逆流交換 的英文怎麼說

中文拼音 [nìliújiāohuàn]
逆流交換 英文
countercurrent exchange
  • 逆 : Ⅰ形容詞1 （方向相反） contrary; counter 2 [數學] inverse; converse Ⅱ動詞1 （抵觸; 不順從） go aga...
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 交 : Ⅰ動詞1 （把事物轉移給有關方面） hand over; give up; deliver 2 （到某一時辰或季節） reach （a cert...
  • 換 : 動詞1. （給人東西同時從他那裡取得別的東西） exchange; barter; trade 2. （變換; 更換） change 3. （兌換） exchange; cash
  • 逆流 : anarrhea; backset; backwash; contra flow; counter flow; eddy; receding; counter current; reverse ...
  1. Counterflow heat exchanger

    逆流熱交換器
  2. High - frequency link power converters are receiving increasing attention. when the input frequency of ac - ac converter is quite high, such as 20khz or above, in order to make sure the converter switching action is restricted to the zero crossing point of the link voltage, the switching cycle becomes discrete pulse spectrums, however, the conventional pwm converters are ruled out because they would fail either to the efficiency or the low - distortion criteria

    當交-交變頻器的輸入頻率非常高，通常為20khz時，為了在零電壓條件下實現逆變器開關管的通斷，變換器的開關時刻必須選擇在高頻交流電壓脈沖為零時，這意味著變換器開關時刻在時間軸上成為不連續的點，而常規的硬開關pwm變換器是將開關時刻選擇在任意時刻。
  3. The second chapter simply introduces the development of alternate asynchronous inverter technology and retrospects some types of energy - saving systems for hydraulic elevators. then the working principles of the project are discussed and analyzed at four different working status, i. e. light load upwards, heavy load upwards, light load downwards and heavy load downwards. and the chapter focus on the introduction of structure design of pump station, calculation and type selection of pump / motor reversible units, research on oil leakage principles of accumulator circuit, design of accumulator - pump / motor pressure - energy transformer and integrated valve blocks, etc. the last but not the least, the electrical wiring of vector inverter control cabin and design of computer control and data acquisition system are introduced

    論文第二章首先簡單介紹了交流異步電動機變頻調速技術的發展概況，在回顧電梯液壓控制系統節能技術的基礎上，介紹了本課題研製的「採用蓄能器的液壓電梯變頻節能控制系統研究」的基本原理，分析了動力系統在電梯轎廂輕載上下行、重載上下行等四種典型工況下的基本工作狀態和工作方式；詳細地介紹了本課題節能系統液壓動力泵站的結構設計和參數設計，重點研究了液壓動力泵站的結構設計、液壓泵馬達可逆性問題及其選型設計計算、蓄能器迴路泄漏油損失機理的研究及其補償裝置的設計、蓄能器-泵馬達壓力能量轉換裝置的設計、多功能集成控制閥組的設計等內容；最後簡單介紹了本課題矢量控制變頻控制櫃的外部附件電氣接線、計算機控制及數據採集系統的硬體設計等內容。
  4. In a word, wbaer can effectively remove micro - quantity hmi from dk with alkali metals, alkaline - earth metals and anions at high concentration. on the basis of lots of regeneration experiments of wbaer ( d301g ), the best regeneration manner ( regurgitation regeneration ), the optimal regeneration agents ( h2so4 and naoh ) and the optimum operating parameters of regeneration are obtained

    論文進而對d301g型弱堿性陰離子交換樹脂進行了再生試驗研究，確定了最佳再生方式（逆流再生） ，最佳再生劑（ h2so4和naoh ）以及酸液再生時的最佳濃度范圍（ 2 % 4 % ）和最佳流速范圍（ 3 4m / h ） ；並通過正交試驗確定了逆流再生過程中的最佳運行參數組合。
  5. The blast furnace is a heat exchanger and also an oxygen exchanger of the gas and row, there are many physical and chemical changes in it. it is not very reasonable to develop a model only consider the statistics relations

    但高爐是從風口迴旋區到料線的氣固逆流熱交換器；也是從軟熔帶到料線的逆流氧化交換器，其內進行著非常復雜的物理和化學反應。
  6. Using lithium bromide aqueous solution as liquid desiccant, adopting the total heat transfer rate and enthalpy efficiency to describe the combined heat and mass transfer performance and the moisture removal rate and regenerative efficiency to describe the mass transfer performance of the regenerator, explores the effect of air and desiccant inlet parameters on the regenerator performance by experiment, and compares the result obtained with those of other counter - flow configurations previously published

