Enhancement of heat transfer in adsorption bed of vacuum-tube with fins

Li, Y.X.; Wang, L.; Yuan, Z.X.; Chen, Q.F.

doi:10.1016/j.applthermaleng.2019.03.005

Cited by 12 publications

(2 citation statements)

References 19 publications

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“…Y.X. Li et al [2] investigated a system performance, in which the use of zeolite water was the adsorption working pair, and the fin height and thickness had been fixed with a number variation of 2-8. According to the experiment's findings, adding more fins improved the system's ability to cool, and the coefficient of refrigeration performance (COP) and specific cooling power (SCP) of the system were also significantly improved.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Effect of Geometric Parameters on the Heat Transfer Performance of Finned-Tube Adsorption Bed

Liu,

Zou,

et al. 2023

Advances in Transdisciplinary Engineering

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Due to the benefits in terms of conserving energy and emission reduction, which are coincident with the current energy development trend, adsorption refrigeration technology has gained popularity. The central part of the adsorption refrigeration system is the adsorption bed, in which heat transfer performance has a direct impact on the system’s efficiency. A numerical model of a finned-tube heat exchanger in a silica-gel water adsorption refrigeration system has been built as a numerical model for this study. A mathematical model along with Darcy’s law has been considered to take into the effects of heat and transfer. On how well heat transfer occurs, the influences of geometric factors including fin height, fin thickness, fin pitch, and porosity of silica gel were obtained. The findings indicate the heat exchanger’s heat transmission is uniform, with a maximum temperature differential of 1.14 K on its fin. The heat exchanger reaches a stable average temperature at the fastest rate with a 10 mm fin height. The optimal fin pitch of the adsorption bed is 2.2 mm. The heat exchanger performs better with a fin that is 0.22 mm thick. Overall, the study supplies an analytical and methodological basis for the influence of geometric factors on heat transmission in adsorption beds and generates new structural optimization ideas.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on the Effect of Geometric Parameters on the Heat Transfer Performance of Finned-Tube Adsorption Bed

Liu,

Zou,

et al. 2023

Advances in Transdisciplinary Engineering

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“…Freni et al [11] report advanced sorbent materials such as new zeolite-like materials (AIPO and SAPO) and composite adsorbents like LiBr-silica and CaCl 2 -silica as very promising for conventional adsorptive heat pumps and chillers. In parallel of the enhancement of the working pairs' performance, studies are carried out on the intensification of the heat and mass transfer [12][13][14]. These recent advances could open new fields of applications for adHP, because of enhanced performances for specific temperature levels.…”

Section: Introductionmentioning

confidence: 99%

Development and Testing of Novel Applications for Adsorption Heat Pumps and Chillers

et al. 2020

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This work aims at the development and the experimental characterization of new applications for adsorption heat pumps and chillers driven by industrial waste heat or renewable sources that can provide heating and/or cooling. Adsorption technologies offer the advantage of providing heating and cooling from low temperature sources below 100 °C without using refrigerant with high Global Warming Potential and with very low electricity consumption. Therefore, the technology enables the use of large untapped heat sources, increasing the energy efficiency of the heating and cooling sector with very limited impact on the environment. Several applications were investigated numerically for Switzerland using a simplified model of an adsorption heat pump. Four scenarios were identified as interesting: (1) the valorization of low-grade industrial waste heat in district heating networks, (2) energy efficiency improvement of district heating substations, (3) an autonomous adsorption heat pump with a wood pellets burner and (4) cooling applications. These scenarios were experimentally validated with a laboratory test of a commercial silica gel/water machine. Results show that there is a gap of up to 40% between the prediction of the simplified model and the experimental results. Therefore, there is huge potential to improve the performances of this commercial unit for these applications.

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Experimental investigation on a two-bed adsorption refrigeration system with mass recovery

Yin

Wang

et al. 2022

Applied Thermal Engineering

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Enhancement of heat transfer in adsorption bed of vacuum-tube with fins

Cited by 12 publications

References 19 publications

Numerical Study on the Effect of Geometric Parameters on the Heat Transfer Performance of Finned-Tube Adsorption Bed

Numerical Study on the Effect of Geometric Parameters on the Heat Transfer Performance of Finned-Tube Adsorption Bed

Development and Testing of Novel Applications for Adsorption Heat Pumps and Chillers

Experimental investigation on a two-bed adsorption refrigeration system with mass recovery

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