International journal of refrigeration, Vol. 35 N° 3. International journal of refrigeration - Mai 2012
| Titre : | International journal of refrigeration, Vol. 35 N° 3. International journal of refrigeration - Mai 2012 |
| Type de document : | Bulletin |
| Paru le : | 19/09/2012 |
Dépouillements
Article : texte imprimé
Article : texte imprimé
Ahmed A. Askalany, Auteur ;
Salem, M., Auteur ;
I.M. Ismail, Auteur
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Experimental runs were done to estimate the adsorption characteristics of granular activated carbon (GAC)/R134a pair. A laboratory scale test rig was designed and built to run the experiments. The adsorption capacity of the GAC was studied at di[...]
Article : texte imprimé
Bidyut Baran Saha, Auteur ;
Ibrahim I. El-Sharkawy, Auteur ;
Roger Thorpe, Auteur
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The objective of this article is to improve the performance of thermally powered adsorption/cooling systems by selecting a new adsorbent/refrigerant pair. Adsorption equilibrium data of R134a onto granular activated carbon (AC) and Unitika activ[...]
Article : texte imprimé
P. Balamurugan, Auteur ;
A. Mani, Auteur
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Experimental investigation on the performance of compact generator of R134a/DMF vapour absorption refrigeration system is presented. The system uses brazed plate heat exchangers as generator, condenser, absorber, evaporator and solution heat exc[...]
Article : texte imprimé
Angelo Freni, Auteur ;
Alessio Sapienza, Auteur ;
Ivan S. Glaznev, Auteur
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In this paper, a novel composite water sorbent “silica modified by calcium nitrate” (SWS-8L) has been tested for utilization in adsorption chillers driven by low-temperature heat. The isosteric diagram of the working pair under investigation has[...]
Article : texte imprimé
Yu.I. Aristov, Auteur ;
A. Sapienza, Auteur ;
D.S. Ovoshchnikov, Auteur
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In an adsorption cycle it is common to have an equal duration of the adsorption and desorption phases. In this paper, we investigated an intermittent cooling cycle with variable adsorption/desorption duration at fixed total cycle time. A new com[...]
Article : texte imprimé
T.X. Li, Auteur ;
R.Z. Wang, Auteur ;
J.K. Kiplaga, Auteur
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A multi-mode thermochemical sorption refrigeration system is presented for solar-powered cooling. The proposed system consists of three sorption refrigeration thermodynamic cycles that can be alternately operated based on the available solar ene[...]
Article : texte imprimé
S.K. Henninger, Auteur ;
M. Schicktanz, Auteur ;
P.P.C. Hügenell, Auteur
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In this first part a comprehensive thermophysical characterisation of six activated carbons – based on coconut, peat and stone coal with focus on thermally driven chillers is reported. Pore and surface analysis are performed using N2 and CO2 ads[...]
Article : texte imprimé
M. Schicktanz, Auteur ;
P. Hügenell, Auteur ;
S.K. Henninger, Auteur
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This paper describes a simple energy balance model based on static parameters to calculate the COP of an adsorption chiller. The model leads to an analytical equation using basic information about the working pair, the chiller design and the ope[...]
Article : texte imprimé
Onur Taylan, Auteur ;
Derek K. Baker, Auteur ;
Bilgin Kaftanoğlu, Auteur
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Models are presented for ideal thermal wave adsorption cooling cycles without mass recovery, with adiabatic mass recovery and with isothermal mass recovery. Coefficient of performance (COP) values obtained from simulations are compared with the [...]
Article : texte imprimé
S.J. Metcalf, Auteur ;
R.E. Critoph, Auteur ;
Z. Tamainot-Telto, Auteur
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Computational modelling of multiple-bed and thermal wave adsorption cycles is carried out in order to determine which method of heat recovery gives the superior trade off between coefficient of performance (COP) and power density (the power outp[...]
Article : texte imprimé
Hamid Niazmand, Auteur ;
Iman Dabzadeh, Auteur
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A transient two-dimensional numerical model of combined heat and mass transfer in the adsorbent bed of a silica gel/water adsorption chiller is presented for a cylindrical bed with annular fins. The bed transient transport behaviors are discusse[...]
Article : texte imprimé
O. Kotenko, Auteur ;
H. Moser, Auteur ;
R. Rieberer, Auteur
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Three groups of alternative absorption heat pumping processes (AHP) with different natural working fluids are being analyzed in this paper:
Image Absorption heat transformer (AHT) process using partially miscible working mixtures;
Image AHP-pr[...]
