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Title: A simulation study to assess the impact of natural ventilation on the hygrothermal behaviour of a historic library using EnergyPlus and its Airflow Network
Authors: Saraiva, Nuno Francisco Baía da Silva Garcia 
Gaspar, Adélio 
Costa, José Joaquim da 
Keywords: conservation; airflow network model; natural ventilation
Issue Date: 15-Feb-2021
Publisher: Politecnico di Torino
Citation: Baia Saraiva, Nuno; Gaspar, Adélio Rodrigues; Costa, José Joaquim; "A simulation study to assess the impact of natural ventilation on the hygrothermal behaviour of a historic library using EnergyPlus and its Airflow Network". Conference Proceedings in 15th RoomVent 2020 Conference, Turin, 2021.
Project: This work was supported by the University of Coimbra under project grant BJUC-AHT –“Avaliação Higrotérmica do Ambiente Interior na Biblioteca Joanina da Universidade de Coimbra”. 
Serial title, monograph or event: Conference Proceedings in 15th RoomVent 2020 Conference
Place of publication or event: Turin, Italia
Abstract: Taking a historic library of the University of Coimbra as a study case, this work is focused on assessing the impact and conservation risks of using the main door of its noblest room. From a previous monitoring campaign, it was possible to correlate important fluctuations of the indoor environment conditions with the natural ventilation induced by opening the main door. Consequently, a comprehensive study is required to assess the impact of such ventilation events on the hygrothermal conditions and to study mitigating solutions. The present work is based on the simulation of the hygrothermal behaviour of this heritage building using EnergyPlus and its airflow network (AFN) model that accounts for the effects of natural ventilation. The thermal model of the building is validated by comparing the results with the data available from continuous monitoring campaigns. Several operating configurations with alternative entrances for visitors are simulated. The analysis of the simulation data allows (i) to estimate the heat balance between adjacent spaces of the building; and (ii) to assess the impact of the indoor conditions relatively to the conservation requirements. This assessment is based on the short period fluctuations (SPF) of the indoor air temperature and humidity and on the concept of a performance index (PI), which represents the percentage of measured/predicted data that lie within a range defined by thresholds recommended in the most used guidelines for conservation, namely ASHRAE (2015) and UNI 10829 (1999). The results suggest that the door should remain closed as much as possible. Finally, the need to improve the hygrothermal conditions leaves an open field for further research regarding climate control systems.
Rights: openAccess
Appears in Collections:I&D ADAI - Artigos e Resumos em Livros de Atas

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