Numerical Investigation of the Greenhouse With the Floor and Other Cooling Systems

Abstract

This study used computational fluid dynamics (CFD) simulations to explore the effect of the greenhouse with the floor and other cooling systems (only an evaporative cooling system, only a floor cooling system, and equipped with both cooling systems) on temperature distributions inside a greenhouse. Three scenarios were analyzed using the finite volume method and several the Realizable k-ε turbulence model offered superior accuracy compared to the Standard k-ε model in simulating temperature distributions. However, significant discrepancies were observed near the wall surfaces of the greenhouse. To address this, a radiation model was incorporated alongside the Realizable k-ε turbulence model, which improved simulation accuracy by reducing error percentages down to 2-3% and better matching experimental results. The study emphasizes the importance of using the Realizable k-ε turbulence model with the radiation model to improve the accuracy of CFD simulations for the greenhouse with the floor and other cooling systems. © 2025, Thai Society of Mechanical Engineers (TSME). All rights reserved.