Article : texte imprimé
Giuseppe Starace, Auteur ;
Lorenzo De Pascalis, Auteur
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The results about the performance of a new DAR’s thermodynamic model are compared with the predictions of Zohar et al. (2009). The main difference is due to an accurate modeling of the refrigerant composition, assumed there as pure ammonia. A se[...]
Article : texte imprimé
Sangsoo Lee, Auteur ;
Lalit Kumar Bohra, Auteur ;
Srinivas Garimella, Auteur
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Heat and mass transfer in a horizontal-tube falling-film ammonia-water absorber was investigated. A tube bank consisting of four columns of six 9.5 mm nominal OD, 0.292 m long tubes was installed in a shell that allowed heat and mass transfer me[...]
Article : texte imprimé
Francisco Táboas, Auteur ;
Manel Vallès, Auteur ;
Bourouis, Mahmoud, Auteur
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Plate heat exchangers are gaining acceptance in absorption refrigeration systems due to their high transfer rates, compactness, and low refrigerant charge. Nevertheless, boiling heat transfer and pressure drop studies with mixtures in plate heat[...]
Article : texte imprimé
Hyundae Kim, Auteur ;
Jinhee Jeong, Auteur ;
Yong Tae Kang, Auteur
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The objectives of this study are to visualize the dispersion of nano-particles in binary nanofluids, to find the effect of key parameters such as SiO2 nano-particles concentration on the distribution stability in the H2O/LiBr nanofluids, and to [...]
Article : texte imprimé
İsmail Solmuş, Auteur ;
D. Andrew S. Rees, Auteur ;
Cemil Yamalı, Auteur
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In this study, the influence of several design parameters on the transient distributions of temperature, pressure and amount adsorbed in the radial direction of a cylindrical adsorbent bed of an adsorption cooling unit using silica gel/water hav[...]
Article : texte imprimé
A. K. Ramzy, Auteur ;
Ravikiran Kadoli, Auteur ;
T.P. Ashok Babu, Auteur
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The transient heat and mass transfer in a desiccant packed bed containing varying particle diameter distribution along the axial direction has been investigated using the pseudo gas controlled approach that considers the heat conduction in the b[...]
Article : texte imprimé
Khaled Gommed, Auteur ;
Gershon Grossman, Auteur
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This study is concerned with an open absorption (liquid desiccant) system, capable of producing both cooling and dehumidification for air conditioning, utilizing low-grade heat. The system includes a novel solution heat and mass exchanger (HME) [...]
Article : texte imprimé
Kim Choon Ng, Auteur ;
Kyaw Thu, Auteur ;
Bidyut Baran Saha, Auteur
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This article presents the performance analysis of a waste heat-driven adsorption cycle. With the implementation of adsorption–desorption phenomena, the cycle simultaneously produces cooling energy and high-grade potable water. A mathematical mod[...]
Article : texte imprimé
This paper proposed and designed a fluidized-bed adsorber/desorber which can be used in the adsorption refrigeration system in place of the conventional fixed-bed one. An experimental setup was built to investigate the performance of the fluidiz[...]
Article : texte imprimé
Salvatore Vasta, Auteur ;
Angelo Freni, Auteur ;
Alessio Sapienza, Auteur
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This paper is focused on the description of a mobile adsorption chiller for cooling in a truck cabin and its experimental performance. The prototype, designed and built at CNR – ITAE, consists of a double-bed adsorber connected with an evaporato[...]
Article : texte imprimé
G. Gutiérrez-Urueta, Auteur ;
P. Rodríguez, Auteur ;
F. Ziegler, Auteur
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Various researchers have developed models of conventional H2O–LiBr absorption machines with the aim of predicting their performance. In this paper, the methodology of characteristic equations developed by Hellmann et al. (1998) is applied. This [...]
Article : texte imprimé
S. Saulich, Auteur ;
U. Jakob, Auteur ;
M.J. Cook, Auteur
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This paper presents work on a holistic approach for improving the overall design of solar cooling systems. Newly developed methods for hydraulics and control were used to redesign an existing pilot plant. Measurements taken from the newly develo[...]
Article : texte imprimé
Ursula Eicker, Auteur ;
Dirk Pietruschka, Auteur ;
Ruben Pesch, Auteur
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Efficient heat rejection is crucial for the overall primary energy balance of sorption systems, as it dominates the auxiliary energy consumption. Low ratios of cooling power to auxiliary electricity of 3.0 or less are still common in sorption sy[...]
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