Issue |
E3S Web Conf.
Volume 523, 2024
53rd AiCARR International Conference “From NZEB to ZEB: The Buildings of the Next Decades for a Healthy and Sustainable Future”
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Article Number | 03001 | |
Number of page(s) | 14 | |
Section | Innovation in Plants Components and Technologies | |
DOI | https://doi.org/10.1051/e3sconf/202452303001 | |
Published online | 07 May 2024 |
Assessment of the energy performance of a solar/biomass hybrid system for the climatization of smalland medium-scale buildings
1 Department of Industrial Engineering, Alma Mater Studiorum University of Bologna, Italy
2 Institute of Thermal Engineering, Graz University of Technology, Austria
3 Institute of Science and Innovation in Mechanical and Industrial Engineering, University of Porto, Portugal
* Corresponding author: matteo.dongellini@unibo.it
The H2020 EU-funded project Hybrid-BioVGE aims to develop an efficient system entirely based on solar energy and biomass for the climatization of buildings during both the heating and cooling seasons. The most innovative component of the concept is a solar-driven Variable Geometry Ejector (VGE) cooling cycle, which can adjust its internal geometry with two degrees of freedom, according to the effective operating conditions. This paper presents the components of the Hybrid-BioVGE concept and describes a demonstrator of the proposed solution installed in a single-family house in Porto (Portugal). The main characteristics of the building, the size and typology of thermal energy storages included in the system are presented as well. In order to demonstrate the energy-saving potential of the Hybrid-BioVGE concept, the numerical model of the demonstrator was implemented in the TRNSYS 18 environment. Outcomes of simulations include the system’s energy performance for both heating and cooling seasons, the achievable solar fraction and the VGE efficiency. Numerical results show that up to 98% of the system energy input derives from renewable sources, with a solar fraction of 61.5%, during the heating season. On the contrary, the seasonal performance factor in cooling operating mode is lower than expected. The VGE cooling cycle efficiency is mainly penalised by the heat rejection loop, which should be optimised to achieve the best performance.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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