Examination of effects of operating and geometric parameters on the performance of a two-bed adsorption chiller

Elsheniti, Mahmoud B.; Hassab, M.A.; Attia, Abdelhamid

doi:10.1016/j.applthermaleng.2018.10.043

Cited by 37 publications

(28 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An important element of activities aimed at increasing energetic efficiency is the maximum use of heat that has so far been released into the atmosphere and its conversion into usable energy. Moreover, the two main expectations defined in the concept of sustainable development are the reduction of energy consumption from non-renewable sources and the effective utilization of low-grade thermal energy originating from industrial waste heat, solar power, cogeneration or exhaust gases from internal combustion engines [2].…”

Section: Environmental Demandsmentioning

confidence: 99%

“…Moreover, on the markets of the Middle and the Far East, adsorption technology is intensively developed because of the possibility of desalination of seawater along with the production of cooling energy [17]. But the widespread application of adsorption chillers is limited by the following shortcomings of adsorption cooling technology: low coefficient of performance [18], large weight and volume [16], intermittent cooling [14], high initial procurement cost [14], and exploitation under vacuum conditions [2].…”

Section: Adsorption Chillersmentioning

confidence: 99%

“…In the second stage of the research, apart from the heat transfer and flow processes, the desorption process was investigated as the analysis of temperatures inside the bed during the desorption is important to show the spatial distributions of the main parameters of the chiller [2]. The boundary conditions corresponded with the final stage of the desorption phase of the adsorption chiller working cycle, therefore, the water of 343 K was the heating fluid and the mass-flow-inlet boundary condition of mass flow rate equal to 0.005 kg/s was assigned.…”

Section: Boundary Conditions and Model Settingsmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Heat Transfer Performance of a Multi-Disc Sorption Bed Dedicated for Adsorption Cooling Technology

Sosnowski

2019

Energies

View full text Add to dashboard Cite

The possibility of implementing the innovative multi-disc sorption bed combined with the heat exchanger into the adsorption cooling technology is investigated experimentally and numerically in the paper. The developed in-house sorption model incorporated into the commercial computational fluid dynamics (CFD) code was applied within the analysis. The research allowed to define the design parameters of the proposed type of the sorption bed and correlate them with basic factors influencing the performance of the sorption bed and its dimensions. The designed multi-disc sorption bed is characterized by great scalability and allows to significantly expand the potential installation sites of the adsorption chillers.

show abstract

Section: Environmental Demandsmentioning

confidence: 99%

Section: Adsorption Chillersmentioning

confidence: 99%

Section: Boundary Conditions and Model Settingsmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Heat Transfer Performance of a Multi-Disc Sorption Bed Dedicated for Adsorption Cooling Technology

Sosnowski

2019

Energies

View full text Add to dashboard Cite

show abstract

“…Regarding the adsorption bed heat and mass transfer, fins' parameters in the packed bed adsorber have been found the most influential parameters on the adsorption system performance. Elsheniti et al [12] developed a detailed numerical model for a two-bed adsorption chiller to examine both operational and geometrical parameters. The study highlighted the importance of adapting the physical bed parameters to match each application, particularly the fin numbers.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Adsorption Ice Maker Productivity using Beds of Aluminium Foam Packed with Activated Carbon

Elsheniti

Al-Ansary

Orfi

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The adsorption refrigeration system driven by solar energy is a promising sustainable solution to tackle the growing demand for cooling and meet environmental regulations as well. In addition, the increase in refrigeration needs is in phase with the increase in the abundant solar energy in the Middle East. This study aims at numerically investigating the utilize of a high adsorption performance material namely Maxsorb III, a type of activated carbon, packed in an advanced aluminium foam bed to produce ice from two-bed adsorption system. A detailed 2-D axisymmetric transient model considering mass, momentum, and energy balance equations coupled with isotherms and kinetic models in the adsorbent domain to describe the adsorption phenomena was developed and used for the simulations. Results of a typical packed bed using finned tube configuration were used as a base model to compare the performance enhancement. The aluminium foam-based system performance outperformed the base model in producing the ice by 16.8% at a high cycle time of 1200 s, regeneration temperature of 90°C, and foam thickness of 5 mm. Furthermore, the coefficient of performance and specific cooling power increased by 26.7% and 27.9%, respectively, driven by the considerable enhancement in the bed mass and heat transfer due to the use of metal foam.

show abstract

“…Therefore, the desorption and adsorption time can be reduced by increasing the velocity of the heat transfer fluid [27]. Elsheniti et al [28], who used COMSOL Multiphysics software for investigations, reported that the COP and specific cooling capacity could be improved by 68% and 42%, respectively, when the flow character of the heat transfer fluid was changed from laminar to turbulent.…”

Section: Introductionmentioning

confidence: 99%

CFD Analysis of Elements of an Adsorption Chiller with Desalination Function

et al. 2021

View full text Add to dashboard Cite

This paper presents the results of numerical tests on the elements of an adsorption chiller that comprises a sorption chamber with a bed, a condenser, and an evaporator. The simulation is based on the data and geometry of a prototype refrigeration appliance. The simulation of this problem is unique and has not yet been performed, and so far, no simulation of the phenomena occurring in the systems on a real scale has been carried out. The presented results are part of the research covering the entire spectrum of designing an adsorption chiller. The full process of numerical modeling of thermal and flow phenomena taking place in the abovementioned components is presented. The computational mesh sensitivity analysis combined in the k-ε turbulence model was performed. To verify and validate the numerical results obtained, they were compared with the results of tests carried out on a laboratory stand at the AGH Center of Energy. The results of numerical calculations are in good agreement with the results of the experimental tests. The maximum deviation between the pressure obtained experimentally and by simulations is 1.8%, while for temperatures this deviation is no more than 0.5%. The results allow the identification of problems and their sources, which allows for future structural modifications to optimize the operation of the device.

show abstract

Examination of effects of operating and geometric parameters on the performance of a two-bed adsorption chiller

Cited by 37 publications

References 38 publications

Evaluation of Heat Transfer Performance of a Multi-Disc Sorption Bed Dedicated for Adsorption Cooling Technology

Evaluation of Heat Transfer Performance of a Multi-Disc Sorption Bed Dedicated for Adsorption Cooling Technology

Enhancing Adsorption Ice Maker Productivity using Beds of Aluminium Foam Packed with Activated Carbon

CFD Analysis of Elements of an Adsorption Chiller with Desalination Function

Contact Info

Product

Resources

About