    以溴化鋰溶液為除濕劑，採用總換熱量、全熱效率描述再生器的熱質交換總體效果，採用再生量、再生效率描述傳質效果，實驗測試了溶液和空氣的進口參數對再生器性能的影響，並與逆流再生器的實驗結果進行了比較。
  7. The steady frequency three - phase ac can be changed into the ac which frequency is continuously adjusted in the experiment unit composed of rectifier, inverter, control circuit, and relay safeguard circuit

    Spwm三相變頻實驗單元能夠把頻率固定的三相交流電變換成頻率連續可調的三相交流電，它主要包括交直變換、逆變、控制和繼電保護電路。
  8. The principle of ac - dc - ac locomotive is that transformer transforms the high single - phase ac voltage from contact system to lower ac voltage first, then rectifier transforms this ac voltage to steady dc voltage, finally converter transforms this dc voltage to three - phase vfvv ac voltage as the voltage source for asynchronous machine

    交?直?交型電力機車系統的原理是：先將從接觸網獲得的單相交流高電壓經變壓器降壓后，再經整流器變換為平穩的直流電壓，直流電壓經逆變器變換為三相交流電壓，供給機車輪對上的牽引電機。
  9. The design of excitation power source based on principle of three phase step motor and pulse width modulation ( pwm ) technology, intelligent power model ( ipm ) is used for inverter switches, the output ac pulse used as excitation signals. the speed of rotation and magnetic intensity can be changed by regulate the exciting converted frequency and magnitude of exciting current. constant current is achieved by closed loop feed back

    勵磁電源結合步進電機原理與脈寬調制技術，選用智能功率模塊ipm作為逆變開關器件，輸出交流脈沖勵磁信號，以調節勵磁轉換頻率和勵磁電流大小為手段，實現對磁場旋轉頻率和磁場強度大小的有效調節，並通過閉環反饋實現閉環恆流控制。
  10. Mathematical model for heat and mass transfer of the human dressing - numerical value of the model

    空氣與水逆流直接接觸熱質交換過程模型計算及分析
  11. The constitution, interface and control principle of main circuit, rectifier control module, inverter control module, generator ' s rotor speed and rotor position measuring module, information exchange module are discussed. specially, the methods of implementing signals level match in multi - voltage system, synchronizing with pc in parameters measurement and measuring rotor speed and rotor position with high precision are explained in detail

    文中討論了主電路、整流器控制模塊、逆變器控制模塊、電機轉速和轉子位置測量模塊以及信息交換模塊的組成、介面方法和控制原理，詳細說明了系統中實現不同電壓等級間信號電平匹配的方法、系統與上位機進行同步參數測量的方法以及實現高精度電機轉速和轉子位置測量的方法。
  12. Our factory is according to the needs of customer, still the production is charged and against becomes an organic whole machine, and can being charged and can be against becoming, and netting the electricity at ordinary times often can be charged to the accumulator, the net electricity has stopped afterwards use the accumulator with against becoming, makes the 12 volts direct currents change into the 220 volts alternating currents, for person production and the life brought the convenience

    我廠根據客戶的需要，還生產充電、逆變一體機，既可以充電、也可以逆變，平時網電正常時可以對電瓶充電，網電停了之後可以利用電瓶和逆變，使12伏直流電轉換成220伏交流電，為人門的生產和生活帶來了方便。
  13. This paper put forward the realization method of a kind of multi - function general use inverter system which added other functions based on the independent sine wave inverter, it not only can be used as independent inverter power supply but can be used as an in - support mode ups which realize synchronous with the phase of power grid voltage and realize to switch with power grid mutually, it also can realize three phase ac output by the combination of three synchronous inverters, experiment proved it in this way has a stronger ability of resisting three phase unbalance load

    本文提出了一種基於獨立正弦波逆變器的功能之上復合其他功能而成的多功能通用逆變電源系統的實現方法，此系統不僅可以作為獨立逆變電源使用，還可以與電網電壓的相位同步，作為后備式正弦波ups使用，在逆變電源和電網的相互切換時能做到對負載無影響，同時還可以由三臺逆變器進行組合自同步實現三相對稱交流輸出，實驗證明這種方式具有較強的抗三相不平衡負載的能力。
  14. Model calculation and analysis of heat and mass transfer of air and water in a direct contact forward flow

    空氣與水直接接觸熱質交換順流和逆流過程特性比較
  15. The half - bridge bi - directional current mode hfl inverter can realize dc to ac conversion in only one stage. the half - bridge bi - directional current mode hfl inverter succeeds to the advantages of full - bridge hfl inverter but uses fewer power switches, which reduces the costs of switches " driver circuit

    半橋雙向電流源高頻鏈逆變電路只需一級功率變換即可實現直流到交流的轉換，在繼承全橋高頻鏈逆變電路優點的同時，使用的功率管更少，功率管的減小同時降低了驅動電路的成本。
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