CAJ | 학술논문

从多孔介质传热传质学基本原理出发，充分考虑了有蔬菜覆盖条件下的地下土壤固体颗粒、液相流体及气相流体的传热传质过程，建立了日光温室内蔬菜生长情况下土壤二维非稳态传热模型。该模型根据土壤中热、水、气的耦合迁移建立二维非稳态微分方程组，运用高斯迭代法对方程组进行数值求解，利用 MATLAB 编写模型求解程序，对地下土壤的温度进行模拟，并对模拟结果进行分析。用试验温室实测值对模拟结果进行了验证，对地温的模拟结果平均绝对误差为0．4℃，平均相对误差为2．8％，表明所建模型模拟结果较好。同时，利用该模型模拟分析下沉深度为0、0．5、0．8、1．0、1．2、1．5m节能日光温室（不同下挖深度温室的结构参数完全一致）地下不同土壤深度温度变化特点，为在保定地区建造适宜的下沉深度温室提供理论依据。
종다공개질전열전질학기본원리출발，충분고필료유소채복개조건하적지하토양고체과립、액상류체급기상류체적전열전질과정，건립료일광온실내소채생장정황하토양이유비은태전열모형。해모형근거토양중열、수、기적우합천이건립이유비은태미분방정조，운용고사질대법대방정조진행수치구해，이용 MATLAB 편사모형구해정서，대지하토양적온도진행모의，병대모의결과진행분석。용시험온실실측치대모의결과진행료험증，대지온적모의결과평균절대오차위0．4℃，평균상대오차위2．8％，표명소건모형모의결과교호。동시，이용해모형모의분석하침심도위0、0．5、0．8、1．0、1．2、1．5m절능일광온실（불동하알심도온실적결구삼수완전일치）지하불동토양심도온도변화특점，위재보정지구건조괄의적하침심도온실제공이론의거。
In order to study further the distribution characteristics of the soil temperature in solar greenhouse , a two-di-mension unsteady heat transfer model of soil in solar greenhouse with crops inside was established .According to the method of the porous medium heat and mass transfer balance , the model took the solar greenhouse crop into account and fully considered the heat and mass transfer process of the underground soil solid particles , liquid fluid and gas phase flow .Based on the model of coupled water , heat and gas transport in the soil , the author built a two-dimension unsteady differential equations , which caused that the numerical equations were solved using Gauss iteration method , and wrote programs to solve the model using MATLAB .The soil temperature in the solar greenhouse was simulated and the results were analyzed .The simulated results were good and the mean absolute difference was 0 .4℃and the mean relative differ-ence was 2 .8 percent .Taking the solar greenhouses with the same structure but different sunken depths ( 0 , 0 .5 , 0 .8 , 1 .0 , 1 .2 and 1 .5 m ) , this paper simulated and analyzed the soil temperature change characteristics of different soil depth using the model .The simulated results can provide the theoretical basis for appropriate sunken depths of the solar greenhouse in Baoding area .