Assessment of Sidewall and Roof Vents Opening Configurations to Improve Airflow Inside Greenhouses

Gil, Rodrigo; Bojacá, Carlos Ricardo; Casilimas, Héctor Albeiro; Schrevens, Eddie; Suay, Ricardo Muñoz

doi:10.17660/actahortic.2012.952.16

Cited by 4 publications

(8 citation statements)

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“…A main characteristic of the greenhouse structures used in Colombia is that they are low cost with a low technological level, where microclimate conditions are usually not optimal for the growth and development of plants in some specific hours, both during the day and at night [76,77]. Therefore, in the last decade, research has been developed implementing the use of CFD, with the objective to design structures where natural ventilation is optimized and a better microclimate behavior is obtained [17,78,79]. The above has made it possible to obtain a couple of passive greenhouse structure designs adapted to the climatic conditions of the high Andean tropics, a region where 90% of the country's production under cover is concentrated [29].…”

Section: Scientific Production By Countrymentioning

confidence: 99%

“…day and at night [76,77]. Therefore, in the last decade, research has been developed implementing the use of CFD, with the objective to design structures where natural ventilation is optimized and a better microclimate behavior is obtained [17,78,79]. The above has made it possible to obtain a couple of passive greenhouse structure designs adapted to the climatic conditions of the high Andean tropics, a region where 90% of the country's production under cover is concentrated [29].…”

Section: Scientific Production By Countrymentioning

confidence: 99%

“…In the last decade, several authors have analyzed different types of existing greenhouses for agricultural production, reaching the almost generalized conclusion regarding the geometry of the structure and its strong influence on the behavior of the microclimate [17,76,78,110]. In general terms, it has been observed that the air flow movement will present different velocities depending on the shape of the roof [110].…”

Section: Frequently Cited Documentsmentioning

confidence: 99%

“…It is also important to mention that regardless of the type of numerical grid implemented, it will always be necessary to determine the quality of the numerical grid, its size, and the independence of the solution to the size of the numerical grid [79,187]. In general, preprocessing software has within its interface the option to quantify the quality of the numerical grid under some indexes created for this purpose, such as asymmetry, aspect ratio, and cell skewness [78]. For the definition of the solution independence to the size of the numerical grid, it is advisable to perform sensitivity analyses to find the appropriate size that guarantees a high accuracy of the solution at the lowest possible computational cost [95,99,187].…”

Section: Type Of Numerical Grid Implementedmentioning

confidence: 99%

“…Simplified method 62 [19,32,[37][38][39]46,49,76,78,83,91,95,99,100,106,[108][109][110][111][113][114][115][116][120][121][122][123]126,129,131,133,136,[141][142][143][144][145][146][147][148][149]151,[153][154][155][156][159][160][161][163][164]…”

Section: Radiation Model Number Of Documents Referenceunclassified

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Research on the Microclimate of Protected Agriculture Structures Using Numerical Simulation Tools: A Technical and Bibliometric Analysis as a Contribution to the Sustainability of Under-Cover Cropping in Tropical and Subtropical Countries

2021

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The use of protected agriculture structures in tropical and subtropical countries is the main alternative for intensification of agricultural production selected by producers. In general, in these regions, passive and plastic-covered structures predominate, with natural ventilation as the only method of climate control. This phenomenon has been widely studied in different types of structures using computational fluid dynamics (CFD) simulation. Therefore, this review aimed to collect and analyze the publications generated in this field of knowledge between 2010 and 2020. The search for information included the main academic databases available on the web and the analysis was carried out using bibliometric techniques, from which it was possible to identify details inherent to the scientific production, such as countries of origin, main authors, journals, and citations. Likewise, a detailed breakdown of the relevant technical information of the three phases of numerical simulation, such as preprocessing, processing, and postprocessing, was carried out. A compilation of 118 papers published in 65 journals, written by 256 authors, originating from 24 countries was achieved, where it was evident that Mexico and Colombia were the countries with the highest scientific production in the last decade. These papers analyzed, together, a total of 17 different types of structures where polyethylene-covered greenhouses predominated, with steady state simulations, for daytime climate conditions and without the presence of crops. Within the current and future research trends, the predominance of studies analyzing passive climate control methods, new models of insect-proof mesh-house structures, and, finally, studies focused on the structural analysis of greenhouses was found.

