Maintaining optimal indoor environmental conditions for plant growth in greenhouse structures during hot summer periods presents a significant challenge in many regions. While natural and mechanical ventilation methods are commonly employed, there is a notable lack of theoretical simulation studies on greenhouse ventilation, particularly those incorporating light radiation and plant transpiration effects. This study employs Computational Fluid Dynamics (CFD) to simulate greenhouse environments, uniquely integrating both light radiation and plant transpiration factors in the analysis of mechanical ventilation characteristics. Through a combination of transient and steady-state calculations, temperature and humidity fields were comprehensively analyzed. Results indicate that positive pressure ventilation, symmetrical fan arrangement, and longitudinal airflow across plant shelves yield superior performance. Utilizing orthogonal experimental design and range analysis methodologies, a multi-factor variable analysis was conducted. Findings reveal that fan velocity exerts the most significant influence on the temperature field and the theoretical optimal combination was tested, and the most suitable combination scheme is selected according to the simulation results. This research provides valuable theoretical guidance for temperature and humidity control in greenhouses situated in subtropical monsoon climates.
References
[1]
Xu, Y., Li, X., Yang, Z., Li, H. and Gao, L. (2020) Analysis of the Reasons for the Gap between the Yield of Tomato Long Season Cultivation in China’s Continuous Glass Greenhouse and That of the Netherlands. China Vegetables, No. 10, 1-8. https://d.wanfangdata.com.cn/periodical/ChlQZXJpb2RpY2FsQ0hJTmV3UzIwMjMxMjI2Eg16Z3NjMjAyMDEwMDAxGghvd2lwaGVraQ%3D%3D
[2]
Shamshiri, R.R., Jones, J.W., Thorp, K.R., Ahmad, D., Man, H.C. and Taheri, S. (2018) Review of Optimum Temperature, Humidity, and Vapour Pressure Deficit for Microclimate Evaluation and Control in Greenhouse Cultivation of Tomato: A Review. International Agrophysics, 32, 287-302. https://doi.org/10.1515/intag-2017-0005
[3]
Sun, X., et al. (2021) Progress and Prospect of Research on Greenhouse Cooling Technology. South China Agricultural, 15, 42-47.
[4]
Li, Y., Wu, D. and Yu, Z. (1994) Simulation and Test Research of Micrometeorology Environment in a Sun-Light Greenhouse. Transactions of the Chinese Society of Agricultural Engineering, 10, 130-136.
[5]
Chen, Q. and Wang, Z. (1996) Dynamic Simulation of Sun-Light Greenhouse Thermal Environment. Journal of China Agricultural University, 1, 67-72.
[6]
Bai, J., Wen, X., Li, Y., Cui, J. and Ren, Y. (2019) Characteristics of Root Distribution and Water-Transportation Tissues of Apple Rootstocks Malusmicromaluand M9T337. Journal of Shanxi Agricultural University, 39, 46-54.
[7]
Han, Y., Li, A., Li, Y., Jia, X. and Zhao, D. (2015) The Influence of Different Root-zone Temperature Treatment on Tomato Leaves Stomata. Journal of Shanxi Agricultural Sciences, 43, 1234-1236. https://kns.cnki.net/kcms2/article/abstract?v=ACks_bcdpKkLDhqym6jKdAcTgtRRacY2P4SWh-CXgksW_nAyASP_vR6EMmBP5hvv21963MgrFmVRILGUfCxl9uSwTh-eeL-bDS8C8rG4FK6vQc03q5bBCyATW8JmZxUAjDh9IFqJUUAyfBjBpzroUg==&uniplatform=NZKPT&language=CHS
[8]
Yue, F., Huang, X. and Ji, Y. (2001) Study on Three-Dimensional and Efficient Planting Model of Strawberry and Muskmelon in Solar Greenhouse. The Journal of Shandong Agricultural Administrators’ College, No. 3, 155-135.
[9]
Li, C., Zhang, Y., Hu, Y., Lu, X. and Wang, X. (2009) Three-Dimensional Efficient Cultivation Pattern of Winter and Spring Stubble Solar Greenhouse Chilli-Bean Curd-Kale. Agriculture Engineering Technology, No. 2, 28-29.
[10]
Okushima, L., Sase, S. and Nara, M. (1989) A Support System for Natural Ventilation Design of Greenhouses Based on Computational Aerodynamics. ActaHorticulturae, 248, 129-136. https://doi.org/10.17660/actahortic.1989.248.13
[11]
Molina-Aiz, F.D., Fatnassi, H., Boulard, T., Roy, J.C. and Valera, D.L. (2010) Comparison of Finite Element and Finite Volume Methods for Simulation of Natural Ventilation in Greenhouses. ComputersandElectronicsinAgriculture, 72, 69-86. https://doi.org/10.1016/j.compag.2010.03.002
[12]
Kang, L., Zhang, Y., Kacira, M. and van Hooff, T. (2024) CFD Simulation of Air Distributions in a Small Multi-Layer Vertical Farm: Impact of Computational and Physical Parameters. BiosystemsEngineering, 243, 148-174. https://doi.org/10.1016/j.biosystemseng.2024.05.004
[13]
Saberian, A. and Sajadiye, S.M. (2019) The Effect of Dynamic Solar Heat Load on the Greenhouse Microclimate Using CFD Simulation. RenewableEnergy, 138, 722-737. https://doi.org/10.1016/j.renene.2019.01.108
[14]
Xu, F., Lu, H., Chen, Z., Guan, Z., Chen, Y., Shen, G., et al. (2021) Selection of a Computational Fluid Dynamics (CFD) Model and Its Application to Greenhouse Pad-Fan Cooling (PFC) Systems. JournalofCleanerProduction, 302, Article 127013. https://doi.org/10.1016/j.jclepro.2021.127013
[15]
Benni, S., Tassinari, P., Bonora, F., Barbaresi, A. and Torreggiani, D. (2016) Efficacy of Greenhouse Natural Ventilation: Environmental Monitoring and CFD Simulations of a Study Case. EnergyandBuildings, 125, 276-286. https://doi.org/10.1016/j.enbuild.2016.05.014
[16]
Xu, F., Cai, Y., Chen, J. and Zhang, L. (2015) Temperature/Flow Field Simulation and Parameter Optimal Design for Greenhouses with Fan-Pad Evaporative Cooling System. Transactions of the Chinese Society of Agricultural Engineering, 31, 201-208.
