Development and Validation of Inner Environment Prediction Model for Glass Greenhouse using CFD

Jeong, In Seon; Lee, Chung Geon; Cho, La Hoon; Park, Sun Yong; Kim, Min Jun; Kim, Seok Jun; Kim, Dae Hyun

doi:10.12791/ksbec.2020.29.3.285

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…The original idea of planting a greenhouse is to keep the earth's surface warm. From the early simple film mulching to the plastic greenhouse [23], arched shed [24], glass greenhouse [25], ordinary solar greenhouse, sunshade momentum, single solar greenhouse [26], multi-span greenhouse [27], to largescale intelligent solar greenhouse, although the form of greenhouse has changed a lot, its essence limited by land, sunlight and climate conditions has not changed. The stability and service life of greenhouse construction cannot meet modern building standards.…”

Section: Development Trend Of Greenhousementioning

confidence: 99%

Research on intelligent building greenhouse plant factory and “3-Positions and 1-Entity” development mode

Wang

Зубко

Onychko

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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After continuous development and evolution, the plant growth greenhouse has developed from the original heat preservation and moisture film cover to the present multi-cross intelligent solar greenhouse, which has played an important social value in agricultural production. However, in terms of the form of the greenhouse, it has not kept pace with the pace of social development, far from meeting the needs of environmental protection, energy saving, stable, intelligent, long-term use. With the wide application of big data, artificial intelligence, block chain, Internet of Things, cloud computing and other intelligent technologies in agriculture, as well as the rapid development of soilless culture and artificial light of plant lighting technology, the intelligent building greenhouse based on modern building technology can not only completely get rid of geographical location and regional climate conditions, but also durable to achieve long-term use standards and facilitate the deployment of intelligent operation equipment, which will become a more advanced and high-end form of intelligent plant greenhouse. Therefore, this paper defines the concept of “building greenhouse” for the first time, preliminarily discusses the construction idea of “intelligent building greenhouse plant factory”, and puts forward the suggestion of “trinity” new development mode, in order to play a pioneer role. With the proposal of “intelligent building greenhouse plant factory”, we firmly believe that the intelligent building greenhouse plant factory will gradually gain social recognition and get rapid development under the promotion of the “trinity” development mode. It can be predicted that skyscrapers style “Intelligent building greenhouse plant factory” will be everywhere in the foreseeable future, no matter in the heart of the city and other extreme weather conditions desert, ruin. In the future, people living near plant factories will be able to breathe oxygen-rich air, eat clean vegetables from nearby plant factories, and enjoy a high-quality and healthy life brought by abundant fresh plant food. What’s more, the intelligent building greenhouse plant factory can better the environment of our earth to a certain extent, improve its carrying capacity, alleviate the food panic caused by outbreaks or disasters, local unrest to consolidate food security, intensive and efficient use of cultivated land resources, and rich people’s pursuit of healthy plant food raw materials.

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Section: Development Trend Of Greenhousementioning

confidence: 99%

Research on intelligent building greenhouse plant factory and “3-Positions and 1-Entity” development mode

Wang

Зубко

Onychko

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…A computational fluid dynamics (CFD) simulation can effectively avoid the limitations of theoretical calculation methods in complex practical engineering and is usually employed in the design stage for conceptual study. In recent years, with the development of CFD technology, it is widely used in greenhouse internal environment simulation [9][10][11][12][13][14]. Gurpreet Singh et al [15] established a mathematical model of the greenhouse microclimate, including four component equations of cover, inside air, canopy surface, and bare soil surface, and successfully predicted the change in indoor air temperature and humidity.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation Study on the Cooling Characteristics of Shading and Natural Ventilation in Greenhouse of a Botanical Garden in Shanghai

Shi

Wang

Wang³

2023

Sustainability

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Botanical garden greenhouses typically use solar radiation as an important heat source and meanwhile provide light for plants to survive. However, in the summertime, when the solar radiation is too strong, overheating will occur in the greenhouse and natural ventilation assisted with shading is used to cool it down. The modulation strategy of shading is very important not only to indoor temperature but also to the growth of plants. In order to determine the control strategy of the shading area in the design and installation stage, a CFD model of an exhibition greenhouse in Shanghai is established. During summer conditions, under the worst-case scenario of a windless day, the minimum shading area needed under different outdoor comprehensive temperatures is studied, and the correlation curve is fitted to guide the control of the shading to maintain appropriate thermal conditions. The decrease in indoor temperature under different shading areas is also explored when the outdoor comprehensive temperature is 34 °C. The annual carbon emission reduction of the greenhouse is about 500 t CO2, by adopting shading and natural ventilation. This study provides a reference value for shading control and energy saving and emission reduction of a botanical garden greenhouse.

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“…Some researchers begin to use CFD technology to design greenhouse environmental control scheme ). CFD prediction model for the inner environment of glass greenhouse is developed and validated (Jeong et al, 2020). A control method of greenhouse temperature uniformity based on CFD is proposed (Li et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Event-triggered control for greenhouse temperature under natural ventilation based on computational fluid dynamics

Sun

Yang

Liu

et al. 2020

Systems Science & Control Engineering

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In this paper, the event-triggered control for greenhouse temperature based on Computational Fluid Dynamics (CFD) is investigated. To overcome the deficiency of sensor which can only represent the temperature value of some points inside the greenhouse, CFD technology is used to simulate and output the temperature field data of the entire greenhouse. Furthermore, in order to reduce the network resource consumption, the event-triggered mechanism is adopted in CFD simulation output-controller channel. When the greenhouse temperature meets the event-triggered condition, the simulated data is transmitted to the controller. Moreover, multi-objective particle swarm optimization (MOPSO) is used to design the controller to solve the contradiction between energy consumption and control accuracy in the control process. Finally, a numerical simulation example is provided to illustrate the effectiveness of given event-triggered scheme for greenhouse temperature under natural ventilation based on CFD simulation. The simulation results show that the control scheme given in this paper can effectively regulate the greenhouse internal temperature and meet the control requirements.

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Development and Validation of Inner Environment Prediction Model for Glass Greenhouse using CFD

Cited by 5 publications

References 5 publications

Research on intelligent building greenhouse plant factory and “3-Positions and 1-Entity” development mode

Research on intelligent building greenhouse plant factory and “3-Positions and 1-Entity” development mode

CFD Simulation Study on the Cooling Characteristics of Shading and Natural Ventilation in Greenhouse of a Botanical Garden in Shanghai

Event-triggered control for greenhouse temperature under natural ventilation based on computational fluid dynamics

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