土壤高温储热条件下热湿迁移过程的实验研究  

EXPERIMENTAL STUDY OF HEAT AND MOISTURE TRANSFER PROCESS FOR HIGH-TEMPERATURE HEAT STORAGE OF SOILS

作　　者：王华军[1] 齐承英[1] 王恩宇[1] 杜红普[1] 李海艳[1] 

机构地区：[1]河北工业大学能源与环境工程学院,天津300401

出　　处：《太阳能学报》2010年第7期824-828,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(No.50906020);天津市应用基础及前沿技术研究计划(No.10JCYBJC08500)

摘　　要：建立了土壤高温储热热湿迁移过程的实验装置,对不同储热温度和初始湿度下的土壤温度场、湿度场及地下换热量等动态特性进行了实验分析。实验结果表明:储热温度和初始湿度是影响土壤高温储热热湿迁移过程的重要因素。在高温储热条件下,温度场和湿度场之间具有十分强烈的关联性,且在靠近热源的地方易出现湿度峰值和温度峰值现象,湿度场的稳定时间整体上略滞后于温度场。在大尺度上,热湿迁移倾向于同时沿重力和径向方向进行,此效应对热湿迁移过程也具有较大的影响。An experimental setup to study the heat-moisture transfer process under high-temperature heat storage of soils was built, and the dynamic characteristics of the temperature, moisture content and heat-transfer rate of the ground were analyzed experimentally. Experimental results showed that the heat-storage temperature and initial moisture contents are two important factors affecting the heat-moisture transfer process. There is a strong relevance between the temperature filed and the moisture-content field, and there may be a peak of the temperatures and moisture contents near the soil clos- ing to the heat source. Compared with the temperature field, the steady time of the moisture contents tended to lag be- hind, which are in agreement with the previous studies. For the macro-scale, the heat-moisture transfer process under high-temperature heat storage of soils usually conducted along the radial and gravitational direction simultaneously, which had a major effect on the above process.

关 键 词：土壤 高温储热 热湿迁移 峰值现象 

分 类 号：TK124[动力工程及工程热物理—工程热物理]