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Comprehensive Simulation for microclimate environment with Computational Fluid Dynamics Methods and Its Application for Optimal Sensor Placement in Small-Scale Greenhouse

Comprehensive Simulation for Microclimate Environment with C...

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作者： Yanzheng Liu Guanghui Teng Yaoze Liu Tingwu Xu Youquan Jiao Chunting Li Yan Li Xiangjun Wang Department of Hydraulic and Civil Engineering Beijing Vocational College of Agriculture College of Hydraulic and Civil Engineering China Agricultural University International College at Beijing China Agricultural University

The accuracy of information monitoring is significant to increase the effect of Greenhouse environment *** to place sensor in the greenhouse in order to increase the accuracy of information monitoring has become an urgent issue to be solved *** this paper,by taking simulation for the temperature field in the small-scale greenhouse model as an example,the CFD（Computational Fluid Dynamics） simulation model for measuring the microclimate environment of greenhouse with the principle of thermal environment formation was established,and the temperature distributions under the condition of mechanical ventilation was also *** results showed that the CFD model and its solution simulated for greenhouse thermal environment could describe the changing process of temperature environment within the greenhouse;the most suitable turbulent simulation model was the standard k—ε *** the condition of mechanical ventilation,because the effects of shading and supplemental lights to temperature environment within greenhouse in small scale greenhouse model,the average deviation between the simulated value and the measured value was 0.5 ℃,which was 3.9 percent of the measured *** distribution of temperature filed had obvious layering structures,and the temperature in the greenhouse model decreased gradually from the periphery to the *** on these results,the sensor number and the optimal sensor placement were determined with CFD simulation method.

关键词： Greenhouse microclimate environment Comprehensive Simulation Computational Fluid Dynamics Analysis Optimal Sensor Placement

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Thermal Comfort Measurement and Landscape Reconstruction Strategy of Street Space Based on Decomposition Grid Method:A Case Study of Yangmeizhu Street

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Journal of Landscape Research 2020年第3期12卷 33-38,46页

作者： YANG Xin HE Shuang ZHANG Qi School of Architecture and Art North China University of TechnologyBeijing 100043China View Unlimited Landscape Architecture Studio of China Urban Construction Deisgn&Research Institute Co. LtdBeijing 100120China

As an important public space in the city,street space is the second residence of *** Yangmeizhu Street as the research object,this study established a street microclimate model in Beijing through microclimate measurement and simulation,and then calculated thermal comfort index of the street and evaluated thermal comfort of the street space and distribution *** evaluation method used grid method to decompose and study and made several 10m×10m grids for inner space of the street,so as to compare deeply difference of microclimate environment in the street and analyze quantitatively relevance between street space elements(street pavement,street greening,building shadow coverage)and thermal comfort(physiological equivalent temperature PET)in the ***,adaptive strategy of microclimate on street level was put forward to improve the environmental quality of public space in the old city by means of landscape design,aiming at creating a resilient and humanized street space and improving adaptability of microclimate and thermal comfort for living.

关键词： Thermal comfort Grid method Street space Yangmeizhu Street microclimate environment

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