新型管壳式相变蓄热器的设计与数值模拟  

The new shell and tube of phase change heat accumulator design and numerical simulation

作　　者：华建社[1] 张焱[1] 张娇[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《节能》2015年第11期24-29,2,共6页Energy Conservation

摘　　要：设计了新型具有内外双螺旋结构的翅片管式蓄热换热器,通过Gambit软件建立三维蓄热体相变蓄、放热过程的物理模型和数学模型,运用Fluent软件对换热器的蓄、放热过程进行模拟。研究表明新型换热器的蓄、放热效率要比光管、仅有外螺旋翅片以及仅有内螺旋翅片的换热器高。最后对相变材料和外螺旋翅片的间距进行了优化,结果得出添加0.5%膨胀石墨/石蜡的复合相变材料要比纯石蜡蓄热时间缩短34%,翅片螺距对蓄热器的蓄热性能有重要的影响。Designed a new double helix structure having inner and outer finned tube-type heat ex-changer through gambit software establishment a three-dimensional phase change thermal storage body physical and mathematical models of endothermic and exothermic process,using fluent software simulate endothermic and exothermic process.Research shows that the endothermic and exothermic efficiency of new double helix structure heat accumulator faster than fluorescent tubes,only just within the outer spiral fin and fin heat ex-changer spiral higher.Finally,optimize the phase change material and the outer spiral fin spacing,the result added 0.5%expansion of the composite graphite /paraffin wax phase change material than pure regenerative time shorten by 34%,fin pitch have an important influence on the regenerative properties of heat accumulator.

关 键 词：蓄热器 相变材料 双螺旋结构 数值模拟 

分 类 号：TK02[动力工程及工程热物理]