Stratification Enhancement for an Integrated Collector Storage Solar Water Heater (ICSSWH)

Marie Swiatek (1, 2) , Gilles Fraisse (1, 2) , Mickael Pailha (1, 2)

1 LOCIE - LabOratoire proCédés énergIe bâtimEnt
2 USMB [Université de Savoie] [Université de Chambéry] - Université Savoie Mont Blanc

Stratification is a key point in increasing performances of storage systems. The experimental study conducted only focuses on the charging of a high aspect ratio cavity representing the storage system of an ICSSWH, and the exchange with the solar collector is modeled by a constant heat flux. Thermal stratifica-tion is enhanced by placing in the system a stratification plate and by changing the position of the heat exchange zone between solar collector and storage. The parameters that vary in this study are the angle of inclination of the system (30, 45 and 60 ° relative to the horizontal), the heat flux imposed (1800, 2700 and 3600 W/m 2) and the length of the stratification plate. The experiments lasted three hours. Satisfying stratification was obtained, mainly due to the reverse flow occurring in the system. However, this phenomenon increases with time and could result in creating a dead volume under the heat exchange area. This aspect will be further studied using CFD models. The impact of a good thermal stratification in the system will also be studied by determining the annual performance of the ICSSWH.

Mots clés: ICSSWH; PIV; thermal stratification; reverse flow

Domaines: Sciences de l'ingénieur [physics]

Marie Swiatek, Gilles Fraisse, Mickael Pailha. Stratification Enhancement for an Integrated Collector Storage Solar Water Heater (ICSSWH). Energy and Buildings, 2015, 106, pp.35 - 43. ⟨10.1016/j.enbuild.2015.07.005⟩. ⟨hal-01923906⟩