The simulation analysis and comparison of r404a and r410a in parallel - flow type condenser 应用于平行流冷凝器的模拟分析比较
Also the thermodynamics condition and energy flow of the parallel - flow air cooling mode that is one of the modes of battery ' s temperature management system is studied , and the bond graph model of the temperature management system is built 研究了电池温度管理系统的常用的平行气流风冷方式的热力学状态和能量流动,并建立了键合图模型。
( 3 ) using conformal mapping , the longitudinal protrusion height and the lateral protrusion height on the v - grooved surfaces are given , on this basis , some drag reducing features in parallel - flow , cross - flow and enlarge - flow are presented and analyzed ; in addition , drag reducing features with blade - shaped grooves and u - shaped grooves are discussed , consequently , the riblets designing criterions are suggested which will reduce the drag and noise most effectively underwater ( 3 )利用保角变换方法求出v ?型条纹的纵向和横向突出高度,在此基础上得出纵向流、横向流和带角度流动时的降阻特性,并分析结果;而且分析了叶片型条纹和u ?型条纹表面上的降阻情况,提出水下具有最佳降阻效果的条纹表面设计准则。
Examinations of steady status and analysis of dynamic experiments have been conducted on band - tube evaporator and parallel - flow condenser using r134a refrigerant . the steady examination show that the model error was under the allowable error , the inlet mass and enthalpy disturb experiments indicate that the subsection model , be good at reflecting the change of parameters of the heat exchanger , accord with the basic principle of thermodynamics theory and the actual work status . hence , the subsection simulation model research has important benefits both on theory and engineering application 在进行仿真试验时,以使用r134a作制冷剂的管带式蒸发器和平行流式冷凝器为对象,完成了稳态仿真计算、试验和动态仿真分析,稳态计算结果和试验数据对比表明,其误差在允许范围内;进口质量和焓值的扰动试验结果表明:本文所建的区段式换热器仿真模型,能很好的反映换热器性能参数的动态变化,与系统热动力学理论和冷凝器、蒸发器的实际工作过程基本一致。