Assessment of different airflow modeling approaches on a naturally ventilated Mediterranean building

Faggianelli, Ghjuvan Antone; Brun, Adrien; Wurtz, Étienne; Muselli, Marc

doi:10.1016/j.enbuild.2015.08.038

Cited by 5 publications

(6 citation statements)

References 22 publications

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“…The cooling effect that the sea-land breeze has on mitigating high temperatures and improving human thermal comfort has been demonstrated [28][29][30][31]. Recently, Xie et al [32] studied the convective heat transfer rate on vertical surfaces in island-reef buildings.…”

Section: The Sea-land Breeze Effect and Natural Ventilationmentioning

confidence: 99%

Thermodynamic and thermal comfort optimisation of a coastal social house considering the influence of the thermal breeze

Kerdan

Gálvez

Sousa

et al. 2019

Building and Environment

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Tropical coastal areas are characterised by high levels of wind and solar resources with large potentials to be utilised for low-energy building design. This paper presents a multi-objective optimisation framework capable of evaluating cost-efficient and low-exergy coastal building designs considering the influence of the thermal breeze. An integrated dynamic simulation tool has been enhanced to consider the impacts of the sea-land breeze effect, aiming at potentiating natural cross-ventilation to improve occupant's thermal comfort and reduce cooling energy demand. Furthermore, the technological database considers a wide range of active and passive energy conservation measures. As a case study, a two-storey/two-flat detached social house located in the North-Pacific coast of Mexico has been investigated. The optimisation problem has considered the minimisation of: i. annual exergy consumption, ii. life cycle cost, and iii. thermal discomfort. Optimisation results have shown that adequate building orientation and window opening control to optimise the effects of the thermal breeze, combined with other passive and active strategies such as solar shading devices, an improved envelope's physical characteristics, and solar assisted air source heat pumps have provided the best performance under a limited budget. Compared to the baseline design, the closest to utopia design has increased thermal comfort by 93.8% and reduced exergy consumption by 10.3% whilst increasing the life cycle cost over the next 50 years by 18.5% (from US$39,864 to US$47,246). The importance of renewable generation incentives is further discussed as a counter effect measure for capital cost increase as well as unlocking currently high-cost low-exergy technologies.

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Section: The Sea-land Breeze Effect and Natural Ventilationmentioning

confidence: 99%

Thermodynamic and thermal comfort optimisation of a coastal social house considering the influence of the thermal breeze

Kerdan

Gálvez

Sousa

et al. 2019

Building and Environment

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“…It was demonstrated that optimized night-time natural ventilation regimes and airflow rates can help reduce the overall energy consumption by preventing overheating in summer in the case of a multi-story building located in Belgrad (Serbia), with a naturally ventilated doubleskin facade. In this same scenario, full-scale experiments to determine the airflow rate in naturally ventilated rooms of a building located in Corsica (France), were carried out in cross ventilation configurations in order to develop different airflow modelling approaches [21]. The coupling between thermal models was found out to be suitable for model based natural ventilation control.…”

Section: Introduction and Research Backgroundmentioning

confidence: 99%

The impact of natural ventilation on building energy requirement at inter-building scale

