Analysis of microclimate characteristics in solar greenhouses under natural ventilation

Hou, Yicun; Li, Angui; Li, Yue; Jin, Dacheng; Tian, Yu; Zhang, Da; Wu, Dingmeng; Zhang, Linhua; Lei, Wenjun

doi:10.1007/s12273-021-0771-1

Cited by 22 publications

(16 citation statements)

References 34 publications

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“…Figure 4 shows the countries of origin of the research works, highlighting the Mediterranean region, where passive greenhouses and screenhouse structures used for intensive horticulture predominate. Also, in some regions of China, where the Chinese solar greenhouse is predominant, in recent years the phenomenon of natural ventilation and microclimatic optimization by passive methods has been investigated [74]. In terms of spatial distribution, 65 of the publications collected in this research work came from countries in the subtropical region and 53 from countries in the tropical region.…”

Section: Scientific Production By Countrymentioning

confidence: 99%

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%

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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“…In atmospheric pressure, air temperature and RH are inversely proportional, as presented in Figure 5b. The type of greenhouse strongly influences variations in air temperature and RH in the greenhouse used [21]. The air temperature inside the greenhouse should be controlled properly because an increase in air temperature before harvest can reduce fruit sweetness [22].…”

Section: Micro-climate and Soil Moisture Monitoringmentioning

confidence: 99%

Functional Design of Pocket Fertigation under Specific Microclimate and Irrigation Rates: A Preliminary Study

et al. 2022

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Irrigation and fertilization technologies need to be adapted to climate change and provided as effectively and efficiently as possible. The current study proposed pocket fertigation, an innovative new idea in providing irrigation water and fertilization by using a porous material in the form of a ring/disc inserted surrounding the plant’s roots as an irrigation emitter equipped with a “pocket”/bag for storing fertilizer. The objective was to evaluate the functional design of pocket fertigation in the specific micro-climate inside the screenhouse with a combination of emitter designs and irrigation rates. The technology was implemented on an experimental field at a lab-scale melon (Cucumis melo L.) cultivation from 23 August to 25 October 2021 in one planting season. The technology was tested at six treatments of a combination of three emitter designs and two irrigation rates. The emitter design consisted of an emitter with textile coating (PT), without coating (PW), and without emitter as a control (PC). Irrigation rates were supplied at one times the evaporation rate (E) and 1.2 times the evaporation rate (1.2E). The pocket fertigation was well implemented in a combination of emitter designs and irrigation rates (PT-E, PW-E, PT-1.2E, and PW-1.2E). The proposed technology increased the averages of fruit weight and water productivity by 6.20 and 7.88%, respectively, compared to the control (PC-E and PC-1.2E). Meanwhile, the optimum emitter design of pocket fertigation was without coating (PW). It increased by 13.36% of fruit weight and 14.71% of water productivity. Thus, pocket fertigation has good prospects in the future. For further planning, the proposed technology should be implemented at the field scale.

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“…Consequently, the interior environment of each plant must be maintained at an appropriate level [12,13]. Proper management of the greenhouse environment was closely tied to plant development to boost harvests by drastically lowering the difference in air temperature between the inside and outside [14]. Protected agriculture is used mostly to regulate parameters in the desert and tropical horticultural crops [15].…”

Section: Introductionmentioning

confidence: 99%

Using Greenhouse Modelling to Identify the Optimal Conditions for Growing Crops in Northeastern Thailand

Wangkahart¹,

Junsiri²,

Srichat³

et al. 2022

MMEP

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The most essential components in escort farming are the determination of airflow patterns and the distribution impact of microclimate temperature variables. The objective of this study is to use Computational Fluid Dynamics (CFD) models to ascertain the aerodynamic and thermal dynamics of protected agricultural greenhouses suitable for cultivation in tropical Northeastern crops of Thailand by defining differences in greenhouse layouts, specifically Gable Roof (GR), Curved Roof (CR), Saw tooth roof (SR), and Double roof (DR). The root means square error (RMSE) indicated that the factor determination of CFD modelling using the standard k−ε turbulence model was satisfactory. In addition, they found that, at a significance level of 0.05, the average temperature in the greenhouses was statistically distinct based on the form of the back of the house and the location of the air input and outflow.

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Analysis of microclimate characteristics in solar greenhouses under natural ventilation

Cited by 22 publications

References 34 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

Functional Design of Pocket Fertigation under Specific Microclimate and Irrigation Rates: A Preliminary Study

Using Greenhouse Modelling to Identify the Optimal Conditions for Growing Crops in Northeastern Thailand

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