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Sustainability 2016, 8(11), 1172; doi:10.3390/su8111172

Computational Fluid Dynamic Modelling of Thermal Periodic Stabilized Regime in Passive Buildings

Department of Astronautical, Electrical and Energy Engineering (DIAEE), Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
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Academic Editors: Francesco Asdrubali and Pietro Buzzini
Received: 30 September 2016 / Revised: 27 October 2016 / Accepted: 10 November 2016 / Published: 12 November 2016
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Abstract

The periodic stabilized regime is the condition where the temperature of each point of a certain environment varies following a periodic law. This phenomenon occurs in many practical applications, such as passive or ancient buildings not equipped with Heating, Ventilating and Air Conditioning HVAC systems and located in latitudes where the temperature greatly varies with Earth’s daily cycles. Despite that, the study of transient phenomena is often simplified, i.e., considering negligible the thermal response of the indoor microclimate. An exact solution to enclosures whose microclimate is free to evolve under a periodic stabilized regime does not exist nowadays, also from an analytical point of view. The aim of this study is to parametrically analyze the thermal variations inside a room when a transient periodic temperature is applied on one side. The phenomenon has been numerically studied through Computational Fluid Dynamics (CFD) and analytically validated using a function that reproduces the daily variation of the outdoor temperature. The results of this research would lay the groundwork to develop analytical correlations to solve and predict the thermal behavior of environments subject to a periodic stabilized regime. View Full-Text
Keywords: periodic stabilized regime; CFD; combined heat transfer; time-dependent boundary conditions; passive buildings periodic stabilized regime; CFD; combined heat transfer; time-dependent boundary conditions; passive buildings
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MDPI and ACS Style

Nardecchia, F.; Mattoni, B.; Pagliaro, F.; Cellucci, L.; Bisegna, F.; Gugliermetti, F. Computational Fluid Dynamic Modelling of Thermal Periodic Stabilized Regime in Passive Buildings. Sustainability 2016, 8, 1172.

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