蒸發系數 的英文怎麼說

中文拼音 [zhēngfāxìshǔ]
蒸發系數 英文
coefficient of evaporation
  • 蒸 : Ⅰ動詞1. （蒸發） evaporate2. （利用水蒸氣的熱力使食物熟或熱） steam Ⅱ名詞[中醫] （將藥物隔水蒸熟） steaming
  • 發 : 名詞（頭發） hair
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 蒸發 : [物理學] [化學] evaporation; evaporate蒸發計 evaporometer; evaporimeter; atmidometer; atmometer; ...
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet - parameter on evaporator. fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio - parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping

    本文的主要內容如下： 1 ）對翅片管蒸發器結構特點進行分析，選取適當的微元控制體，就干、濕和霜工況下對每個微元分別進行傳熱傳質分析，基於經驗關系式確定霜的有關參數，對于霜工況下的霜生長建立模型，經適當假設，運用質量守恆、能量守恆和動量守恆方程建立適合動態模擬的蒸發器數學模型，為系統模擬奠定基礎； 2 ）對蒸發在大擾動下的開、停機過程，運用動態集中參數模型進行分析和計算，為更好地描述製冷系統運行的全過程奠定基礎，同時也為製冷系統實現自動控制提供一定的理論基礎； 3 ）對蒸發器正常運行過程，運用動態分佈參數和參數間定量耦合的觀點來分析和計算，為更好地了解穩態工況下各點參數的變化情況及各入口參數對蒸發器動態特性的影響即蒸發器性能對各參數變化的敏感性； 4 ）編寫翅片管蒸發器動態特性模擬計算程序，可以計算不同邊界條件和初始條件下的製冷劑熱力參數、空氣溫濕度和霜厚度分佈場，實現對翅片管蒸發器在干、濕和霜工況下的動態模擬。
  2. This paper researches diathermancy and fluidity of condenser, evaporator, compressor, and capillary in detail. maths models of condenser, evaporator, compressor, and capillary are established and model predigesting and modifying methods are done methods are given in this paper, which can transfer the practical system into the simulating system. in the basis of refrigerating system character, components models are modified in the system administrative levels

    本文詳細研究了蒸發器、冷凝器、壓縮機和毛細管的傳熱特性和流動特性，建立和發展了蒸發器、冷凝器、壓縮機和毛細管數學模型，並進行了相應的模型簡化和修正方法研究，建立了從實際系統到模擬系統的轉換方法；本文針對各製冷系統的特點，在系統層次上進行了部件模型的修正研究，建立了相應的修正模型和演算法。
  3. It has an effective, logarithmic relationship between net primary production of climax vegetation and evapotranspiration.

    它在頂極植被凈第一性生產量與實際蒸發量之間有一個有效的對數關系。
  4. Observation experiment and analysis calculation on phreatic water evaporation coefficient

    潛水蒸發系數的觀測實驗與分析計算
  5. Suction gas pressure goes up as the compressor run at the lower speed in the lower burthen, and this is beneficial to lower systems energy - consume. when the system is controlled by wvf, the discharge change of the evaporator is not linear ; the electronic expansion valve is adopted to regulate the system superheat degree, and the controlled object is parameter time varying, accordingly, the time varying controller should be adopted

    在負荷較小時，壓縮機採用低速運轉，吸氣壓力升高，這對系統降低能耗是有利的；變頻控制時，蒸發器製冷劑流量的變化並非線性；系統中採用電子膨脹閥進行過熱度控制，被控對象具有參數時變的特性，相應地宜採用變結構的控制器。
  6. The results indicate that the qualitative behavior in this process is similar to that observed in condensation of vapor at or above atmosphere pressure, the coefficient of heat transfer for condensation in tube, the coefficient of heat transfer in total increase with the increasing of heat flux density and vapor pressure. however, heat flux density and vapor pressure have a more significant effect on them

    發現水平管內低壓蒸汽冷凝過程與常壓條件下蒸汽冷凝過程相同，管內冷凝傳熱膜系數、總傳熱系數隨熱流密度、蒸汽壓力的增大而增大，但熱流密度、蒸汽壓力對低壓蒸汽冷凝有著更為顯著的影響，管外冷卻水流量對其影響並不明顯。
  7. In the condition of same condensation temperature and evaporating temperature, the cop of the basic gax cycle is lower than that of the simplicity cascade cycle, but it is greatly better than the mid - pressure double - effect cascade cycle, on the other hand, the work condition is not as rigor as the simplicity cascade cycle, so the ratio of performance and cost is relatively high

    在相同的冷凝溫度和蒸發溫度下，基本gax循環的性能系數（ cop ）雖然比單純復疊循環的低，但要遠遠優于中壓雙效復疊循環，而且運行的條件不象單純復疊循環那樣苛刻，故基本gax循環的性價比較高。
  8. Eev should be selected for various refrigeration systems according to the thermal properties of refrigerants ; the discharge coefficient of eev is sensitive to the aperture and impulse quantity of eev ; when the eev structure is made, the discharge coefficient goes up with the lowering of evaporation temperature or goes down with the hoisting of the condensation temperature. it is le

