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Development of microwave assisted zeolite–water adsorption heat pump / Hasan Demir in International journal of refrigeration, Vol. 36 N° 8 (Décembre 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2289–2296 Titre : Development of microwave assisted zeolite–water adsorption heat pump Titre original : Développement d'une pompe à chaleur à adsorption eau-zéolite fonctionnant en partie à l'aide de micro-ondes Type de document : texte imprimé Auteurs : Hasan Demir, Auteur Année de publication : 2014 Article en page(s) : pp. 2289–2296 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Microwave  heating;  dielectric  heating;  adsorption  heat  pump;  volumetric  cooling  power;  zeolite  water  pair Résumé : A microwave assisted zeolite–water adsorption heat pump system was designed, manufactured and investigated experimentally. The influence of operation time of microwave oven on performance of the adsorption heat pump was studied. The performance criteria: coefficient of performance, specific cooling power and volumetric cooing power, were calculated for the designed and tested adsorption heat pump system. The regeneration of adsorbent bed was achieved very rapidly (35 min) by using microwave heating system. The poor thermal conductivity of adsorbent did not affect the periods of isosteric heating and isobaric desorption processes. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001692 [article] Development of microwave assisted zeolite–water adsorption heat pump = Développement d'une pompe à chaleur à adsorption eau-zéolite fonctionnant en partie à l'aide de micro-ondes [texte imprimé] / Hasan Demir, Auteur . - 2014 . - pp. 2289–2296. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2289–2296 Mots-clés : Microwave  heating;  dielectric  heating;  adsorption  heat  pump;  volumetric  cooling  power;  zeolite  water  pair Résumé : A microwave assisted zeolite–water adsorption heat pump system was designed, manufactured and investigated experimentally. The influence of operation time of microwave oven on performance of the adsorption heat pump was studied. The performance criteria: coefficient of performance, specific cooling power and volumetric cooing power, were calculated for the designed and tested adsorption heat pump system. The regeneration of adsorbent bed was achieved very rapidly (35 min) by using microwave heating system. The poor thermal conductivity of adsorbent did not affect the periods of isosteric heating and isobaric desorption processes. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001692

The use of metal piece additives to enhance heat transfer rate through an unconsolidated adsorbent bed / Hasan Demir in International journal of refrigeration, Vol. 33 N° 4 (Juin 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 714-720 Titre : The use of metal piece additives to enhance heat transfer rate through an unconsolidated adsorbent bed Titre original : Additifs sous forme de particules métalliques utilisés afin d’augmenter le transfert de chaleur à travers un lit absorbant non consolidé Type de document : texte imprimé Auteurs : Hasan Demir, Auteur ; Moghtada Mobedi, Auteur ; Semra Ülkü, Auteur Année de publication : 2010 Article en page(s) : pp. 714-720 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Adsorption  system  Water  Silica  gel  Improvement  Adsorber  Additive  Particle  Metal  Thermal  conductivity  Bed Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The effects of metal piece additives on effective thermal conductivity and diffusivity of an unconsolidated adsorbent bed in which adsorbent is silica gel were investigated. The metal piece additives were copper, brass, aluminum and stainless steel with two different sizes as 1.0–2.8 mm and 2.8–4.75 mm. The effective thermal conductivity and diffusivity of the mixed bed were predicted by comparison of the experimental results with the solution of dimensionless heat conduction equation for the bed. The performed experiments showed that the addition 15wt% of aluminum pieces with sizes between 1.0 and 2.8 mm enhances the effective thermal diffusivity and conductivity of a pure silica gel bed by 157% and 242%, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000137 [article] The use of metal piece additives to enhance heat transfer rate through an unconsolidated adsorbent bed = Additifs sous forme de particules métalliques utilisés afin d’augmenter le transfert de chaleur à travers un lit absorbant non consolidé [texte imprimé] / Hasan Demir, Auteur ; Moghtada Mobedi, Auteur ; Semra Ülkü, Auteur . - 2010 . - pp. 714-720. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 714-720 Mots-clés : Adsorption  system  Water  Silica  gel  Improvement  Adsorber  Additive  Particle  Metal  Thermal  conductivity  Bed Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The effects of metal piece additives on effective thermal conductivity and diffusivity of an unconsolidated adsorbent bed in which adsorbent is silica gel were investigated. The metal piece additives were copper, brass, aluminum and stainless steel with two different sizes as 1.0–2.8 mm and 2.8–4.75 mm. The effective thermal conductivity and diffusivity of the mixed bed were predicted by comparison of the experimental results with the solution of dimensionless heat conduction equation for the bed. The performed experiments showed that the addition 15wt% of aluminum pieces with sizes between 1.0 and 2.8 mm enhances the effective thermal diffusivity and conductivity of a pure silica gel bed by 157% and 242%, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000137