The effect of wind speed and direction and surrounding maize on hybrid ventilation in a dairy cow building in Denmark

Rong, Li; Liu, Dezhao; Pedersen, Erling F.; Zhang, G.

doi:10.1016/j.enbuild.2014.10.016

Cited by 45 publications

(20 citation statements)

References 39 publications

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“…In recently years, the Computational Fluid Dynamics (CFD) technique has been widely used in studying ventilation systems of livestock buildings especially in USA and Northern Europe ( Bjerg et al, 2002;Norton et al, 2009;Norton et al, 2010;Bjerg et al, 2013;Rahman et al, 2014;Rong et al, 2014;Rong et al, 2015). Once a CFD model is built, different types of studies can be performed.…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics aided investigation and optimization of a tunnel-ventilated poultry house in China

Yang

Dominy

et al. 2019

Computers and Electronics in Agriculture

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Ventilation system is crucial for poultry houses to control the indoor climate and air quality. The tunnel ventilation system is widely applied for large-scale poultry buildings in China but only limited scientific researches regarding the flow pattern, temperature distribution and design criteria are available in the literature. Thanks to the fast development of computer technology, Computational Fluid Dynamics (CFD) techniques were used in present study to investigate the indoor air movement, air temperature and relatively humidity. A three-dimensional CFD model was built according to the real dimensions of a laying hen house and the model was validated by comparing the simulation results with the field measurements at 30 positions. Meanwhile, statistical analysis was performed to determine the differences between different boundary conditions regarding the agreement between measured and CFD simulated results. Optimization of air inlet configurations was performed by using the validated CFD model and it was found that the uniformity of indoor air movement could prevent excessive local convective heat losses and reduce the temperature at the end of the house. Furthermore, the air inlets placed at the middle of the side wall could significantly reduce the high temperature expected at the end of the building without using extra energy, which is especially important for large-scale poultry farms with long buildings.The performance of side-wall windows was also examined and preliminary guidance was provided to effectively regulate the indoor climate by using these windows with the help of environmental monitoring systems. The present study contributes to the understanding and design of the tunnel ventilation system used in poultry houses.

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Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics aided investigation and optimization of a tunnel-ventilated poultry house in China

Yang

Dominy

et al. 2019

Computers and Electronics in Agriculture

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“…This is confirmed by the analysis presented in (Yang and Li 2015) for high buildings, and (Turner and Awbi 2015) where the authors have noticed the influence of wind parameters; however, it was not the basis of the analysis carried out by them. In the article (Rong et al 2015), the authors also agreed on the need to take into account the effect of wind on the ventilation system, but their analysis is not related to residential buildings.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the impact of the parameters of outside air on the condition of indoor air

Zender–Świercz

2017

Int. J. Environ. Sci. Technol.

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The article presents the impact of external conditions on the parameters of the air inside the flats and hybrid ventilation. In the vast majority of existing multifamily buildings, as well as in many newly built ones, the way of air exchange is natural ventilation. The air exchange in this system is the result of the temperature difference in the outside of the building and in the ventilation duct as well as the pressure difference caused by the wind. The way to strengthen the exchange of indoor air is to use the hybrid ventilation by using a fan to assist natural air flow in the ''no wind'' periods. When designing the natural ventilation installation, the extreme conditions outside the building are assumed, not including air parameters changing. This article attempts to identify the conditions of atmospheric air which cause the disturbances of exchange indoor air and it attempts to decide when a fan should work to assist natural ventilation.

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“…In addition, it is time consuming method compared to small scale [139] and [140]. On the other hand, small scale is more economical in the long run and efficient as well as independent from outdoor environment which means the conditions (such as wind speed or direction) can be easily controlled [141]. However, the similarity between small scale and real scale model has been a challenging matter for researchers [142].…”

Section: Earth To Air Heat Exchangers (Eahe)mentioning

confidence: 99%

“…Analytical models include basic physics equations for heat transfer and fluid dynamics. Therefore, it cannot be expected that it has the detailed prediction of fluid behaviour for windcatcher but they are useful tools for a general understanding and fast estimation of windcatcher performance [141]. It is found that the contributions of the analytical models to the windcatcher studies are minimal, but rather CFD has occupied this position due to increasing computing power and flexibility of CFD software in recent years.…”

Section: Earth To Air Heat Exchangers (Eahe)mentioning

confidence: 99%

A review on windcatcher for passive cooling and natural ventilation in buildings, Part 1: Indoor air quality and thermal comfort assessment

Jomehzadeh

Nejat

Calautit

et al. 2017

Renewable and Sustainable Energy Reviews

168

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The effect of wind speed and direction and surrounding maize on hybrid ventilation in a dairy cow building in Denmark

Cited by 45 publications

References 39 publications

Computational Fluid Dynamics aided investigation and optimization of a tunnel-ventilated poultry house in China

Computational Fluid Dynamics aided investigation and optimization of a tunnel-ventilated poultry house in China

Analysis of the impact of the parameters of outside air on the condition of indoor air

A review on windcatcher for passive cooling and natural ventilation in buildings, Part 1: Indoor air quality and thermal comfort assessment

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