日光温室动态热湿环境作用下土壤-空气换热器热湿传递规律及数理模型研究

项目名称： 日光温室动态热湿环境作用下土壤-空气换热器热湿传递规律及数理模型研究

项目编号： No.51476108

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 杜震宇

作者单位： 太原理工大学

项目金额： 83万元

中文摘要： 本项目针对日光温室动态热湿环境作用下，土壤-空气换热器热湿传递过程所蕴含的非线性和多物理场耦合的热物理问题，从试验、理论分析和数值仿真三方面来研究换热器温度场与湿度场耦合作用下复杂的热湿交换规律和机理。通过试验研究和理论分析，认识湿空气在换热管中沿长度方向的热湿迁移规律；揭示有内热源或热汇的土壤中，土壤温度梯度和湿度梯度协同作用下热湿传递相互削弱或增益的机理；探究土壤表面在辐射、对流、导热等复杂作用下的热湿传输机理。基于试验测定和机理认识，建立多维度、多场耦合的土壤-空气换热器数理模型，并利用模型开展瞬态响应特性的仿真研究，分析不同操作参数和结构参数对换热器温度场和湿度场分布的影响。在实验方面，开展全尺度土壤-空气换热器瞬态热湿响应特性的试验测定，为机理研究及进一步改进和完善数理模型积累相关试验数据。研究结果可为土壤-空气换热器设计和优化提供理论基础和科学依据，具有重要的实用价值和科学意义

中文关键词： 土壤-空气换热器；日光温室；热湿环境；热湿传递规律；数理模型

英文摘要： This project aimming at thermal physical problems which is nonlinear and multi-physical fields coupled and implicated in the heat and humidity transfer mechanism of Earth-Air-Heat-Exchanger in the dynamic thermal and humidity environment in sunlight-greenhouse, from the experiment, the theory analysis and numerical simulation to research the complex law and mechanism of heat and moisture exchange in coupling between the distribution of temperature and humidity. Through the study of moist air by experimental and theoretical analysis, acquiring the law of transfer of heat and moisture in the pipe of heat exchanger along the direction of length; revealing the law and mechanism of heat and moisture transfer which temperature gradient & humidity gradient synergy effection gain and weaken in the soil which has heat source and intersection;discovering the law and mechanism of heat and moistuer transfer under the complex effects of heat conduction, convection and radiation; establishing mathematical model of Earth-Air-Heat-Exchanger that is multidimensional and multi field coupling based on experimental determination and the principle, and carry out its simulation study of transient response characteristics by the model, analysis the effects of internal temperature and humidity field caused by different operating and structural parameters. In the experiment, carried out a transient thermal response test of Earth-Air-Heat-Exchanger that is full size. Accumulate relevant test data for mechanism research and further improve or perfect mathematical model. And the result provides theoretical basis and scientific basis for design and optimization of Earth-Air-Heat-Exchanger, with important pragmatic value and scientific significance.

英文关键词： Earth-Air-Heat-Exchanger;Sunlight-greenhouse;Thermal and humidity environment;Heat and moisture transfer law;Mathematical model