dynamic analysis of heat exchanger 中文意思是什麼
dynamic analysis of heat exchanger
解釋
換熱器的動態分析-
Analysis is made on structure characteristics of the finned - tube, and analysis has been made on the special heat and mass transfer principle of every micro - unit under both dry and wet conditions. appropriate hypothesis is made and based on the energy, mass and momentum equivalent, the evaporator models of dynamic distributed parameters are set up. in addition, the gascooler and internal exchanger models of dynamic and distributed parameters, the throttling valve models and the compressor models are set up, too
本文的內容如下： 1對翅片管蒸發器的結構特點進行分析，選取適當的微元體，對于干、濕工況下每個微元分別進行傳熱傳質分析，通過適當的假設，利用質量守恆方程、能量守恆方程和動量守恆方程建立了蒸發器的分佈參數數學模型；對回熱器劃分微元建立了分佈參數數學模型；對氣體冷卻器建立了分佈參數數學模型；對壓縮機建立了數學模型；建立了節流閥的數學模型，為系統模擬奠定了基礎。 -
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
在進行模擬試驗時，以使用r134a作製冷劑的管帶式蒸發器和平行流式冷凝器為對象，完成了穩態模擬計算、試驗和動態模擬分析，穩態計算結果和試驗數據對比表明，其誤差在允許范圍內；進口質量和焓值的擾動試驗結果表明：本文所建的區段式換熱器模擬模型，能很好的反映換熱器性能參數的動態變化，與系統熱動力學理論和冷凝器、蒸發器的實際工作過程基本一致。 -
Based on the comparative analysis of two available heat system plan, the paper selects the water - water heat pump system plan. after a series of character analysis, design calculation ; the style of compressor including media choosing and its circle dynamic calculation for the thermodynamic system is determined. besides this, based on some basic measure of thermodynamic analysis, the heat pump coefficient of performance is discussed ; the exergy analysis for the water - water heat plan is conducted ; the calculation formula of heat pump exergy efficiency is derived ; an optimal model for heat pump together with thermal machine is established and the main exchanger equipment in heat pump system including its resistance calculation is designed in details
本文通過對兩種系統方案進行比較分析，確定了水環熱泵系統的基本方案，經過定性分析和設計計算，進行了壓縮機的選型、工質的選擇、熱力系統的循環計算等基本設計，同時應用熱力學分析的一些基本方法，討論了如何評價熱泵系統的性能系數，並對電廠循環水余熱回收熱泵系統進行了（火用）分析，得到了熱泵過程（火用）效率的計算公式，建立了熱泵?熱機聯合機組優化模型，還對熱泵系統的主要換熱設備進行了詳細的結構設計和阻力計算，最後對熱泵系統進行了技術經濟分析和評價。 -
Analysis of the influence of temperature and stress on the dynamic characteristics of heat exchanger tube bundles
溫度應力對換熱器管束動特性的影響分析
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