Journal ArticleDOI
Effect of Residual Gas on Water Adsorption Dynamics Under Typical Conditions of an Adsorption Chiller
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TLDR
In this article, the effect of a non-adsorbable gas (air) on the kinetics of water adsorption on loose grains was studied for three adsorbents promising for adaption chilling: SWS-1L (silica KSK modified by calcium chloride), silica Fuji type RD and FAM-Z02.Abstract:
In this article the effect of a non-adsorbable gas (air) on kinetics of water adsorption on loose grains was studied for three adsorbents promising for adsorption chilling: SWS-1L (silica KSK modified by calcium chloride), silica Fuji type RD, and FAM-Z02. The experimental conditions were fixed similar to real operating conditions during an isobaric adsorption stage of the basic cycle of an adsorption chiller (AC). Reduction of the adsorption rate was revealed even at a partial pressure of residual air as low as 0.06 mbar. Dependence of the characteristic adsorption time on air partial pressure was found to be linear for partial pressures greater than 0.4 mbar, with the slope depending on the adsorbent nature. Desorption stage was less affected by the residual air. Specific power released in an AC evaporator during the adsorption process was estimated as a function of the partial pressure of residual air, and recommendations how to improve cooling performance are made.read more
Citations
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Adsorption-Driven Heat Pumps: The Potential of Metal-Organic Frameworks
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Optimization of adsorption dynamics in adsorptive chillers: Loose grains configuration
TL;DR: In this paper, the performance of a simple ad-bed configuration of n -layers of loose grains (n ǫ = 1, 2, 4, and 8) located on a heat transfer metal support is studied.
Journal ArticleDOI
Comparative analysis of promising adsorbent/adsorbate pairs for adsorptive heat pumping, air conditioning and refrigeration
TL;DR: In this article, a model was developed to evaluate the performance for different sorption cycles and results of simulation showed the importance of selecting the optimal adsorbent for a given application.
Journal ArticleDOI
The effect of cycle boundary conditions and adsorbent grain size on the water sorption dynamics in adsorption chillers
I.S. Glaznev,Yu. I. Aristov +1 more
TL;DR: In this paper, the authors performed an experimental study of the temporal evolution of isobaric adsorption uptake (release) for the simplest configuration of an adsorbent-heat exchanger unit, namely, a monolayer of loose adorbent grains located on a metal plate.
Journal ArticleDOI
Dynamic study of adsorbers by a new gravimetric version of the Large Temperature Jump method
TL;DR: In this article, a new experimental setup devoted to measuring the ad/desorption kinetics of an Ad-HEX (adsorbent + heat exchanger) under typical boundary conditions of an AHT was presented.
References
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Journal ArticleDOI
A family of new working materials for solid sorption air conditioning systems
TL;DR: In this paper, a family of new working materials, called selective water sorbents, is presented for sorption air conditioning, which are composites "hygroscopic salt inside porous matrix with open pores" and possess intermediate behavior between solid adsorbents, salt hydrates and liquid absorbents, so that their water sorption properties can be controllably modified by varying porous structure of the host matrix, chemical nature of the impregnated salt and the amount of the salt inside the pores.
Journal ArticleDOI
Experimental investigation of the silica gel–water adsorption isotherm characteristics
Kim Choon Ng,Hui Tong Chua,C. Y. Chung,C. H. Loke,Takao Kashiwagi,Atsushi Akisawa,Bidyut Baran Saha +6 more
TL;DR: In this paper, an experimental approach for the determination of thermodynamic characteristics of silica gel-water working pair is described, which is essential for the sizing of adsorption chillers.
Journal ArticleDOI
Adsorption Characteristics of Silica Gel + Water Systems
TL;DR: In this paper, the adsorption characteristics of pure water vapor onto two different types of silica gel at temperatures from (298 to 338) K and at different equilibrium pressures between (500 and 7000) Pa were experimentally studied by a volumetric technique.
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Selective water sorbents for multiple applications, 5. LiBr confined in mesopores of silica gel: Sorption properties
TL;DR: In this article, a selective water sorbent based on mesoporous KSKG silica gel as a host matrix and lithium bromide as a hygroscopic salt is presented.