CFD simulation of airflows and ammonia emissions in a pig compartment with underfloor air distribution system: Model validation at different ventilation rates

Tabase, Raphael Kubeba; linden, Veerle Van; Bağcı, Özer; Paepe, Michel De; Aarnink, A.J.A.; Demeyer, Peter

doi:10.1016/j.compag.2020.105297

Cited by 29 publications

(7 citation statements)

References 40 publications

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“…On the other hand, various systems have been proposed to reduce NH 3 emissions from livestock farms [2]. Several relevant aspects of these measures were investigated in early studies, such as the theoretical effectiveness on emission reductions [3][4][5], energy use efficiency [6,7], and economic impact to the farms [8]. However, information on the NH 3 reduction efficiency of these systems in practice is still limited due to insufficient or unreliable monitoring.…”

Section: Introductionmentioning

confidence: 99%

Validation of Five Gas Analysers for Application in Ammonia Emission Measurements at Livestock Houses According to the VERA Test Protocol

Zhuang¹,

Brusselman²,

Sonck

et al. 2020

Applied Sciences

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Ammonia emissions are an important issue in livestock production. Many mitigation measures have been proposed in order to reduce the environmental impact of livestock farms, and reliable field measurements are required to evaluate the amount of released or reduced ammonia while applying these measures. Following the guideline of the Verification of Environmental Technologies for Agricultural Production test protocol, five commercially available gas analysers, i.e., INNOVA 1314, Picarro G2103, Rosemount CT5100, Gasmet CX4000, and Axetris LGD F200-A, were validated as alternative methods to the wet-chemistry method (reference method) for measuring ammonia in livestock houses. High correlations ( r > 0.99 ) were found between the analysers and the reference method. The measurement errors of the tested analysers were below 2 ppmv or 10%. Equivalence to the wet-chemistry method was demonstrated for the INNOVA and Rosemount analysers without a recalibration and for the Picarro and Axetris analysers with a recalibration. The Gasmet analyser was seemingly subjected to an interference from carbon-dioxide and, after compensating for the cross-sensitivity, the equivalence to the wet-chemistry method could also be demonstrated. Calibration curves that were based on a certified gas cylinder were inconsistent with that based on wet-chemistry measurements, which suggested that field calibration might be necessary for optimal measurement accuracy.

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Section: Introductionmentioning

confidence: 99%

Validation of Five Gas Analysers for Application in Ammonia Emission Measurements at Livestock Houses According to the VERA Test Protocol

Zhuang¹,

Brusselman²,

Sonck

et al. 2020

Applied Sciences

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“…Adding baffles or ceiling deflectors in the tunnel ventilated barn is also encouraged to attempt because baffles or deflectors could induce the fresh air from headspace into AOZ and increase the local air exchange rate [14,27]. Besides, different ventilation systems with better air distribution performance, such as underfloor ventilation systems [28] and fiber duct air ventilation systems [8], could also be considered.…”

Section: Thermal Conditions In Mfpbsmentioning

confidence: 99%

Effect of Fans’ Placement on the Indoor Thermal Environment of Typical Tunnel-Ventilated Multi-Floor Pig Buildings Using Numerical Simulation

Wang

Cao

et al. 2022

Agriculture

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An increasing number of large pig farms are being built in multi-floor pig buildings (MFPBs) in China. Currently, the ventilation system of MFPB varies greatly and lacks common standards. This work aims to compare the ventilation performance of three popular MFPB types with different placement of fans using the Computational Fluid Dynamics (CFD) technique. After being validated with field-measured data, the CFD models were extended to simulate the air velocity, air temperature, humidity, and effective temperature of the three MFPBs. The simulation results showed that the ventilation rate of the building with outflowing openings in the endwall and fans installed on the top of the shaft was approximately 25% less than the two buildings with fans installed on each floor. The ventilation rate of each floor increased from the first to the top floor for both buildings with a shaft, while no significant difference was observed in the building without a shaft. Increasing the shaft’s width could mitigate the variation in the ventilation rate of each floor. The effective temperature distribution at the animal level was consistent with the air velocity distribution. Therefore, in terms of the indoor environmental condition, the fans were recommended to be installed separately on each floor.

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“…De acordo com Tabase et al (2020), o uso de sistemas subterrâneos de distribuição de ar em instalações para suínos possibilita o fornecimento eficiente de ar resfriado e melhora a qualidade do ar, quando comparado com o fornecimento de ventilação via dutos instalados na parte superior da instalação. Neste sistema, o ar entra no interior da instalação por meio de dutos localizados na região do piso e sai por meio de aberturas de exaustão localizadas no teto, permitindo que o excesso de calor seja deslocado para a parte superior, e possibilitando que o consumo energético seja reduzido em até 36%, quando comparado com sistemas de ventilação de entrada difusa.…”

Section: Concepções Construtivasunclassified

Implantação da biomimética como processo de otimização das estruturas para produção animal

Maciel

Oliveira

Silva

et al. 2021

RSD

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O estudo teórico das aplicações da Biomimética nas construções e no desenvolvimento de soluções reúne métodos, conceitos e exemplos de aplicações que podem despertar a criatividade e, ao mesmo tempo, o pensamento crítico a respeito do resgate do equilíbrio entre a ação humana e a natureza. A inspiração da Biomimética pode conscientizar sobre a necessidade de adotarem-se novas tecnologias, padrões e critérios de sobrevivência, considerando o equilíbrio ambiental. Neste sentido, o objetivo deste estudo é descrever a utilização da Biomimética como agente promissor de ideias sustentáveis às problemáticas identificadas na área de ambiência na produção animal. Com uma análise sistemática da literatura, são apresentadas propostas de soluções já utilizadas/projetadas para resolver problemas existentes, por meio de analogias com sistemas naturais. Desta forma, são apontadas tecnologias menos difundidas ou em fase de pesquisa, como construções rápidas e portáteis, estruturas que favoreçam a melhoria do conforto térmico e acústico, tratamento da água e esgoto, e consumo de energia renovável. Todas estas tecnologias são promissoras no processo de otimização de estruturas para a produção animal.

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CFD simulation of airflows and ammonia emissions in a pig compartment with underfloor air distribution system: Model validation at different ventilation rates

Cited by 29 publications

References 40 publications

Validation of Five Gas Analysers for Application in Ammonia Emission Measurements at Livestock Houses According to the VERA Test Protocol

Validation of Five Gas Analysers for Application in Ammonia Emission Measurements at Livestock Houses According to the VERA Test Protocol

Effect of Fans’ Placement on the Indoor Thermal Environment of Typical Tunnel-Ventilated Multi-Floor Pig Buildings Using Numerical Simulation

Implantação da biomimética como processo de otimização das estruturas para produção animal

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