CFD and experimental analysis of greenhouse climate and plant comfort in mediterranean regions: impact of crop presence and time variations

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

This study investigates indoor climate dynamics within a large-scale soilless greenhouse in Manouba, northern Tunisia, examining the effects of daily environmental variations. By combining experimental and numerical methods, it analyzes how factors such as glazing, ventilation, crop type, concrete surfaces influence conditions. The validated model’s accuracy, particularly for temperature profiles, by comparing its outputs with data. To ensure reliability, model underwent rigorous testing, including grid independence analysis, incorporation turbulence radiation models, optimization to reflect external conditions accurately. Simulations were run without crops, showing that presence crops raised temperatures approximately 1 K lettuce 2.2 tomato, emphasizing importance optical properties transpiration on distribution ventilation. Temperature patterns varied, 1.2% drop center between 13 h 16 2.4% increase from 9 h. Ground-level highest, largely due solar radiation. established strong correlation predict changes response factors, accounting crops. Additionally, research addresses thermal comfort indicators like vapor pressure deficit (VPD), offering insights into optimal management across different scenarios. findings provide valuable guidance engineers distribution, suggesting effective sensor placement, monitoring techniques, control strategies improve performance yield.

Language: Английский

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Numerical Investigation of CFD Parameters: Evaluating Height Variations on Microclimate and Crop Performance in Large-Scale Soilless Greenhouses in Northern Tunisia

Journal of Engineering Research, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Effects of Height Dimensions on the Microclimate of a Soilless Greenhouse: A Numerical Study

Lecture notes in mechanical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 655 - 663

Published: Jan. 1, 2025

Language: Английский

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Impact of greenhouse roof height on microclimate and agricultural practices: CFD and experimental investigations

Journal of Thermal Analysis and Calorimetry, Journal Year: 2024, Volume and Issue: 149(11), P. 5483 - 5495

Published: May 25, 2024

Language: Английский

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Enhancing climate control and management in arid conditions: A numerical study on the impact of roof pitch angle on greenhouse climates

Journal of Engineering Research, Journal Year: 2024, Volume and Issue: unknown

Published: May 1, 2024

This paper presents a comprehensive investigation of the impact roof pitch angle on microclimate in greenhouses, particularly arid regions. The research combines experimental datasets with numerical modeling. model aims to assess collective effects internal environment involving crops, soil, polyethylene, and air. Validation outcomes is conducted through comparison data, specific focus temperature velocity profiles derived from greenhouse prototype. study incorporates optimization, encompassing turbulence selection grid independence analysis, ensure reliability model. results demonstrate that significantly affects distributions interior temperature, fields, Discrete Ordinates (DO) irradiation, static pressure. To accurately capture such variations, robust correlations were established. In addition, comparative analysis crop height (Hc) was carried out demonstrating direct effect both profiles. fact, at Hc 1 m, reaches T = 321.5 K, whereas for 0.5 does not exceed 318 K. finding holds significant implications design agricultural operations, advancing our understanding intricate dynamics govern within especially findings this work provide valuable insights into as well climates underscores importance precise modeling control successful management.

Language: Английский

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Numerical Investigation of the Impact of Crops on the Greenhouse Environment

Lecture notes in mechanical engineering, Journal Year: 2024, Volume and Issue: unknown, P. 236 - 243

Published: Jan. 1, 2024

Language: Английский

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