Analysis and optimization of a heat pump system coupled to an installation of PVT panels and a seasonal storage tank on an educational building

•Solar assisted heat pump coupled to a seasonal storage allows heating production.•Seasonal storage of thermal energy is technical and economically feasible.•Seasonal storage is able to be implemented in middle latitude.•PVT panels performance increase with the inclusion of a seasonal storage tank.•...

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Bibliographic Details
Published in:Energy and buildings 2020-11, Vol.226, p.110373, Article 110373
Main Authors: Del Amo, A., Martínez-Gracia, A., Pintanel, T., Bayod-Rújula, A.A., Torné, S.
Format: Article
Language:English
Subjects:
Buildings
Configurations
Construction
Design
Education
Heat exchangers
Heat pumps
Heating
Installation
Optimization
Payback periods
Photovoltaic/thermal hybrid solar panels
Photovoltaics
Seasonal storage
Simulation
Solar assisted heat pump
Storage tanks
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Summary:•Solar assisted heat pump coupled to a seasonal storage allows heating production.•Seasonal storage of thermal energy is technical and economically feasible.•Seasonal storage is able to be implemented in middle latitude.•PVT panels performance increase with the inclusion of a seasonal storage tank.•Key sizing factors are solar field area, volume of storage and capacity of heat pump. A water-water solar-assisted heat pump (SAHP) is projected on an under construction academic building at the University of Zaragoza (Spain). It integrates a heat pump heating system with photovoltaic/thermal collectors and seasonal storage. Because of its innovative design, considerably higher performances than a conventional type air-source heat pump are expected. This paper shows the simulation of the system performed in TRNSYS, a graphically based software used to simulate the behavior of transient systems. In addition, starting from the current design of the energy system, different sensibility analysis are simulated in order to study alternative configurations of the heating system. The solar coverage of the current installation design is about 60% and the expected savings yield to a payback period of 15,4 years. Three alternative configurations are proposed in this work, reaching up to around 98% of solar coverage. The study results show the technical and economic feasibility of the heating installation based on a solar assisted heat pump with implementation of seasonal storage in an educational building located in a middle latitude.
ISSN:0378-7788
1872-6178
DOI:10.1016/j.enbuild.2020.110373