相變焓 的英文怎麼說
中文拼音 [xiāngbiàn]
相變焓
英文
enthalpy of phase change-
A change in enthalpy also takes place when a change of phase occurs.
相發生變化時，焓也發生變化。The change in enthalpy may be expressed in terms of the specific heats of the phases and the temperature and pressure changes.
熱焓的變化可以表達為各相比熱和溫度壓力的變化。The result shows that all these system are simple eutectic, at the same time, the entropy of phase change of every system in the eutectic point is determined by using differential scanning calorimetry ( dsc ) on the basis of experimental research, through the improved one - parameter margules equation by introducing a new variable temperature, the improved equation was designed to compute solid - liquid equilibrium
測定結果表明，這幾組體系均為簡單低共熔體系；同時利用差熱掃描量熱法（ dsc ）對上面各組體系低共熔點處的相變焓進行了測定。在實驗研究的基礎上，通過改進單參數margules方程並引入新的變量溫度，達到了將此方程用於固液平衡計算的目的。This article choosed out organic phase change materials, and, the solid - liquid - equilibrium of eleven binary system including fatty alcohol / fatty acid, n - octadecane / fatty acid, n - octadecane / fatty alcohol system were determined by cooling curve, and, t - x phase diagrams of these systems were drawn. the result shows that all these systems are simple eutectic, at the same time, the entropy of phase change of every system in the eutectic point is determined by using differential scanning calorimetry ( dsc ). and n - octadecane / fatty acid systems were calculated theoretically
本文初選出部分有機相變貯能材料，採用步冷曲線法測定了12醇-羧酸系列、 18烷-羧酸系列、 18烷- 12醇體系共11組體系的二元固液相平衡關系，繪制了這11組體系的t - x相圖，測定結果表明，這幾組體系均為簡單低共熔體系；同時利用差熱掃描量熱法（ dsc ）對上面各組體系低共熔點處的相變焓進行了測定；並對18烷-羧酸系列進行了熱力學理論預測。At the same time, the conductivity factor and the entropy of phase change of the solidation fatty alcohol were measured separately by using the time - temperature curve and dsc
同時利用時間-溫度曲線法和dsc測定了固化十二醇的導熱系數與相變焓。In order to overcome the difficulty mentioned above, this paper provides an improved heat transfer equation and a mended bem for the problems. first of all, the enthalpy and the " virtual temperature " are introduced into the paper to eliminate several mutative thermophysical properties in the heat transfer equation. secondly, the movement of the boundary between the solid and liquid phases in the billet is educed by virtue of the laplace transform
這些改進包括：引入熱焓和「虛擬溫度」的概念，對非常數的熱物性參數進行整合：充分考慮鑄坯凝固潛熱釋放帶來的影響，利用「溫度回升法」來加以處理；利用拉氏變換和反拉氏變換的原理來對凝固過程中鑄坯內部固液相界面的移動方程進行了推導和求解，在凝固過程中充分考慮鑄坯內部的固液兩相的影響等等。The thermochromism implies a drastic change in color of substance, which take place when it is heated up to a certain temperature or to a more or less well - defined temperature range. accompanying the change of color, materials that undergo temperature - induced color changes are termed thermochromic
熱致變色材料是指顏色或吸收光譜隨溫度變化的一些化合物或混合物，熱色性材料的顏色變化伴隨著焓變，焓變越大，相應的顏色變化也越明顯。The result shows that the new functional material prepared has great value in use and infinite prospect of development potential
結果表明，該新型固態相變材料相變焓較大，具有很好的應用價值和發展前途。The result shows the conductivity factor of organic phase change materials was heightened, the temperature of phase change was changeless, and, the entropy of phase change was reduced after adding these additives
結果表明，加入上述添加物后，有機相變貯能材料體系的導熱系數能有效地提高，相變溫度幾乎沒有改變，相變焓會有所下降。Because of the small conductivity factor of organic phase change materials, all kinds of copper grids, gas sio2 and organic bentonite were added to organic phase change materials in order to heighten its conductivity factor. the conductivity factors were maesured by using time - temperature curve and comparison curve, and, the conductivity factor curves were drawn. at the same time, the entropy of phase change of every system was determined by using dsc
針對有機相變貯能材料導熱系數小的缺點，採取在其中添加各種形狀的銅網格、氣相sio _ 2和有機膨潤土的方法來改善體系的導熱性能，利用時間-溫度曲線法和比較法兩種方法測定體系的導熱系數，並且繪制了體系導熱系數的變化曲線；同時利用dsc對上面部分體系的相變焓進行了測定。分享友人