Evaluation of Performance of Thermal and Electrical Hybrid Adsorption Chiller Cycles with Mechanical Booster Pumps

Zeng, Tao; Esaki, Taito; Jun, Li; Kobayashi, Noriyuki; Huang, Hongyu

doi:10.4236/msce.2017.55003

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Hong et al (2018) experimentally and numerically investigated the thermal performance of a mechanical vapor compression system driven by MBP from the point of industrial operation. In prior work by the authors, the experimental feasibility of an MBP-assisted adsorption chiller cycle has been investigated and demonstrated (Zeng et al, 2017). To the best of our knowledge, there have been limited efforts in developing THT systems assisted by compressors and utilizing water as the working fluid.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of mechanical booster pump-assisted sorption thermochemical heat transformer driven by low-grade heat for building applications

Zeng,

Kobayashi,

et al. 2023

Front. Energy Res.

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Thermochemical heat transformers (THT) can offer the potential for efficient energy storage and upgrade based on a reversible solid-gas reaction. A mechanical booster pump (MBP)-assisted water-based sorption thermochemical heat transformer driven by low-grade solar thermal energy is proposed to handle variations in the heat demand of buildings. The MBP operates during the discharging process to adjust the magnitudes of temperature lift by compression ratio depending on the user’s demands. The performances of the proposed cycle employing three different reactive salts are investigated and compared with the conventional THT cycle under various operating conditions. Results indicate that compared to the conventional THT cycle, the proposed cycle achieves a maximum temperature lift of 15–17°C, 17–19°C, and 23–26°C for SrBr2, LiOH, and CaCl2 in the evaporating temperature range of 20–40°C, respectively. In the same operating conditions, SrBr2 demonstrates the highest energy and exergy efficiencies, while CaCl2 is inferior to the others due to its greater sensible heat consumption and lower reaction heat under the studied conditions. A suggestion is put forth for enhancing the temperature lift by employing a two-stage MBP-assisted cycle that utilizes the reactive salt SrBr2. Compared to the single-stage MBP-assisted cycle, the heat output temperature can be further increased by up to 3–16°C at the expense of a maximum decrease of 6.6%, 84.4%, and 9.0% in coefficient of performance (COP) based on total energy input, COP based on electricity input, and exergy efficiency, respectively, at 30°C evaporating temperature. The economic and environmental analysis indicates that the proposed system is economically and environmentally feasible and could be a promising alternative to residential water heaters.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of mechanical booster pump-assisted sorption thermochemical heat transformer driven by low-grade heat for building applications

Zeng,

Kobayashi,

et al. 2023

Front. Energy Res.

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“…Hence, preparing high-performance biocomposites from shrubs could significantly improve the utilization value of forest resources. 10 Buxus sinica represents an economic shrub commonly found in the forest and is used in traditional Chinese medicine to treat certain diseases. Due to its low requirement on soil texture, high water and drought resistance, and low sensitivity toward temperature changes, it is widely distributed in most wild areas in China.…”

Section: Introductionmentioning

confidence: 99%

“…Biocomposites from wood and other biomass have been widely used as alternative furniture and architectural decoration materials due to their low cost, availability, and biodegradability. − Currently, research interest has been diverted to using trees and agricultural and forestry residues as precursor material to produce biocomposites. − However, the potential of shrubs with small diameters as raw materials is often overlooked. Hence, preparing high-performance biocomposites from shrubs could significantly improve the utilization value of forest resources Buxus sinica represents an economic shrub commonly found in the forest and is used in traditional Chinese medicine to treat certain diseases.…”

Section: Introductionmentioning

confidence: 99%

Innovative Conversion of PretreatedBuxus sinicainto High-Performance Biocomposites for Potential Use as Furniture Material

Ren

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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Traditional wood-based panels are usually made from large-diameter trees and rely on adhesives for compactness, which negatively impacts the environment and human health. However, the widely distributed small-diameter shrubs are good raw materials for wood-based panels with abundant fibers, but are often under-exploited. This research reports the preparation of self-bonding biocomposites from Buxus sinica by an innovative combined approach of extraction, alkali treatment, and hot molding. The resulted biocomposites show better mechanical properties in which the flexural modulus (7.79 GPa) and the tensile modulus (4.33 GPa) were 5 times and 1.7 times higher than the conventional fiberboard, respectively, and also demonstrated better hydrophobicity than fiberboard, which could be due to the layer of lignin that formed on its surface preventing the infiltration of water. To sum up, the biocomposites prepared from small-diameter shrubs meet the requirement of the furniture and architectural decoration materials, suggesting that the proposed approach can be used to produce high-performance biocomposites.

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Glueless formaldehyde-free biocomposites with high strength based on the three-dimensional structure of wood fibres

Yang,

Zhang,

Ren

et al. 2024

Chemical Engineering Journal

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Evaluation of Performance of Thermal and Electrical Hybrid Adsorption Chiller Cycles with Mechanical Booster Pumps

Cited by 3 publications

References 5 publications

Thermodynamic analysis of mechanical booster pump-assisted sorption thermochemical heat transformer driven by low-grade heat for building applications

Thermodynamic analysis of mechanical booster pump-assisted sorption thermochemical heat transformer driven by low-grade heat for building applications

Innovative Conversion of PretreatedBuxus sinicainto High-Performance Biocomposites for Potential Use as Furniture Material

Glueless formaldehyde-free biocomposites with high strength based on the three-dimensional structure of wood fibres

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