Browsing by Author "Pereda, Ainhoa"
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Item Design and analysis of performance of a DC power optimizer for HCPV systems within CPVMatch project(American Institute of Physics Inc., 2018-09-13) Alonso, Ricardo; Pereda, Ainhoa; Bilbao, Eneko; Cortajarena, Jose Antonio; Vidaurrazaga, Iñigo; Román, Eduardo; Anton, Ignacio; Steiner, Marc; Steiner, Myles; SISTEMAS FOTOVOLTAICOSAs most of PV systems, CPV systems are also affected by mismatching losses, particularly due to misalignment of optics and receivers. As a result, module level power electronics can help to increase their energy yield by making every CPV module deliver it maximum power at the output. Among the different alternatives, solutions based on DC power optimizers exhibit higher conversion efficiencies and lower costs than microinverters. However, while microinverters ensure optimal operation independently from the operating conditions, system design with DC power optimizers must be carefully examined to avoid potential underperformance. This paper describes not only the customized design and validation of a high-efficiency and economical DC power optimizer for HCPV systems, but also a comprehensive analysis of the whole system design to optimize its production under expected working conditions.Item A Solar Dually PVT Driven Direct Expansion Heat Pump One-Year Field Operation Results at Continental Climate(2022-04-27) Sanz, Asier; Martín, Antonio J.; Pereda, Ainhoa; Román, Eduardo; Ibañez, Pedro; Fuente, Raquel; SISTEMAS FOTOVOLTAICOSThe high energy-consuming building sector needs to meet both electricity and heat demands. In a nearly zero energy building scenario, most of the consumed energy would be generated locally by means of renewable solutions that nowadays seem not to provide an attractive performance or cost-competitiveness. Solar-based technologies tend to be the most promising ones, but for high densely populated areas, the usual photovoltaic or thermal single approaches may not be efficient enough. The current work is focused on the analysis of the dual use of the solar resource by means of hybrid PVT collectors and their smart combination with direct expansion heat pumps through predictive control strategies. To that end, a system was developed, installed in a real-use single-family house at a continental climate for domestic hot water application, operated and monitored for one entire year. The average day indicator results show 83% renewable energy share, 220% self-sufficiency ratio, 41% heat pump self-consumption and 46% of the solar fraction.