Construction Pathology, Rehabilitation Technology and Heritage Management March 24-27, 2020. Granada, Spain REHABEND 2020 Congress 1 Temperature validation of an advanced hygrothermal model: statistical analysis Barbosa, Francisca 1 ; Peixoto de Freitas 1 , Vasco; Almeida, Manuela 2 . 1: Construct-LFC, Faculty of Engineering, University of Porto, Portugal e-mail: francisca.barbosa@fe.up.pt , e-mail: vpfreita@fe.up.pt 2: CTAC, Department of Civil Engineering, School of Engineering, University of Minho, Portugal e-mail: malmeida@civil.uminho.pt ABSTRACT Portuguese school buildings are generally characterized by an in-service thermal discomfort, due to the poor envelope thermal properties and the lack of resources for paying energy consumption. Portuguese schools are free-running buildings in a Mediterranean temperate climate, with a natural ventilation strategy. The constructive records of the past describe the existence of typified projects for school buildings replicated throughout the country, without the necessary adaptations to the particular climatic situation. Likewise, the replication of solutions in rehabilitation projects, without taking into account the climatic reality, will have repercussions on the hygrothermal environment inside the classrooms. This work studies the Portuguese Brandão basic schools (from the ’70s). About 100 non -refurbished Brandão schools will require some interventions in the near future. A prototype classroom was prepared in a Brandão school, in Porto. With this prototype, some studies were carried out regarding the thermal behavior before and after a refurbishment process, by experimental monitoring. The in situ experimental campaign consisted of temperature, relative humidity, CO2 concentration and energy consumption measurements. This extended experimental campaign (three academic years) was a crucial tool to validate an advanced dynamic hygrothermal model of Heat, Air and Moisture transfer – Wufi Plus. The calibration process consisted of comparing and minoring differences between experimental and numerical results of temperature. Given the duration of an experimental campaign like this and also the cost of the prototype, it was important to dominate and improve the numerical model that replies the in situ conditions and allows the studying of the other Portuguese Brandão buildings. This paper presents the temperature validation of this model in three distinct situations: (1) before refurbishment without heating, (2) after refurbishment without heating and (3) after refurbishment with heating. The main inputs were climatic data, building envelope, inner gains, solar gains, ventilation and heating strategies and the main output was the temperature. KEYWORDS: School buildings; Prototype; Experimental measurement; Numerical simulation; Validation. 1. FRAMEWORK brought to you by CORE View metadata, citation and similar papers at core.ac.uk provided by Universidade do Minho: RepositoriUM