Controlled Natural Ventilation Coupled with Passive PCM System to Improve the Cooling Energy Performance in Office Buildings

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Title: Controlled Natural Ventilation Coupled with Passive PCM System to Improve the Cooling Energy Performance in Office Buildings
Authors: Saffari, MohhamadPrabhakar, Mohitde Gracia, AlvaroMangina, EleniFinn, DonalCabeza, Luisa F.
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Date: 4-Sep-2019
Online since: 2020-09-01T15:10:48Z
Abstract: The building sector is responsible for consuming one-third of the global final energy use. In office buildings, high internal heat gains increase the cooling energy use. Thermal energy storage (TES) is a promising technology to decrease the cooling energy use, to achieve a low-carbon future, and to increase thermal comfort if properly designed. An appropriate use of the passive PCM system and natural ventilation can provide long-term energy and thermal comfort benefits. Many factors influence the efficient use of passive PCM system in buildings, such as outdoor/indoor boundary conditions, and HVAC control strategies. In office buildings, the PCM passive system integrated into the building envelope has the potential to regulate the indoor air temperature by absorbing high internal heat gains during day, however, discharging the PCM during night to work efficiently for the next day remains a challenging design criterion. The passive PCM system would not work efficiently if charging/discharging cycle is not completed. Whole-building energy simulation tools and numerical models are essential to deal with this issue. The present study is aimed at defining cooling energy savings in office buildings located in temperate climates applying PCM and natural ventilation passive technologies. A reference small office building was chosen and PCM panels with optimised melting temperature together with different natural ventilation control strategies were applied to an office building model. EnergyPlus airflow network capability was used to calculate the natural ventilation potential induced by wind and buoyancy effects. Simulation results have shown cooling energy savings from 8% to 15%. In addition, natural ventilation could increase the efficiency of PCM by 8%.
Funding Details: European Commission Horizon 2020
Science Foundation Ireland
metadata.dc.description.othersponsorship: Agency for Business Competitiveness of the Government of Catalonia
Ministerio de Economía y Competitividad de España
Type of material: Conference Publication
Publisher: IBPSA
Keywords: Phase change materialOffice buildingsEnergy useNatural ventilation
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Language: en
Status of Item: Peer reviewed
Is part of: Proceedings of the 16th IBPSA Conference Rome, Italy, Sept. 2-4, 2019
Conference Details: The 16th International Building Performance Simulation Association Conference (IBPSA 2019), Rome, Italy, 2-4 September 2019
Appears in Collections:Mechanical & Materials Engineering Research Collection
Computer Science Research Collection
Energy Institute Research Collection

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