Documents disponibles écrits par cet auteur

Composite sorbent of methanol “lithium chloride in mesoporous silica gel” for adsorption cooling machines / Larisa G. Gordeeva in Industrial & engineering chemistry research, Vol. 48 N° 13 (Juillet 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 13 (Juillet 2009) . - pp. 6197–6202 Titre : Composite sorbent of methanol “lithium chloride in mesoporous silica gel” for adsorption cooling machines : performance and stability evaluation Type de document : texte imprimé Auteurs : Larisa G. Gordeeva, Auteur ; Angelo Freni, Auteur ; Yuri I. Aristov, Auteur Année de publication : 2009 Article en page(s) : pp. 6197–6202 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Methanol  lithium  chloride  Mesoporous  silica  gelAdsorption  cooling  machines  Thermogravimetric  technique Résumé : In this paper, a novel composite sorbent of methanol “lithium chloride in mesoporous silica gel” is proposed for adsorption cooling machines. Methanol sorption isotherms were measured by a thermogravimetric technique. This composite demonstrated outstanding methanol sorption ability (up to 0.6 g of methanol per 1 g of dry sorbent). The thermodynamic coefficient of performance (COP), calculated by mathematical modeling for a basic cooling cycle, can reach 0.72 at desorption temperature of 343 K. The real performance was measured by testing this novel material in a lab-scale adsorption chiller. The specific cooling power of 210−290 W/kg and real cooling COP of 0.32−0.4 were obtained. Cycling stability of the sorbent was successfully verified. Such results indicate that the new composite sorbent “lithium chloride in mesoporous silica gel” can be recommended for application in adsorption cooling machines driven by low temperature heat. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8016303 [article] Composite sorbent of methanol “lithium chloride in mesoporous silica gel” for adsorption cooling machines : performance and stability evaluation [texte imprimé] / Larisa G. Gordeeva, Auteur ; Angelo Freni, Auteur ; Yuri I. Aristov, Auteur . - 2009 . - pp. 6197–6202. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 13 (Juillet 2009) . - pp. 6197–6202 Mots-clés : Methanol  lithium  chloride  Mesoporous  silica  gelAdsorption  cooling  machines  Thermogravimetric  technique Résumé : In this paper, a novel composite sorbent of methanol “lithium chloride in mesoporous silica gel” is proposed for adsorption cooling machines. Methanol sorption isotherms were measured by a thermogravimetric technique. This composite demonstrated outstanding methanol sorption ability (up to 0.6 g of methanol per 1 g of dry sorbent). The thermodynamic coefficient of performance (COP), calculated by mathematical modeling for a basic cooling cycle, can reach 0.72 at desorption temperature of 343 K. The real performance was measured by testing this novel material in a lab-scale adsorption chiller. The specific cooling power of 210−290 W/kg and real cooling COP of 0.32−0.4 were obtained. Cycling stability of the sorbent was successfully verified. Such results indicate that the new composite sorbent “lithium chloride in mesoporous silica gel” can be recommended for application in adsorption cooling machines driven by low temperature heat. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8016303

Development and lab-test of a mobile adsorption air-conditioner / Salvatore Vasta in International journal of refrigeration, Vol. 35 N° 3 (Mai 2012) 

