Autor(es): Fernandes, Marco S. ; Costa, Vítor A. F. ; Brites, Gonçalo J. V. N. ; Gaspar, Adélio R. ; Costa, José J.
Data: 2019
Identificador Persistente: https://hdl.handle.net/10316/106820
Origem: Estudo Geral - Universidade de Coimbra
Assunto(s): solar DWH; adsorption; heat storage; energy e ciency; climate conditions; numerical simulation
A numerical study was conducted on the performance of a solar domestic hot water storage system with an adsorption module operating in seven di erent world locations. The base system was optimized for Portuguese conditions and, without changing the system itself and the water consumption profile, its performance was investigated by altering local installation and operating conditions and solar collector inclination angles. The overall dynamical model of the system was used for numerical simulations. The improved performance of the system was assessed by the reduction achieved on the annual energy consumption of a backup water heater when compared with a similar conventional energy storage system (without an adsorption module). The results showed that the best performances were obtained in locations where winter and summer are clearly defined, especially locations where winters are colder, and with solar collectors’ inclination angles larger than the local latitude, except for locations with low latitudes, where solar collectors’ inclination angles are not so relevant to the system performance. It was also discussed how the performance results must be carefully analyzed, as for low-latitude locations the absolute savings are in fact smaller even if their relative values are of the same order or even higher than for higher-latitude locations.
This research work was funded by the Portuguese Foundation for Science and Technology (FCT) and by the European Regional Development Fund (FEDER) through COMPETE 2020—Operational Program for Competitiveness and Internationalization (POCI) in the framework of the research project Ren4EEnIEQ (grant numbers: PTDC/EMS-ENE/3238/2014, POCI-01-0145-FEDER-016760, and LISBOA-01-0145-FEDER-016760). Vítor A.F. Costa acknowledges the FCT for the financial support provided through the projects (grant numbers: UID/EMS/00481/2013-FCT and CENTRO-01-0145-FEDER-022083).