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Section: Scientific Production By Countrymentioning

confidence: 99%

Section: Scientific Production By Countrymentioning

confidence: 99%

Section: Frequently Cited Documentsmentioning

confidence: 99%

Section: Type Of Numerical Grid Implementedmentioning

confidence: 99%

Section: Radiation Model Number Of Documents Referenceunclassified

See 3 more Smart Citations

Research on the Microclimate of Protected Agriculture Structures Using Numerical Simulation Tools: A Technical and Bibliometric Analysis as a Contribution to the Sustainability of Under-Cover Cropping in Tropical and Subtropical Countries

2021

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Calibration and Implementation of a Dynamic Energy Balance Model to Estimate the Temperature in a Plastic-Covered Colombian Greenhouse

Ortiz,

Chamorro,

Acuña-Caita

et al. 2023

AgriEngineering

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Modeling and simulation have become fundamental tools for the microclimatic analysis of greenhouses under various climatic conditions. These models allow precise control of the climate inside the structures and the optimization of their performance under any situation. In Colombia, the availability of energy balance models adapted to local greenhouses and their climate is limited, which affects the decision-making of both technical advisors and growers. This study focused on calibrating and evaluating a dynamic energy balance model to predict the thermal behavior of an innovative type of plastic-covered greenhouse designed for the Bogotá savanna. The selected model considers fundamental heat and mass transfer processes, incorporating parameters that depend on the architecture of the structure and local climatic conditions, making it suitable for protected agriculture in Colombia. The results of the post-calibration evaluation showed that the model is highly accurate, with a temperature prediction efficiency close to 86%. This ensures that the model can accurately predict the thermal behavior of the greenhouse being evaluated. It is important to note that the model can also anticipate phenomena characteristics of Colombian greenhouses, such as thermal inversion. This advance has become a valuable tool for decision-making in protected agriculture in the region.

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Influence of the Height in a Colombian Multi-Tunnel Greenhouse on Natural Ventilation and Thermal Behavior: Modeling Approach

Villagrán

Flores²,

Akrami

et al. 2021

Sustainability

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The dimensions of a passive greenhouse are one of the decisions made by producers or builders based on characteristics of the available land and the economic cost of building the structure per unit of covered area. In few cases, the design criteria are reviewed and the dimensions are established based on the type of crop and local climate conditions. One of the dimensions that is generally exposed to greater manipulation is the height above the gutter and the general height of the structure, since a greenhouse with a lower height has a lower economic cost. This has led some countries in the tropical region to build greenhouses that, due to their architectural characteristics, have inadequate microclimatic conditions for agricultural production. The objective of this study was to analyze the effect on air flows and thermal distribution generated by the increase of the height over gutter of a Colombian multi-tunnel greenhouse using a successfully two-dimensional computational fluid dynamics (CFD) model. The simulated numerical results showed that increasing the height of the greenhouse allows obtaining temperature reductions from 0.1 to 11.7 °C depending on the ventilation configuration used and the external wind speed. Likewise, it was identified that the combined side and roof ventilation configuration (RS) allows obtaining higher renovation indexes (RI) in values between 144 and 449% with respect to the side ventilation (S) and roof ventilation (R) configurations. Finally, the numerical results were successfully fitted within the surface regression models responses.

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Assessment of Sidewall and Roof Vents Opening Configurations to Improve Airflow Inside Greenhouses

Cited by 4 publications

References 0 publications

Research on the Microclimate of Protected Agriculture Structures Using Numerical Simulation Tools: A Technical and Bibliometric Analysis as a Contribution to the Sustainability of Under-Cover Cropping in Tropical and Subtropical Countries

Research on the Microclimate of Protected Agriculture Structures Using Numerical Simulation Tools: A Technical and Bibliometric Analysis as a Contribution to the Sustainability of Under-Cover Cropping in Tropical and Subtropical Countries

Calibration and Implementation of a Dynamic Energy Balance Model to Estimate the Temperature in a Plastic-Covered Colombian Greenhouse

Influence of the Height in a Colombian Multi-Tunnel Greenhouse on Natural Ventilation and Thermal Behavior: Modeling Approach

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