The energy needs of buildings consists of both thermal energy and electricity that may be satisfied by renewable energy sources. In buildings with ambitious energy targets or limited available areas for local energy generation, solar thermal and photovoltaic plants could eventually compete among them to find necessary surfaces. A technology able to simultaneously satisfy the electric and thermal production is given by PV/T modules, which allow a higher conversion rate of the absorbed solar radiation than standard PV modules. In this paper, a comparison between separate photovoltaic and solar thermal systems (PV-ST) and hybrid photovoltaic thermal system (PV/T) is showed. The study is carried out having as target a residential unit located in the city of Catania, just in the center of the Mediterranean area. The performance analysis show that when there is a scarceness of available surface the PV/T system produces about 34.0% more energy than the separate systems which take up the same surface. Moreover, it was observed that to split the surface take up by ST or PV modules, when the percentage allocated to the ST module between 20 to 60%, does not give important differences in terms of global energy produced.
A comparison among hybrid PV/T, PV and ST plants in a residential building facility
Gagliano, Antonio
;Tina, Giuseppe M.;Aneli, Stefano;
2018-01-01
Abstract
The energy needs of buildings consists of both thermal energy and electricity that may be satisfied by renewable energy sources. In buildings with ambitious energy targets or limited available areas for local energy generation, solar thermal and photovoltaic plants could eventually compete among them to find necessary surfaces. A technology able to simultaneously satisfy the electric and thermal production is given by PV/T modules, which allow a higher conversion rate of the absorbed solar radiation than standard PV modules. In this paper, a comparison between separate photovoltaic and solar thermal systems (PV-ST) and hybrid photovoltaic thermal system (PV/T) is showed. The study is carried out having as target a residential unit located in the city of Catania, just in the center of the Mediterranean area. The performance analysis show that when there is a scarceness of available surface the PV/T system produces about 34.0% more energy than the separate systems which take up the same surface. Moreover, it was observed that to split the surface take up by ST or PV modules, when the percentage allocated to the ST module between 20 to 60%, does not give important differences in terms of global energy produced.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