Pisello

Castaldo

Taylor

et al. 2016

Energy and Buildings

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Inter-building effect is responsible for affecting buildings' primary energy requirement for heating, cooling, and lighting. Nevertheless, the impact of natural ventilation should also be considered while predicting building energy demand, since it is documented to substantially affect indoor environmental quality and thermal comfort. This paper investigates the impact of natural ventilation on building primary energy requirement prediction. The Inter-Building Effect (IBE) approach is applied in a typical residential block in Italy. A sensitivity analysis is performed to determine the key input parameter among (i) climate boundary, (ii) infiltration rate, (iii) opening percentage, and (iv) wind strength. Two scenarios, i.e. the stand-alone building and the same building surrounded by its neighborhood, are compared. The thermal-energy dynamic simulation of the different scenarios is carried out to investigate the impact of outdoor airflows on building primary energy requirement for heating and cooling and on indoor thermal comfort, investigated by means of the Thermal Deviation Index method. Inaccuracies in energy need prediction imputable to natural ventilation without taking into account the IBE are detected. The findings show that IBE is much more affected by buildings' opening percentage, infiltration rate, and local wind compared to the weather context since IBE is a local microscale phenomenon. NomenclatureSA Stand-alone configuration of the case study building i.e. 1° case scenario N Network configuration of the case study building i.e. 2° case scenario IBE first version of Inter-Building Effect accounting for primary energy for heating and cooling IBE II second version of Inter-Building Effect accounting for primary energy for heating and cooling, and lighting IP input parameter OP output parameter SC sensitivity coefficient TDI thermal deviation indexTDI b-s building thermal deviation index referred to the building performance for each season "s" (-) TDI BC-S base case thermal deviation index for each season "s" (°C h) TDI b,site-s thermal deviation index referred to the building performance freely from the climate (-) TDI site-s thermal deviation index for each season s referred to the building in relation to the climate °Ch) TDI max,i maximum value of the OP for each i-th IP TDI min,i minimum value of the OP for each i-th IP T a-s location sol-air temperature calculated on a reference horizontal surface (°C) T O-in indoor thermal zone operative temperature (°C) T O,M-s , T O,m-s seasonal target range limits of T O-in (°C) t s seasonal analysis period (h) t T-s , t T-s,site periods during which T O-in and T a-s,site respectively are within the thermal seasonal target (h) T M-s,site , T m-s,site sol-air temperature range limits (°C) P h , P c periods during which T O-in is out of the seasonal thermal target (h) P h,site , P c,site periods during which T a-s is out of the site seasonal thermal target (h) IP i generic input parameter IP max,i maximum value of the i-th IP IP min,i minimum values of the i-th ...

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“…Getting a better estimation of air change rate (ACR) through window openings is a key point for estimating cooling potential and would give some insights to study and design complementary retrofit ventilation strategies. The estimation can be performed either with building simulation models [1] or data-driven statistical models using discrete air speed measurement through windows [2] or tracer gas measurement [3]. However, because of its dependency on weather conditions (local wind speed and turbulence, temperatures), occupancy patterns, and real building properties, the ACR estimation suffers from weak reliability with both modeling and measurement methods [3].…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling of airflow rate through window openings based on CO₂ data

Schreck,

Rouchier,

Foucquier

et al. 2023

J. Phys.: Conf. Ser.

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Better estimation of air change rate in naturally ventilated buildings is a key for supporting passive summer thermal comfort strategies. In window aired configurations, this estimation is challenging either with measurements or building simulation methods. In this study, we describe and apply the state space modeling methodology based on the carbon dioxide concentration (CO2) mass balance equation to a simple test case with numerically generated data. We show that a two-state CO2 / Air Change Rate model is suitable. As a modeling novelty, we demonstrate the benefit of improving the formulation with a variable diffusion term for the air change rate state equation. From the test case study findings, we emphasize that a lower interior-exterior CO2 difference results in weaker performance and we list some prospects for future work.

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Assessment of different airflow modeling approaches on a naturally ventilated Mediterranean building

Cited by 5 publications

References 22 publications

Thermodynamic and thermal comfort optimisation of a coastal social house considering the influence of the thermal breeze

Thermodynamic and thermal comfort optimisation of a coastal social house considering the influence of the thermal breeze

The impact of natural ventilation on building energy requirement at inter-building scale

Dynamic modeling of airflow rate through window openings based on CO₂ data

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Assessment of different airflow modeling approaches on a naturally ventilated Mediterranean building

Cited by 5 publications

References 22 publications

Thermodynamic and thermal comfort optimisation of a coastal social house considering the influence of the thermal breeze

Thermodynamic and thermal comfort optimisation of a coastal social house considering the influence of the thermal breeze

The impact of natural ventilation on building energy requirement at inter-building scale

Dynamic modeling of airflow rate through window openings based on CO2 data

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Product

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Dynamic modeling of airflow rate through window openings based on CO₂ data