Computational Analysis of Natural Ventilation Flows in Geodesic Dome Building in Hot Climates

Soleimani, Zohreh; Calautit, John Kaiser; Hughes, Ben Richard

doi:10.3390/computation4030031

Cited by 22 publications

(24 citation statements)

References 27 publications

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“…In certain cases, they found that wind flow direction and speed are not essential in decreasing room temperature of the domed roofs. Soleimani et al (2016) conducted a computational simulation of the wind-induced ventilation in a geodesic dome in a hot climate. They reported that natural ventilation by upper roof openings can reduce the indoor air temperature during winter periods.…”

Section: Review Of Vaulted and Domed Roofsmentioning

confidence: 99%

Parametric investigation of traditional vaulted roofs in hot-arid climates

2019

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In the Mediterranean and North African regions, traditional vaulted roof forms have been widely used due to their significant influence on enhancing thermal indoor conditions. This research parametrically investigates the thermal performance of vaulted roofs, seeking a better understanding of the reciprocal relationship between the solar irradiance received by these roofs and the resulting energy consumption in the hot-arid city of Aswan (23.58 o N), Egypt. The methodological procedure is realized through two phases. The annual simulations of solar irradiance and energy consumption are carried out in the first phase, where the quantitative performance of 2,310 different cases are predicted in terms of six vaulted roof forms against eleven key influencing variables. The unsupervised technique of Principal Component Analysis is used in the second phase to reduce the higher dimensionality of the resulting dataset and extract important information from newly established orthogonal principal components. The outcomes of this work aim to provide architects and practitioners with an optimized dataset to use in the design and application of vaulted roof forms and support decision makers addressing the development strategies by providing essential data for setting regulations of newly built environments in harsh hot-arid contexts.

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Section: Review Of Vaulted and Domed Roofsmentioning

confidence: 99%

Parametric investigation of traditional vaulted roofs in hot-arid climates

2019

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“…Reasonable air distribution is a necessary guarantee for effective ventilation (Etheridge 2011). The uniformity of indoor airflow field can reduce internal vortices and improve ventilation performance (Soleimani et al 2016). On the other hand, evaluation indicators of effective ventilation for the LSCCSD, with the particular annular opening, should be specially considered.…”

Section: Introductionmentioning

confidence: 99%

“…The wind tunnel validation of Norton et al (2009) is based on the same 1/2 scale model parameters as the wind tunnel test, and then extended to full-scale CFD for calculation and simulation. For dome building, Soleimani et al (2016) carried out CFD validation by the wind tunnel test of Rahmatmand et al (2014) on the external flow field, and further extended to study internal and external flow field. The calculation results of Evola and Popov (2006) showed that the ventilation deviation between CFD and wind tunnel test is reasonable, and the internal air distribution is well demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Optimization Design on Ventilation Openings of Super Large Circular Coal Storage Dome

Zhou

Chen

Hou

et al. 2020

Environmental Science and Engineering

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Large space circular coal storage dome (LSCCSD) offers an environmental and dependable alternative to open stockpiles, and it has been consequently widely applied in China. However, due to the lack of scientific guidelines, its natural ventilation performance is lower than expected.Natural ventilation potential strongly depends on the roof geometry and opening mode, whichhave not yet been investigated for LSCCSD. This paper presents a detailed evaluation of the impact of dome geometry, i.e., rise span ratio, and opening modes on the ventilation performance of LSCCSD. The evaluation is based on computational fluid dynamics (CFD) methods and is validated by available wind tunnel testing. We employed three evaluation indicators, which are wind pressure coefficient, effective ventilation rate, and wind speed ratio.The results demonstrate that the rise span ratio has a significant effect on the wind pressure difference and ventilation flow, and the annular opening should be set in a strong positive pressure zone. For cases of a single-annular opening, the effective ventilation rate increases by 9%-42%. For cases of double-annular openings, the effective ventilation rate increases by 100% and average wind speed ratio increases by 50% compared with that of a single one. The optimum natural ventilation performance for LSCCSD is achieved at a rise span ratio of 0.37. In addition, the lateral middle opening is kept higher than the ridge top of the coal pile. The proposed evaluation approach and design parameters provided instructive information in the building design and ventilation control for LSCCSDs.

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“…The building sector is one of the most energy consuming sectors, and it is responsible for about the 30%-40% of the world's total energy consumption. The utilization of alternative and renewable energy sources in the building sector is a critical issue which has to be delivered in order to achieve sustainability [1]. Solar energy exploitation is an important weapon for reducing electricity and fossil fuel utilization in the building sector [2].…”

Section: Introductionmentioning

confidence: 99%

Thermal Behavior of a Building with Incorporated Phase Change Materials in the South and the North Wall

et al. 2018

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Energy consumption in the building sector is responsible for a very large amount of electricity consumption worldwide. The reduction of this consumption is a crucial issue in order to achieve sustainability. The objective of this work is to investigate the use of phase change materials (PCMs) in the building walls in order to reduce the heating and the cooling loads. The novelty of this work is based on the investigation of different scenarios about the position of the PCM layer in the south and the north walls. PCMs can improve the thermal performance and the thermal comfort of a building due to their ability to store large amounts of thermal energy in latent form and so to reduce the temperature fluctuations of the structural components, keeping them within the desired temperature levels. More specifically, this work presents and compares the heating loads, the cooling loads and the temperature distribution of a building in Athens (Greece), with and without PCMs in different positions in the south wall and in the north walls. The simulation is performed with the commercial software TRNSYS 17, using the TRNSYS component: type 1270 (PCM Wall). The results proved that the maximum energy savings per year were achieved by the combination of the insulation and the PCM layer in the north and south walls. More specifically, the reductions in the heating and the cooling loads were found to be 1.54% and 5.90%, respectively. Furthermore, the temperature distribution with the use of a PCM layer is the most acceptable, especially during the summer period.

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Computational Analysis of Natural Ventilation Flows in Geodesic Dome Building in Hot Climates

Cited by 22 publications

References 27 publications

Parametric investigation of traditional vaulted roofs in hot-arid climates

Parametric investigation of traditional vaulted roofs in hot-arid climates

Optimization Design on Ventilation Openings of Super Large Circular Coal Storage Dome

Thermal Behavior of a Building with Incorporated Phase Change Materials in the South and the North Wall

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