地下建筑动态热工环境数值分析研究

【作者】 宋翀芳；

【导师】 李安桂；

【作者基本信息】 西安建筑科技大学 ， 供热通风与空调工程， 2001， 硕士

【摘要】 本文分析了一般地下建筑的传热特性；基于地下建筑的传热机理，建立了深埋地下建筑动态传热的数学模型；在边界条件的处理上，引进了反应系数的概念使动态问题得以解决；依据建立起的传热微分方程以及边界条件，编制了相应的计算机程序；应用此程序对溪洛渡电站地下各厂房内的热工环境进行了模拟，计算出各段洞室全年逐日室内平均温度、全年逐日壁面温度、全年逐日壁面吸放热量等，并且论证了计算结果的合理性，为空调负荷的最终确定以及设备的选取提供了科学的依据。 本文针对溪洛渡电站通风空调系统的设计，结合该电站自身的特点，作了三种通风空调方案下厂房内热工环境的计算比较及优化，最终推荐方案2下的季节性风量调节系统为最佳。 此外，文中还具体分析了通风量、进风温度、室内热源以及洞室尺寸对壁面传热的影响，对地下建筑通风空调的设计计算提供了一些参考意见。 最后将本文程序计算与中国建筑科学研究院物理所在处理地下建筑热工环境时采用的计算方法进行了比较，两者结果基本吻合。更多还原

【Abstract】 In this paper, analyzes the heat transfer characteristic of the general underground structure.Sets up a mathematical model of unsteady heat transfer of deep underground structure based onthe mechanism of heat transferL Leads the coefficient of response into boundary conditions tomake the dynamic problem solved. Draws up corresponding computer program for the heattransfer differential equation and boundary conditions. Using this program simulates the thermalenvironment in the underground plant of Xi Luo Du hydropower station. The calculation resultsinclude indoors average temperature day by day in a year, wall temperature and heat transferthrough envelope day by day in a year, and proves the rationality of the results. All of theseprovide the scientific guideline for the final cooling load and the choice of air conditioner.In the light of the characteristic of Xi Luo Du hydropower station, compares three plans ofventilation and air conditioning system for the plant, according the results, recommends it thebest one that air flow is regulated seasonal in the second plan.In addition,makes a concrete analysis of the relations between heat transfer throughenvelope and other conditions such as airflow, inlet temperature, heat source and size of structure,and makes some suggestions to designing for ventilation and air conditioning of undergroundstructure.Finally, compares the results calculated by the computer system in this paper with it by thecalculation method woken out by the Physics Institute of Architecture Research Institute of China.the results shows both are basically coincidence.更多还原