Abstract
The energy demand is increasing at global level and also does the related greenhouse gas emissions. Solutions to mitigate their effects on the climate are intensively investigated and among the studies, the implementation of Renewable Energy Systems (RES) at the building level to harvest the renewable energy sources as solar, wind and geothermal are currently in top. These systems are efficient when the building has enough available surfaces, optimal positioned for their installation. In the case of communities with high buildings density, barriers can occur in terms of the lack of available surfaces, self-shadowing, self-shielding and mutual influences between the RES. The paper aims to evaluate the possibilities to extend the implementation of the RES at community level, using the available areas on- or nearby the buildings and nearby the community, maximizing thus the renewable useable potential. Numerical simulations are performed in TRNSYS to evaluate the yearly heating energy demand for a range of residential buildings, starting from a single-family residential building (considered as an unit with 100 m2) to a multi-family residential building (16 units each having 100 m2) highlighting the decrease of the energy demand when increasing the units number in a building. Further on, the yearly energy demand for domestic hot water and lighting is evaluated for each building. An energy mix based on geothermal, solar thermal and photovoltaic systems is simulated in TRNSYS, to mitigate the energy consumption from fossil fuels. The surface/depth of the geothermal heat exchanger is evaluated along with the electrical energy demand to drive a ground coupled heat pump assisted by solar thermal and photovoltaic system. The amounts of renewable energy obtained installing RES on the available buildings’ rooftop, facades and nearby surfaces are comparatively analysed, for these buildings gathered in small communities.
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Acknowledgments
This work was supported by a grant of the Romanian National Authority for Scientific Research and Innovation, CNCS/CCCDI-UEFISCDI, project number PN-III-P2-2.1-PED-2016-0338, within PNCDI III.
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Moldovan, M., Visa, I. (2018). Renewable Energy Systems for a Multi-family Building Community. In: Visa, I., Duta, A. (eds) Nearly Zero Energy Communities. CSE 2017. Springer Proceedings in Energy. Springer, Cham. https://doi.org/10.1007/978-3-319-63215-5_10
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DOI: https://doi.org/10.1007/978-3-319-63215-5_10
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