Study of heat and mass transfer in a dehumidifying desiccant bed with macro-encapsulated phase change materials

Rady, Mohamed; Huzayyin, A.S.; Arquis, Éric; Monneyron, Pierre; Lebot, C.; Palomo, Elena

doi:10.1016/j.renene.2008.04.038

Cited by 43 publications

(26 citation statements)

References 8 publications

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“…The motivations of the present interest in these materials are related to expected advantages in terms of heat transfer rates, flexibility, and multiplicity of applications in energy systems offered by using such GPCCs of small particle diameter (see Section 7 for a general overview). Potentials of their application have been recently investigated in desiccant cooling systems [6] and in air conditioning systems of buildings [7].…”

Section: Introductionmentioning

confidence: 99%

Granular phase change materials for thermal energy storage: Experiments and numerical simulations

Rady

2009

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

Granular phase change materials for thermal energy storage: Experiments and numerical simulations

Rady

2009

Applied Thermal Engineering

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“…A wide range of encapsulated phase change materials (EPCM) in the form of particles of small diameters in the order of few millimeters are available [6,7]. The authors have studied the possibility of integration of these materials for enhancing the performance of desiccant cooling systems [8]. Good potential for these materials for application in air conditioning systems of buildings has also been demonstrated by Nagano et al [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…The composition of the granule is 65% ceramics and 35% paraffin wax by weight. The interest in these materials is motivated from their recent applications in energy systems [8][9][10]. These materials provide a number of features, namely the amount of energy stored in a small mass with respect to volume, higher heat transfer rates as due to small particle diameter, and flexibility of application.…”

Section: Introductionmentioning

confidence: 99%

Characterization of granular phase changing composites for thermal energy storage using the T-history method

Rady

Arquis

Bot

2009

Int. J. Energy Res.

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SUMMARYThe present article reports on the characterization of granular phase changing composites using the T-history method. Further modifications and improvements of the method are employed to handle granular materials undergoing phase change over a temperature range. The accuracy of the T-history method is shown to be limited by the assumption of temperature-independent specific heats and the difficulty of determining the limits of solid and liquid phases. The concept of enthalpy and its relationship with temperature has been employed in the analysis to overcome these difficulties. Enthalpy-temperature and apparent heat capacity curves similar to those obtained using DSC have been developed. These characteristic curves are necessary for accurate design, modeling, and optimization of latent heat thermal energy storage systems. Experiments have been also carried out to measure the transient temperature distribution inside a cylindrical packed bed using phase changing granulates. Analysis of temperature variation along the bed shows good agreement with the measured phase change characteristics.

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“…Path of regeneration air: the regeneration air (return air) is cooled and humidified from state (7) to state (8), the regeneration air is sensible heating in second heat exchanger from state (8) to state (9), the regeneration air is sensible heating in the thermal storage tank from sate (9) to state (10), the regeneration air is sensible heating in solar air collector from sate (10) to state (11), the regeneration air is sensible heating in auxillary heater to the required temperature from sate (11) to state (12), at state (12) the regeneration air is divided into two path for two regeneration section, two path of regeneration air out from desiccant rotor at state (13) and (14) is mixied at state (15), the regeneration air out from desiccant rotor is reheated from state (15) to state (16) in solar coolllector, at state (16) the regeneration air supplied to the thermal storage tank to raise the temperature of thermal storage materials after that the regeneration air out to the surrounding.…”

Section: System Descriptionmentioning

confidence: 99%

Energy saving potential of a solar assisted desiccant air conditioning system for different types of storage

Kabeel

Abdelgaied

Ali

2017

Env Prog and Sustain Energy

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In this study, the performances of a solar energy assisted desiccant air conditioning system with different types of storage materials are numerically investigated. In this study four types of storage materials (paraffin wax, stearic acid, capric‐palmitic, and CaCl2·6H2O) are used to obtained the better storage materials can be use for a solar energy assisted desiccant air conditioning system. The numerical results show that, at the same operating conditions the average percentage of energy saving potential approximately reached to 75.86%, 78%, 72.4%, and 64.6% for using paraffin wax, stearic acid, capric‐palmitic and CaCl2·6H2O as a thermal storage materials, respectively as compared to the case without storage materials and solar energy. The life cycle savings reached to 1727.5, 1997.6, 1766.1, and 1534.6 $for using paraffin wax, stearic acid, capric‐palmitic and CaCl2·6H2O as a storage materials, respectively at the same energy cost of 0.039 $/kWh. The results shows that the stearic acid represents a better thermal storage materials use in a solar assisted desiccant air conditioning with thermal storage materials. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1448–1454, 2018

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Study of heat and mass transfer in a dehumidifying desiccant bed with macro-encapsulated phase change materials

Cited by 43 publications

References 8 publications

Granular phase change materials for thermal energy storage: Experiments and numerical simulations

Granular phase change materials for thermal energy storage: Experiments and numerical simulations

Characterization of granular phase changing composites for thermal energy storage using the T-history method

Energy saving potential of a solar assisted desiccant air conditioning system for different types of storage

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