SEM. TAC-CW20 significantly optimized pore structure. Overall, the successful application of iron ore tailings as eco-friendly materials enhanced concrete performance and reduced the environmental impact of construction activities.

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“…The building sector is a significant contributor to worldwide energy consumption and carbon emissions [1][2][3]. According to [4], it is responsible for 30% of final global energy usage and 28% of carbon emissions related to energy.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of High-Rise Buildings Integrated with Colored Radiative Cooling Walls in a Hot and Humid Region

Chen,

Lu,

Jia

et al. 2023

Sustainability

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Radiative sky cooling is an appealing form of heat exchange between terrestrial objects and outer space through thermal radiation, which is attracting worldwide interest due to its nature as passive cooling, that is, cooling without consuming energy. Due to a recent breakthrough in material science, sub-ambient daytime radiative sky cooling has been effectively achieved, which has significantly stimulated research interest in this field. In view of the numerous radiative coolers being reported as having excellent spectral properties and cooling ability under sunlight, integrating these superb cooling materials into building skins is a promising route to implementing radiative sky cooling technology. To this end, this study deploys state-of-the-art colored radiative cooling coatings as a new retrofitting strategy for building walls, and then conducts a comprehensive performance evaluation by considering a high-rise building situated in the hot-humid city of Hong Kong. Potential benefits of implementing differently colored cooling wall strategies, including their performance regarding thermal insulation, energy savings, economic viability, and environmental sustainability, were thoroughly investigated. The obtained results elucidate that for the utilization of the porous P(VdF-HFP)-based bilayer wall, relative to the monolayer, the frequency of the wall temperature exceeding the surrounding environment on an annual basis can be further reduced by up to 4.8%, and the yearly savings in cooling electricity vary from 855.6 to 3105.6 kWh (0.4–1.5%) with an average of 1692.4 kWh. Besides this, the yearly savings in net electricity cost vary from 1412.5 to 5127.3 HKD and the reduction in carbon emissions ranges from 1544.4 to 5606.1 kg with an average of 3055.0 kg. In addition, discussions of the combination of the super-cool roof strategy with blue porous polymer-based cooling walls reveal that the achievable savings in terms of energy costs and reductions in carbon emissions are 1.6 and 2.2 times more than either the application of the super-cool roof or porous polymer bilayer walls alone, respectively. This research offers new understandings of the deployment of colored cooling coatings on vertical building façades in hot and humid regions, which can considerably facilitate the realization of low-energy buildings in a passive approach for stakeholders.

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Performance evaluation of a novel plate-type porous indirect evaporative cooling system: An experimental study

Cited by 21 publications

References 27 publications

Biochar powders coating to improve evaporative cooling in Maisotsenko-cycle systems

Biochar powders coating to improve evaporative cooling in Maisotsenko-cycle systems

Mechanical Properties and Sulfate Freeze–Thaw Resistance of Calcium Carbonate Whisker-Reinforced Iron Ore Tailings Concrete

Performance Evaluation of High-Rise Buildings Integrated with Colored Radiative Cooling Walls in a Hot and Humid Region

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