[17]
Shao, L. (2009) Numerical Analysis of Venlo-Type Greenhouse in Summer Thermal and Humid Environment. https://kns.cnki.net/kcms2/article/abstract?v=lWc4gvQ5J17QY_OvMGKAZRMcA12MenfTQ9d48ykVVjDJzM8S5uhXHgJdOAbCLZ0mFUhusCACBd5HCw2GhalCooYX6YuA-6usUGwtW3F2jCwSoGOOkxqQAX2NqgKgFwaFr1qwas6Zulj941pV-louGA==&uniplatform=NZKPT&language=CHS
[18]
He, X., Wang, J., Guo, S., Zhang, J., Wei, B., Sun, J., et al. (2018) Ventilation Optimization of Solar Greenhouse with Removable Back Walls Based on CFD. ComputersandElectronicsinAgriculture, 149, 16-25. https://doi.org/10.1016/j.compag.2017.10.001
[19]
Zhang, X., Wang, H., Zou, Z. and Wang, S. (2016) CFD and Weighted Entropy Based Simulation and Optimisation of Chinese Solar Greenhouse Temperature Distribution. BiosystemsEngineering, 142, 12-26. https://doi.org/10.1016/j.biosystemseng.2015.11.006
[20]
Villagrán, E.A., Baeza Romero, E.J. and Bojacá, C.R. (2019) Transient CFD Analysis of the Natural Ventilation of Three Types of Greenhouses Used for Agricultural Production in a Tropical Mountain Climate. BiosystemsEngineering, 188, 288-304. https://doi.org/10.1016/j.biosystemseng.2019.10.026
[21]
Roy, J.C., Vidal, C., Fargues, J. and Boulard, T. (2008) CFD Based Determination of Temperature and Humidity at Leaf Surface. ComputersandElectronicsinAgriculture, 61, 201-212. https://doi.org/10.1016/j.compag.2007.11.007
Aydogdu, M. (2023) Analysis of the Effect of Rigid Vegetation Patches on the Hydraulics of an Open Channel Flow with Realizable K-Ε and Reynolds Stress Turbulence Models. FlowMeasurementandInstrumentation, 94, Article 102477. https://doi.org/10.1016/j.flowmeasinst.2023.102477
[24]
Salim, S.M. and Cheah, S. (2009) Wall Y+ Strategy for Dealing with Wall-Bounded Turbulent Flows. ProceedingsoftheInternationalMulticonferenceofEngineersandComputerScientists, 2, 2165-2170.
[25]
Lodh, B.K., Das, A.K. and Singh, N. (2017) Investigation of Turbulence for Wind Flow over a Surface Mounted Cube Using Wall Y+ Approach. IndianJournalofScienceandTechnology, 10, 1-11. https://doi.org/10.17485/ijst/2017/v10i8/109197
[26]
Zhang, X. (2021) How to Cool Down Vegetable Greenhouses in Summer. The Farmers Consultant, No. 19, 48-49. https://d.wanfangdata.com.cn/periodical/ChlQZXJpb2RpY2FsQ0hJTmV3UzIwMjMxMjI2Eg1uamNtMjAyMTE5MDQ1Ggh0N3ZqOGxwdA%3D%3D https://doi.org/10.23880/chij-16000125
[27]
Kong, D., Yu, H., Li, Y. and Tian, Y. (2010) Effect of Drought Stress on Photosynthesis and Physiologica Characteristics of Chrysanthemum Morifolium. JournalofNorthwestA & FUniversity-NaturalScienceEdition, 38, 103-108.
[28]
Chacón-Rebollo, T. and Lewandowski, R. (2013) Mathematical and Numerical Foundations of Turbulence Models and Applications. Birkhäuser New York.
[29]
Chang, W. (2023) Experimental and Numerical Study on Precise Spray Ventilation Cooling and Humidity Control in Greenhouse. https://link.cnki.net/doi/10.27012/d.cnki.gdhuu.2023.001142
[30]
Liu, F. and Weng, M. (2021) Experimental Design and Data Processing. Chongqing University Press, Chongqing
[31]
Wang, M., Zhao, T., Zhang, W. and Shi, Y. (2007) Effects of Interactions between Elevated CO2 Concentration and Temperature Drought on Physio-Ecological Processes of Plants. AgriculturalResearchintheAridAreas, No. 2, 99-103. https://kns.cnki.net/kcms2/article/abstract?v=vYzgd5_tBo8GtG-Su-_G_sbb1KfcZAVW2--N5qENopTCkPC_m0TX8aJsBIYXsblV-5A5yVISvh-DOeb5q2M3mAsQSjMDbL7Ds9z_pzBz0iSFhzj6SLBvgXGllB3JLp5rGyH79Wa5KAE=&uniplatform=NZKPT&language=CHS
[32]
Liu, Y. and Ding, J. (2007) Effect of Temperature and Humidity on Chrysanthemum Seedlings. ModernAgriculture, No. 11, 14-17.