Public ISBD [article]  in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 701–708 Titre : Development and lab-test of a mobile adsorption air-conditioner Titre original : Conditionneur d'air mobile à adsorption: Développement et essais en laboratoire Type de document : texte imprimé Auteurs : Salvatore Vasta, Auteur ; Angelo Freni, Auteur ; Alessio Sapienza, Auteur Année de publication : 2012 Article en page(s) : pp. 701–708 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Adsorption  Air  conditioning  Zeolite  Water Résumé : 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 evaporator and a condenser and driven by the low grade thermal energy coming from the engine coolant loop. Overall volume and weight of the machine are 170 dm3 and 60 kg, respectively. Performance assessment was preliminarily carried out at ITAE laboratory under the typical EU car air conditioning conditions. The experimental results obtained showed that the system is able to deliver an Average Cooling Power ACP = 1–2.3 kW and a Cooling COP = 0.25–0.45, at a desorption temperature of about 90 °C (Tev ∼ 8–14 °C and Tcon ∼ 28–35 °C). Afterwards, the cooling system was integrated in a real truck cabin (IVECO STRALIS) and tested on a laboratory test bench, where the engine cooling loop was simulated through an ideal heat source, so demonstrating that the chiller is able to provide cooling comfort to the passengers. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000764 [article] Development and lab-test of a mobile adsorption air-conditioner = Conditionneur d'air mobile à adsorption: Développement et essais en laboratoire [texte imprimé] / Salvatore Vasta, Auteur ; Angelo Freni, Auteur ; Alessio Sapienza, Auteur . - 2012 . - pp. 701–708. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 701–708 Mots-clés : Adsorption  Air  conditioning  Zeolite  Water Résumé : 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 evaporator and a condenser and driven by the low grade thermal energy coming from the engine coolant loop. Overall volume and weight of the machine are 170 dm3 and 60 kg, respectively. Performance assessment was preliminarily carried out at ITAE laboratory under the typical EU car air conditioning conditions. The experimental results obtained showed that the system is able to deliver an Average Cooling Power ACP = 1–2.3 kW and a Cooling COP = 0.25–0.45, at a desorption temperature of about 90 °C (Tev ∼ 8–14 °C and Tcon ∼ 28–35 °C). Afterwards, the cooling system was integrated in a real truck cabin (IVECO STRALIS) and tested on a laboratory test bench, where the engine cooling loop was simulated through an ideal heat source, so demonstrating that the chiller is able to provide cooling comfort to the passengers. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000764

Experimental testing of a lab-scale adsorption chiller using a novel selective water sorbent “silica modified by calcium nitrate” / Angelo Freni in International journal of refrigeration, Vol. 35 N° 3 (Mai 2012) 

Public ISBD [article]  in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 518–524 Titre : Experimental testing of a lab-scale adsorption chiller using a novel selective water sorbent “silica modified by calcium nitrate” Titre original : Essais expérimentaux sur un refroidisseur à adsorption à l'échelle du laboratoire employant un sorbant d'eau à base de gel de silice modifié à l'aide du nitrate de calcium Type de document : texte imprimé Auteurs : Angelo Freni, Auteur ; Alessio Sapienza, Auteur ; Ivan S. Glaznev, Auteur Année de publication : 2012 Article en page(s) : pp. 518–524 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Adsorption  chiller  Water  Silica  gel  Additive  Nitrate  Calcium  Evaluation  Performance Résumé : 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 been calculated from experimental adsorption data measured at equilibrium. The equivalent specific heat of the sorbent as a function of the water loading was experimentally measured by a calorimetric technique. Thermodynamic cooling COP was estimated to be 0.51–0.71, with desorption temperature lower than 90 °C. Real performance was measured by testing a SWS-8L based sorbent bed in a lab-scale adsorption chiller. With this aim, SWS-8L grains were embedded inside a compact aluminium heat exchanger with high thermal efficiency. Experimental cooling COP, mass specific cooling power SCP and volumetric specific cooling power VSCP obtained are 0.18–0.31 (cycle time 10 min), 190–389 W/kg dry sorbent and 104–212 W/dm3, respectively. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001131 [article] Experimental testing of a lab-scale adsorption chiller using a novel selective water sorbent “silica modified by calcium nitrate” = Essais expérimentaux sur un refroidisseur à adsorption à l'échelle du laboratoire employant un sorbant d'eau à base de gel de silice modifié à l'aide du nitrate de calcium [texte imprimé] / Angelo Freni, Auteur ; Alessio Sapienza, Auteur ; Ivan S. Glaznev, Auteur . - 2012 . - pp. 518–524. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 518–524 Mots-clés : Adsorption  chiller  Water  Silica  gel  Additive  Nitrate  Calcium  Evaluation  Performance Résumé : 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 been calculated from experimental adsorption data measured at equilibrium. The equivalent specific heat of the sorbent as a function of the water loading was experimentally measured by a calorimetric technique. Thermodynamic cooling COP was estimated to be 0.51–0.71, with desorption temperature lower than 90 °C. Real performance was measured by testing a SWS-8L based sorbent bed in a lab-scale adsorption chiller. With this aim, SWS-8L grains were embedded inside a compact aluminium heat exchanger with high thermal efficiency. Experimental cooling COP, mass specific cooling power SCP and volumetric specific cooling power VSCP obtained are 0.18–0.31 (cycle time 10 min), 190–389 W/kg dry sorbent and 104–212 W/dm3, respectively. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001131