The creation of a temperature-regulated greenhouse model for crop cultivation in Northeastern Thailand

The creation of a temperature-regulated greenhouse model for crop cultivation in Northeastern Thailand

This study investigated optimal greenhouse cooling configurations for extreme tropical climates using CFD modeling, focusing on Northeastern Thailand where temperatures reach 43.6 °C. The key finding revealed that a 15° air inlet angle combined with three bottom-positioned exhaust fans achieved the...

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Bibliographic Details
Main Authors: Sakkarin Wangkahart, Chaiyan Junsiri, Aphichat Srichat, Kittipong Laloon, Kaweepong Hongtong, Phaiboon Boupha, Somporn Katekaew, Sahassawas Poojeera
Format: Article
Language:English
Published: Elsevier 2025-10-01
Series:Ain Shams Engineering Journal
Subjects:
Computational fluid dynamics
Protected agriculture
Microclimate
CFD model
Simulation
Online Access:http://www.sciencedirect.com/science/article/pii/S2090447925003521
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Summary:This study investigated optimal greenhouse cooling configurations for extreme tropical climates using CFD modeling, focusing on Northeastern Thailand where temperatures reach 43.6 °C. The key finding revealed that a 15° air inlet angle combined with three bottom-positioned exhaust fans achieved the most effective cooling, reducing greenhouse temperature to 35.72 °C − a critical 7.88 °C reduction from ambient conditions. This configuration outperformed 30° and 45° inlet angles, which maintained higher temperatures of 36.55 °C and 36.98 °C respectively (p < 0.05). The superior performance of the 15° angle resulted from its unique spiral airflow pattern that enhanced heat transfer efficiency across plant cultivation areas. CFD simulations of 27 different ventilation configurations demonstrated that bottom-positioned exhaust fans consistently outperformed middle and top positions. Model validation showed excellent agreement with experimental data (RMSE = 2.21 °C, MAE = 0.53 °C). These findings provide a practical solution for tropical greenhouse design, offering a cost-effective approach to maintain temperatures within the optimal 25–35 °C range for crop production in regions experiencing extreme heat. The research addresses the specific needs of Thai farmers using elevated planting systems, combining temperature control with ergonomic considerations.
ISSN:2090-4479

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