Application of CFD Tools to Optimize Natural Building Ventilation Design

Teixeira, José Carlos; Lomba, Ricardo; Teixeira, Senhorinha; Lobarinhas, Pedro

doi:10.1007/978-3-642-31137-6_15

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…These tools integrate a robust catalogue of heating and cooling systems, construction and glazing materials and even occupation and acclimatization usage profiles can be established. The use of such simulation tools has been applied to several building conditioning and occupant comfort studies; examples of such studies are: the use of natural and hybrid ventilation, 8,9 the impact of using green envelopes, 10 assessments on energy consumption and energy efficiency 11,12 and the application of passive heating and cooling techniques. 13,14…”

Section: Introductionmentioning

confidence: 99%

A building’s thermal assessment using dynamic simulation

Rodríguez-Muñoz

Nájera-Trejo

Alarcón-Herrera

et al. 2016

Indoor and Built Environment

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A thermal analysis of a two-storey building was made using a dynamic simulation software (TRNSYS). Thermal performance of a 2000 m2 building was examined by means of several dynamic simulations. The building is located in a region within the BS climate (steppe) according to the Köppen climate classification, where both air cooling and heating are needed to provide comfortable thermal conditions through the entire year. This weather often represents an energy saving challenge, where heat gains and heat losses need to be efficiently managed. A selection of common construction and glazing materials was implemented, and a simple but effective ventilating strategy was tested. Six thermal zones were defined in the building and a comfort temperature range was established as an operating parameter. The results show hourly mean temperatures and energy consumption due to air conditioning throughout a year.

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Section: Introductionmentioning

confidence: 99%

A building’s thermal assessment using dynamic simulation

Rodríguez-Muñoz

Nájera-Trejo

Alarcón-Herrera

et al. 2016

Indoor and Built Environment

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“…George et al [4] used CFD for numerical simulation analysis of the exhaust system of buildings, so as to simulate the distribution of the flow field and temperature field, smoke pollution, and CO concentration when a building was on fire, in order to design an effective smoke exhaust system for buildings. Teixeira et al [5] used CFD in natural building ventilation planning; the natural ventilation system could effectively reduce energy consumption and provide better comfort. The abovementioned literatures show that the CFD method is regarded as an effective and convenient tool for obtaining the air flow field and temperature thermal field modes from computer numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Application of CFD to Building Thermal Control Analysis

Chang

Kuan

2012

AMM

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Building-integrated photovoltaic system is to import a photovoltaic panel system into the shell structure of a building by using building design techniques, so that the system constituents not only generate power, but are also a part of the building’s shell. If the photovoltaic panel is integrated with a sun shield, a power benefit could be obtained and both solar irradiation and the cooling load could be reduced. This study aimed to use CFD technology for analysis of building surface thermal control and flow field simulation, and further discuss the effects of the relative position of the sun and atmospheric wind flow field on the distribution of building surface temperatures and flow fields at different hours and in different seasons. Understanding the sun's position and other climatic conditions accurately is helpful for locating solar panels and solar collectors on buildings.

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“…Its flexibility and cost effectiveness makes the CFD software a very powerful tool in the engineering research field." (Teixeira, et al, 2012).…”

Section: Computational Fluid Dynamics (Cfd)mentioning

confidence: 99%

Urban Form and Passive Design for High Performance Buildings in the Christchurch Rebuild

Creswell-Wells¹

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<p>“One of the most basic and fundamental questions in urban master planning and building regulations is ‘how to secure common access to sun, light and fresh air?” (Stromann-Andersen & Sattrup, 2011). Daylighting and natural ventilation can have significant benefits in office buildings. Both of these ‘passive’ strategies have been found to reduce artificial lighting and air-conditioning energy consumption by as much as 80% (Ministry for the Environment, 2008); (Brager, et al., 2007). Access to daylight and fresh air can also be credited with improved occupant comfort and health, which can lead to a reduction of employee absenteeism and an increase of productivity (Sustainability Victoria, 2008). In the rebuild of Christchurch central city, following the earthquakes of 2010 and 2011, Cantabrians have expressed a desire for a low-rise, sustainable city, with open spaces and high performance buildings (Christchurch City Council, 2011). With over 80% of the central city being demolished, a unique opportunity to readdress urban form and create a city that provides all buildings with access to daylight and fresh air exists. But a major barrier to wide-spread adoption of passive buildings in New Zealand is their dependence on void space to deliver daylight and fresh air – void space which could otherwise be valuable built floor space. Currently, urban planning regulations in Christchurch prioritize density, allowing and even encouraging low performance compact buildings. Considering this issue of density, this thesis aimed to determine which urban form and building design changes would have the greatest effect on building performance in Central City Christchurch. The research proposed and parametrically tested modifications of the current compact urban form model, as well as passive building design elements. Proposed changes were assessed in three areas: energy consumption, indoor comfort and density. Three computer programs were used: EnergyPlus was the primary tool, simulating energy consumption and thermal comfort. Radiance/Daysim was used to provide robust daylighting calculations and analysis. UrbaWind enabled detailed consideration of the urban wind environment for reliable natural ventilation predictions. Results found that, through a porous urban form and utilization of daylight and fresh air via simple windows, energy consumption could be reduced as much as 50% in buildings. With automatic modulation of windows and lighting, thermal and visual comfort could be maintained naturally for the majority of the occupied year. Separation of buildings by as little as 2m enabled significant energy improvements while having only minimal impact on individual property and city densities. Findings indicated that with minor alterations to current urban planning laws, all buildings could have common access to daylight and fresh air, enabling them to operate naturally, increasing energy efficiency and resilience.</p>

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Application of CFD Tools to Optimize Natural Building Ventilation Design

Cited by 5 publications

References 13 publications

A building’s thermal assessment using dynamic simulation

A building’s thermal assessment using dynamic simulation

Application of CFD to Building Thermal Control Analysis

Urban Form and Passive Design for High Performance Buildings in the Christchurch Rebuild

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