The paper discusses a combined experimental-numerical analysis of an innovative solar thermal device to be used as an Integrated Collector Storage (ICS) system providing domestic hot water. In this equipment the collector acts also as a storage unit, without requiring an external vessel. Due to its simple configuration, the ICS device was successfully used in several circumstances, especially in extreme situations such as in post-earthquake tent cities or to reach remote users in Africa. In order to assess the efficiency of this collector, the draw-off process was investigated measuring the value of the mean temperature of the water discharging from the tap as cold water filled the collector. In the present configuration the draw-off is not completely optimised and a detailed analysis was carried out in order to investigate the mixing of cold and hot water in the solar collector during the discharge phase. A series of thermocouples was placed in selected positions around the shield of the collector to investigate the evolution of the near wall temperature. Furthermore, a numerical analysis based on Large-Eddy Simulation (LES) of the mixing process inside the collector was carried out using an open source, in-house, finite-volume computational code. Even if some restrictive hypotheses were made on the thermal boundary conditions and the absence of stratification, the LES results gave interesting findings to improve the collector performance. (C) 2012 Elsevier Ltd. All rights reserved.

Experimental and computational investigation of a new solar integrated collector storage system / Borello, Domenico; Corsini, Alessandro; Delibra, Giovanni; Evangelisti, Sara; Micangeli, Andrea. - In: APPLIED ENERGY. - ISSN 0306-2619. - STAMPA. - 97:(2012), pp. 982-989. (Intervento presentato al convegno 3rd International Conference on Applied Energy (ICAE) tenutosi a Perugia, ITALY nel MAY 16-18, 2011) [10.1016/j.apenergy.2012.01.026].

Experimental and computational investigation of a new solar integrated collector storage system

BORELLO, Domenico;CORSINI, Alessandro;DELIBRA, GIOVANNI;EVANGELISTI, SARA;MICANGELI, Andrea
2012

Abstract

The paper discusses a combined experimental-numerical analysis of an innovative solar thermal device to be used as an Integrated Collector Storage (ICS) system providing domestic hot water. In this equipment the collector acts also as a storage unit, without requiring an external vessel. Due to its simple configuration, the ICS device was successfully used in several circumstances, especially in extreme situations such as in post-earthquake tent cities or to reach remote users in Africa. In order to assess the efficiency of this collector, the draw-off process was investigated measuring the value of the mean temperature of the water discharging from the tap as cold water filled the collector. In the present configuration the draw-off is not completely optimised and a detailed analysis was carried out in order to investigate the mixing of cold and hot water in the solar collector during the discharge phase. A series of thermocouples was placed in selected positions around the shield of the collector to investigate the evolution of the near wall temperature. Furthermore, a numerical analysis based on Large-Eddy Simulation (LES) of the mixing process inside the collector was carried out using an open source, in-house, finite-volume computational code. Even if some restrictive hypotheses were made on the thermal boundary conditions and the absence of stratification, the LES results gave interesting findings to improve the collector performance. (C) 2012 Elsevier Ltd. All rights reserved.
2012
integrated solar collector; temperature measurement; simulation of mixing process; large-eddy simulation; draw-off curve
01 Pubblicazione su rivista::01a Articolo in rivista
Experimental and computational investigation of a new solar integrated collector storage system / Borello, Domenico; Corsini, Alessandro; Delibra, Giovanni; Evangelisti, Sara; Micangeli, Andrea. - In: APPLIED ENERGY. - ISSN 0306-2619. - STAMPA. - 97:(2012), pp. 982-989. (Intervento presentato al convegno 3rd International Conference on Applied Energy (ICAE) tenutosi a Perugia, ITALY nel MAY 16-18, 2011) [10.1016/j.apenergy.2012.01.026].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/436715
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