用均摊恒定热流法分析热不平衡率的合理区间  

Analysis of Reasonable Interval of Thermal Imbalance Ratio Using the Average Constant Heat Flux Method

作　　者：贾智强[1] 李科群[1] 孙浩琳 汪春宇[1] 李续[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《建筑节能》2015年第1期1-5,9,共6页BUILDING ENERGY EFFICIENCY

基　　金：国家自然科学基金:高压加热器启动及运行模拟仿真技术研究(20071001-1)

摘　　要：结合工程实例，用完全均摊恒定热流法和分段均摊恒定热流法分别分析了不同热不平衡率下，埋地管群换热器运行25年内土壤的平均温度变化；提出了评价长期运行的埋地管群换热器的两大指标：换热效率、温升幅度；并用这两大指标分析出此工程的合理热不平衡率区间为0.05～0.10，可为以后工程设计提供参考。Combined with engineering cases, based on different thermal imbalance ratio, the complete average constant heat flux method and the section average constant heat flux method were proposed to study the change of average soil temperature in 25 years respectively. Two indexes were proposed, includ-ing the heat exchange efficiency and the rising rate of temperature, which are used to evaluate the buried pipelines heat exchangers running for long time. Furthermore, the two indexes were used to analyze the rea-sonable interval of thermal imbalance ratio, and the range of 0.05~0.10 was obtained. The conclusion could provide references for the later engineering design.

关 键 词：土壤平均温度 换热效率 温升幅度 热不平衡率 数值分析 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]