Solar and Heat Pump Systems for Domestic Hot Water Production on a Small Island: The Case Study of Lampedusa
Source abstract
Abstract
The achievement of United Nations Sustainable Development Goals, related to energy and resource use, is a critical issue for small and insulated communities. In many minor islands, solar energy is not correctly exploited, and electrical heaters are connected to weak grids with very a high share of generation by fossil fuels. As a consequence, there is the necessity to assess the potential and the suitability of diffusion of alternative systems to avoid dependency on the electrical grid and reduce carbon emissions. This paper aims to evaluate the technical and economic performances of some alternative systems exploiting renewable energy for domestic hot water production. Four different systems were simulated and studied: a heat pump connected to the grid, a heat pump coupled with a photovoltaic plant, a heat pump combined with a solar thermal collector, and a solar thermal plant. Moreover, heat and electricity storages were studied for reducing impacts on the distribution network. The work presents data gathered for a study on energy-retrofit strategies on Lampedusa Island (Italy, 35°30′56″ north (N), 568 degree-days). Finally, to select the most cost-effective plant, an economic analysis of the chosen systems was carried out. This analysis shows that the best net present values are associated with the heat pump (HP) coupled with a stand-alone PV system and a small battery and solar thermal-assisted HP. The shortest payback time was calculated for the solar thermal system.
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Research context
OpenAlex topics: Spacecraft and Cryogenic Technologies · Geothermal Energy Systems and Applications · Integrated Energy Systems Optimization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
D’ARCH—Department of Architecture, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy
DII—Department of Engineering, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy
ENEA—Dipartimento Unità per l’Efficienza Energetica (DUEE)-Via Anguillarese, km 1.150, 00123 Roma, Italy
Funding
ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development)
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