In this paper, an innovative adsorptive chiller based on 3 hybrid adsorbers is presented as well as results of the first testing campaign performed under real HVAC operating conditions. The prototype presents two main innovative features aimed to achieve high values of cooling power density: (i) a new architecture, with 3 adsorbers connected to a single evaporator and condenser, that allows to perform an advanced machine's management strategy employing unbalanced durations of the isobaric ads-/desorption steps, (ii) hybrid adsorbers realized embedding microporous Silica Gel loose grains into aluminium finned flat tube heat exchangers previously coated with the Mitsubishi AQSOA FAM Z02 sorbent. Water was selected as refrigerant while up to now the machine operates without any mass/heat recovery. A first testing campaign has been carried out at ITAE labs by a test bench specifically developed for thermally driven chillers. Influence of the cycle time as well as the temperature difference between condenser (TM) and evaporator (TL) on the overall performance were highlighted. The experimental measurements showed that the chiller is able to deliver an average cooling power (ACP) ranging between 3.4 and 4.4 kW, a volumetric cooling power (VCP) of 7.25–9.36 kW/m3, with a COP of 0.3–0.35 at TH = 90 °C, TL ∼ 15–18 °C and TM ∼ 25–28 °C.

An innovative adsorptive chiller prototype based on 3 hybrid coated/granular adsorbers

SAPIENZA, ALESSIO
Primo
;
GULLI', GIUSEPPE
Secondo
;
CALABRESE, Luigi;PALOMBA, VALERIA;FRAZZICA, ANDREA;BRANCATO, VINCENZA;VASTA, SALVATORE;FRENI, angelo;BONACCORSI, Lucio Maria
Penultimo
;
CACCIOLA, Gaetano
Ultimo
2016-01-01

Abstract

In this paper, an innovative adsorptive chiller based on 3 hybrid adsorbers is presented as well as results of the first testing campaign performed under real HVAC operating conditions. The prototype presents two main innovative features aimed to achieve high values of cooling power density: (i) a new architecture, with 3 adsorbers connected to a single evaporator and condenser, that allows to perform an advanced machine's management strategy employing unbalanced durations of the isobaric ads-/desorption steps, (ii) hybrid adsorbers realized embedding microporous Silica Gel loose grains into aluminium finned flat tube heat exchangers previously coated with the Mitsubishi AQSOA FAM Z02 sorbent. Water was selected as refrigerant while up to now the machine operates without any mass/heat recovery. A first testing campaign has been carried out at ITAE labs by a test bench specifically developed for thermally driven chillers. Influence of the cycle time as well as the temperature difference between condenser (TM) and evaporator (TL) on the overall performance were highlighted. The experimental measurements showed that the chiller is able to deliver an average cooling power (ACP) ranging between 3.4 and 4.4 kW, a volumetric cooling power (VCP) of 7.25–9.36 kW/m3, with a COP of 0.3–0.35 at TH = 90 °C, TL ∼ 15–18 °C and TM ∼ 25–28 °C.
2016
File in questo prodotto:
File Dimensione Formato  
2016_AE_179_929.pdf

solo gestori archivio

Descrizione: Articolo
Tipologia: Versione Editoriale (PDF)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.52 MB
Formato Adobe PDF
1.52 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/3096657
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 82
  • ???jsp.display-item.citation.isi??? 77
social impact