In the big vacuum freeze-drying equipment, the drying rate of materials is uneven at different positions. This phenomenon can be explained by the uneven distribution of vapor pressure in chamber during the freeze-drying process. In this paper, a mathematical model is developed to describe the ...
pressure动— 施压动 查看其他译文 © Linguee 词典, 2024 ▾ 外部资源(未审查的) I.e. the relative humidity is simply the ratio of actualvapor pressuretothe saturationvapor pressureatagiven temperature. help.emd.dk help.emd.dk 即在给定 温度下,相对湿度是实际蒸汽压力与饱和蒸汽压力之比。
Water vapor from the atmosphere is absorbed onto the surfaces in the vacuum system and all this has to be pumped out. To put it into perspective, we can look at a single drop of water as an example. 1 drop of water of 1 g=1 ml but at a pressure of 0.133 Pa (0.0013 mbar, 1 ...
The saturation vapor pressure is the pressure of vapor when it is in equilibrium with the liquid phase. From: Optics and Lasers in Engineering, 2019 About this pageSet alert Contents Definition Chapters and Articles Related Terms Recommended Publications Chapters and Articles You might find these cha...
and the value of the section of the transfer tubes or ducts makes up 9 to 12% of the value of the section of the respective partial condenser.;EFFECT: prevented formation of air locks in vacuum in the device for water vapor condensation, worsening of heat exchange, rise of pressure, accel...
where µA liquid =µA vapor are the chemical potentials of liquid and vapor at T and p . If the temperature is changed infinitesimally to T + dT , and the pressure produced by A changes accordingly to p + dp in order to maintain equilibrium between the two phases, then at ...
SOURCES OF WATER VAPOR IN VACUUM SYSTEMS It’s a well known and generally accepted fact that the residual gases during a pumpdown are dominated by water vapor when pumping down to a process dictated ultimate pressure in the high vacuum region. It often seems as though this condition is merely...
The substrate is vacuum vapor coated with a metal having a high vapor pressure at its melting point so that it tends to sublime by evaporating the coating metal from a binary alloy of the coating metal and a second metal, the alloy having a melting point lower than that of the coating me...
The cell was then placed on the vacuum manifold and the whole mixture was then thoroughly frozen degassed. After degassing the cell was set communicated to the pressure gauge and was allowed to reach the working temperature. The static equi- librium between the liquid and vapor phases was ...
the greater the probability that the substance is in the gaseous state rather than the condensed phase (liquid or solid). The vapor pressure of a substance increases with increasing temperature. The boiling point is reached when the vapor pressure is equal to the total pressure of the surrounding...