Control of greenhouse-air energy and vapor pressure deficit with heating, variable fogging rates and variable vent configurations: Simulated effectiveness under varied outside climates

Villarreal‐Guerrero, Federico; Pinedo-Álvarez, Alfredo; Flores-Velázquez, Jorge

doi:10.1016/j.compag.2020.105515

Cited by 18 publications

(6 citation statements)

References 26 publications

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“…An example of the monitoring and control system is presented in [17,18]. The collected data can be processed using hybrid AI methods [19] or by applying mathematical models [20]. With the usage of the monitoring and control system, a zero-energy footprint can be achieved.…”

Section: Sensorsmentioning

confidence: 99%

Developing a Modern Greenhouse Scientific Research Facility—A Case Study

Cafuta

Dodig

Cesar

et al. 2021

Sensors

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Multidisciplinary approaches in science are still rare, especially in completely different fields such as agronomy science and computer science. We aim to create a state-of-the-art floating ebb and flow system greenhouse that can be used in future scientific experiments. The objective is to create a self-sufficient greenhouse with sensors, cloud connectivity, and artificial intelligence for real-time data processing and decision making. We investigated various approaches and proposed an optimal solution that can be used in much future research on plant growth in floating ebb and flow systems. A novel microclimate pocket-detection solution is proposed using an automatically guided suspended platform sensor system. Furthermore, we propose a methodology for replacing sensor data knowledge with artificial intelligence for plant health estimation. Plant health estimation allows longer ebb periods and increases the nutrient level in the final product. With intelligent design and the use of artificial intelligence algorithms, we will reduce the cost of plant research and increase the usability and reliability of research data. Thus, our newly developed greenhouse would be more suitable for plant growth research and production.

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Section: Sensorsmentioning

confidence: 99%

Developing a Modern Greenhouse Scientific Research Facility—A Case Study

Cafuta

Dodig

Cesar

et al. 2021

Sensors

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“…As a closed system, it is highly airtight with minimum ventilation and high CO 2 utilization efficiency for plant growth ( Kozai, 2019 ). Environmental regulation is essential for plant factories, and has a notable impact on plant quality, yield, and production costs ( Li et al, 2012 ; Villarreal-Guerrero, Pinedo-Alvarez & Flores-Velázquez, 2020 ). Importantly, among the many environmental regulations, humidity management is critical for optimal plant growth and development in plant factory.…”

Section: Introductionmentioning

confidence: 99%

High relative humidity improves leaf burn resistance in flowering Chinese cabbage seedlings cultured in a closed plant factory

Kang

Qin

et al. 2022

PeerJ

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Plant factories that ensure the annual production of vegetable crops have sparked much attention. In the present study, thirty types of common vegetable crops from 25 species and eight families, were grown in a multi-layer hydroponic system in a closed-type plant factory to evaluate the adaptive performance. A total of 20 vegetable crops, belonging to 14 species and 4 families, unexpectedly exhibited different degrees of leaf margin necrosis in lower leaves firstly, then the upper leaves gradually. We defined this new physiological disorder as “leaf burn”. It occurred more commonly and severely in cruciferous leafy vegetables. Two different light intensities (150 and 105 µmol m−2 s−1 photosynthetic photon flux density (PPFD)), three photoperiod conditions (12, 10 and 8 h d−1) and two canopy relative air humidity (RH) (70% and 90% RH) were set to evaluate the suppression effects on leaf burn occurrence in two commercial flowering Chinese cabbage cultivars (‘Sijiu’ and ‘Chixin’), the special cruciferous vegetable in South China. We discovered that changing light conditions did not fully suppress leaf burn occurrence in the cultivar ‘Sijiu’, though lower light intensity and shorter photoperiod partly did. Interestingly, the occurrence of leaf burn was completely restrained by an increased canopy RH from 70% to 90%. Specifically, the low RH-treated seedlings occurred varying degree of leaf burn symptoms, along with rapidly decreased water potential in leaves, while the high RH treatment significantly lessened the drop in leaf water potential, together with increased photosynthetic pigment contents, net photosynthetic rate, stomatal conductance and transpiration rate, decreased leaf stomatal aperture and density, and thus reduced the incidence of leaf burn in ‘Sijiu’ and ‘Chixin’, from 28.89% and 18.52% to zero, respectively. Taken together, high canopy RH may favor maintaining leaf water potential and improving photosynthesis performance, jointly regulating leaf burn incidence and plant growth.

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“…In any case, reduction in the energy requirement is related to the strategic choices of the growers in relation to the structure of the greenhouse and climate control equipment used, such as ventilation systems, cooling and heating and cultivation practices. For example, Villarreal-Guerrero et al [14] suggested that maintaining high transpiration (higher leaf area index) during summer is an efficient method for cooling a greenhouse, as the majority of the water absorbed by the plant can be returned as vapor to the greenhouse air and cool the environment. In another case, Kittas et al [13] suggested that maintaining low transpiration rates during winter can have positive effects on the energy efficiency of the greenhouse, as less water is released into the greenhouse air and less energy is required for humidity control.…”

Section: Introductionmentioning

confidence: 99%

“…Flexible climate control system cases are frequency drive (VFD) controllers. These may be used as energy-saving tools [14].…”

mentioning

confidence: 99%

Energy and Water Related Parameters in Tomato and Cucumber Greenhouse Crops in Semiarid Mediterranean Regions. A Review, Part I: Increasing Energy Efficiency

et al. 2021

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Countries located in the Mediterranean region share many common features in terms of agricultural sustainability and economic realities of modern farming, as they are affected by water scarcity, energy use and climate suitability. Greenhouses are considered as a mitigation measure to combat climate change and as a sustainable production system. The majority of greenhouses in the Mediterranean region are rudimentary, while those in Central and North Europe are characterized by equipment of a high technological level for greenhouse climate and fertigation management. However, the technological innovations and research originating from Central and North Europe glasshouses may not be appropriate for use in Mediterranean plastic greenhouses when considering the trade-off between agronomic needs and potential energy savings. Identifying energy measures suitable for the local climate will improve energy efficiency and crop performance toward the goal of greenhouse sustainability. This review mainly focuses on renewable and energy-efficient control systems in Mediterranean greenhouses, where crops such as tomato and cucumber are widely grown.

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Control of greenhouse-air energy and vapor pressure deficit with heating, variable fogging rates and variable vent configurations: Simulated effectiveness under varied outside climates

Cited by 18 publications

References 26 publications

Developing a Modern Greenhouse Scientific Research Facility—A Case Study

Developing a Modern Greenhouse Scientific Research Facility—A Case Study

High relative humidity improves leaf burn resistance in flowering Chinese cabbage seedlings cultured in a closed plant factory

Energy and Water Related Parameters in Tomato and Cucumber Greenhouse Crops in Semiarid Mediterranean Regions. A Review, Part I: Increasing Energy Efficiency

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