E3S Web Conf.
Volume 343, 202252nd AiCARR International Conference “HVAC and Health, Comfort, Environment - Equipments and Design for IEQ and Sustainability”
|Number of page(s)||14|
|Section||Research, Energy Efficiency and Sustainability|
|Published online||08 March 2022|
Evaluation of mixed mode ventilation cooling energy saving potential in nZEB: A case study in Southern Italy
1 Department of Civil Engineering and Architecture, Polytechnic University of Bari, DICAR -Via Edoardo Orabona, 4, 70126 Bari, Italy
2 Department of Architectural Science, Ryerson University, 350 Victoria St., Toronto, ON M5B 2K3, Canada
* Corresponding author: firstname.lastname@example.org
In recent decades, reducing the energy demand of the building sector has become a major goal of global policies. Proper design of the building-plant system is hence strategic to achieve nearly zero energy building (NZEB) target. This paper reports the results of modeling the building-plant system of an NZEB in Southern Italy. The case study is a multi-family complex of eight dwellings located in Bari, in the Apulia region. The building project originates from the energy refurbishment of a former industrial shed that was demolished and rebuilt for residential use. The planned HVAC system foresees the combined use of primary ventilation with fan-coil units fed by two ground source heat pumps (GSHP) supplied by eight vertical probes. Three hybrid ventilation strategies have been compared to evaluate the potential cooling energy saving: the first one examines an earth-to-air heat exchanger (EAHX), the second one proposes night hybrid ventilation from 10 pm to 6 am, and the last considers the adoption of free cooling in mechanical ventilation. Economic and energy comparisons among these three approaches are reported. Using EAHX, the cooling consumption saving reached about 20.7% The use of night ventilation combined with MVS can reduce the cooling energy demand for 14.4%, while free cooling in MVS produces a less effective decrease in the electricity consumption for cooling of about 7.7%. All three strategies generate major benefits in the middle-season.
© The Authors, published by EDP Sciences, 2022
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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