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Simplification and Experimental Verification for Temperature and Humidity Field Coupling Model of Conservatory Soil(PDF)

Transactions of Tianjin University[ISSN:1006-4982/CN:12-1248/T]

Issue:
2011年01期
Page:
33-38
Publishing date:

Info

Title:
Simplification and Experimental Verification for Temperature and Humidity Field Coupling Model of Conservatory Soil
Author(s):
CAO BinbinLI WeiyiLI Zhaoli
School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
Keywords:
DOI:

Abstract:
Based on the surface energy balance model which is widely used abroad, a temperature and humidity field coupling model of conservatory soil without crop vegetation in full illumination was established. Considering the rela- tively closed environment in conservatory, weak solar radiation and little surface evaporation of soil, the daily varia- tion of water content in different soil layers may be neglected, then the temperature and humidity field coupling model was simplified to a one-dimensional thermal diffusion model. The simplified model and the temperature and humidity field coupling model adopted the same computational method of soil physical parameters and discrete format of heat diffusion differential equations, and were applied to the continuous simulation of temperature field in conservatory soil without crop vegetation in full illumination. Through the comparison between simulation results and experimental data, the precision of the simplified model was verified. The typical rule of soil heat flux variation in a 24 h cycle was also obtained.

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Last Update: 2011-04-07