    對于不同工質的冷藏集裝箱製冷系統，電子膨脹閥應該根據具體製冷劑的熱力性質選取；電子膨脹閥流量系數對孔徑和脈沖數比較敏感；在結構固定時，流量系數隨蒸發溫度的降低而升高，隨冷凝溫度的增加而增大，受過冷度變化的影響較小；電子膨脹閥的容量受孔徑影響最大。
  9. And experimental study on the heat transfer performance and pressure drop characteristic of the process of bubbling evaporative cooling are carried. as there are so little attention and studies on the process bubbling evaporative cooling about heat transfer in the world at present, this paper mainly deals with the effects of the different bare tower velocity, weir height, heat flux density and plate perforation geometries on the heat transfer coefficient and the pressure drop of the process of air flowing

    由於目前國內外對鼓泡蒸發冷卻過程在換熱方面的關注和研究較少，本文對不同空塔速度、不同堰高、不同熱流密度、多孔板的不同幾何尺寸對換熱系數及空氣流動過程阻力的影響進行了實驗研究及理論分析，總結了本實驗條件下換熱及阻力的實驗關聯式。
  10. C ) the evaporation temperature has negligible effect on the average evaporation heat transfer coefficient at the same oil concentration

    C ）同一含油率下，蒸發溫度對平均換熱系數影響不大。
  11. According to the result of analysis, it is advisable to invoke the general evaporation model should the avoidance of the overestimation on the strain energy release rate for very thin package cases be desired

    此外，計算結果還顯示：影響「爆米花」式斷裂的主要可控因素是擴散系數d 。和蒸發系數f卜其中，蒸發系數f 。
  12. Including irrigation time, frequency, and quantity of water, of which based on the evapotranspiration rate and crop coefficients in different months and the rank of visual appearance of different date

    根據草坪質量與土壤含水量、土壤水勢的相關性及作物系數、蒸發量等參數，準確計量其灌水時間、灌水量和灌水頻率。
  13. With the viewpoint of dynamic and distributed parameters and parameters qualitatively coupled, computing modules of evaporator, gascooler, internal exchanger are programmed. in addition throttling valve and compressor are programmed. following are the main points of this thesis

    本文從製冷系統模擬的角度，用動態分佈參數及參數間定量耦合的觀點考察了蒸發器、氣體冷卻器和回熱器，編制了各個部件相應的計算程序。
  14. 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。
  15. The evapration of water area is calculated by et0 multiplied by kc ; and then the evapotranspiration estimation models for other categories ( singular underling surface ) are presented ; based on bare soil and dense grass models the evapotranspiration estimation models for partly grass covered surface is presented combined with vegetation fraction data. it is feasible and logical each categories using singular way and mean, the result of regional evapotranspiration over south ningxia is given

    將水體單獨處理，由參考作物蒸散乘以比例系數直接計算得出水體蒸發；建立了4種單一類型下墊面（裸地區、草地完全覆蓋區、喬木林區、灌叢區）蒸散計算模型；對混合下墊面（草地?裸地區）區域蒸發（散）計算方法使用裸土和草地完全覆蓋蒸發（散）計算模型，然後結合植被覆蓋度給出。
  16. Alkali recovery is an effective way dealing with the black - liquor in pulp mill. black - liquor evaporation and combustion in, alkali recovery are complicated industrial processes. they have characteristics such as strong coupling, non - linearity, large time delay, parameter examining difficulty, etc. and people require more effective control system for the processes "

    堿回收是紙廠處理黑液的有效方法，造紙堿回收過程中的燃燒和蒸發工段是復雜的工業過程，具有復雜性、非線性、大時滯和參數檢測困難等特點，而且人們對于控制系統的控制性能也提出越來越高的要求，常規控制技術已經沒有辦法滿足生產的需要。
  17. A linear relation can be found between response value of ultraviolet absorption detector, fluorescence detector, electrochemical detector and refractive index detector and quality of the object under test ; however, relation between response value of evaporative light - scattering detector and quality of the object under test is usually not a linear one, therefore, mathematical conversion of response value should be made before making calculation when necessary

    紫外、熒光、電化學和示差折光檢測器的響應值與待測物的質量呈線性關系，但蒸發光散射檢測器響應值與待測物的質量通常並不呈線性關系，必要時需對響應值進行數學轉換后進行計算。
  18. Another important conclusion the present study reached is that the controlling of diffusion coefficient do and evaporation coefficient f0 is efficient for the deduction of the possibility of the " popcorn " delaminations, in specific with controlling evaporation coefficient

    對裂尖能量釋放率的影響較大，因此，控制擴散系數do和蒸發系數f 。能有效地降低電子元件發生「爆米花」式脫層斷裂的可能性，尤其是控制蒸發系數f 。
  19. Further study is in < wp = 6 > demand. moreover, with a transient simulation, we calculated evaporation coefficients of argon under non - equilibrium conditions. the rudimental md results indicate that there is no notable difference between the evaporation coefficients from the non - equilibrium simulation and the condensation coefficients from the equilibrium simulation

    論文還採用瞬態法研究了非平衡條件下氬的蒸發系數，模擬研究的初步結果顯示，非平衡分子動力學方法獲得的蒸發系數與平衡分子動力學方法獲得的凝結系數之間差距並不顯著，由於可比數據少，上述結果還有待于更多的模擬驗證。
  20. The experimental results of the condensation coefficient obtained from the liquid and vapor temperatures near the interface and the results from md simulations are in the same order, but those obtained from the bulk liquid and bulk vapor temperatures are four to five orders lower than the results from md simulations

    採用準穩態方法對水的蒸發過程進行了實驗研究。研究表明，使用界面溫度獲得的蒸發系數實驗結果與分子模擬獲得的凝結系數差距不大，但採用主流區溫度獲得的蒸發系數與模擬計算結果相差可達4 ~ 5個量級。
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