The simulation analysis and comparison of r404a and r410a in parallel - flow type condenser 應(yīng)用于平行流冷凝器的模擬分析比較
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 研究了電池溫度管理系統(tǒng)的常用的平行氣流風(fēng)冷方式的熱力學(xué)狀態(tài)和能量流動(dòng),并建立了鍵合圖模型。
( 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 )利用保角變換方法求出v ?型條紋的縱向和橫向突出高度,在此基礎(chǔ)上得出縱向流、橫向流和帶角度流動(dòng)時(shí)的降阻特性,并分析結(jié)果;而且分析了葉片型條紋和u ?型條紋表面上的降阻情況,提出水下具有最佳降阻效果的條紋表面設(shè)計(jì)準(zhǔn)則。
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 在進(jìn)行仿真試驗(yàn)時(shí),以使用r134a作制冷劑的管帶式蒸發(fā)器和平行流式冷凝器為對(duì)象,完成了穩(wěn)態(tài)仿真計(jì)算、試驗(yàn)和動(dòng)態(tài)仿真分析,穩(wěn)態(tài)計(jì)算結(jié)果和試驗(yàn)數(shù)據(jù)對(duì)比表明,其誤差在允許范圍內(nèi);進(jìn)口質(zhì)量和焓值的擾動(dòng)試驗(yàn)結(jié)果表明:本文所建的區(qū)段式換熱器仿真模型,能很好的反映換熱器性能參數(shù)的動(dòng)態(tài)變化,與系統(tǒng)熱動(dòng)力學(xué)理論和冷凝器、蒸發(fā)器的實(shí)際工作過(guò)程基本一致。