Measurements and analysis of time constant of the KRISS dynamic flow control system

Autor:	J. W. Chung, J.Y. Lim, S. Y. Woo, Y.H. Shin, S. S. Hong, Wakil Khan
Rok vydání:	2012
Předmět:	Flow control (data) Materials science Equilibrium time Continuous flow Applied Mathematics Time constant Mechanics Condensed Matter Physics Pressure range Control theory Vacuum chamber Electrical and Electronic Engineering Instrumentation Versa Dynamic equilibrium
Zdroj:	Measurement. 45:2456-2458
ISSN:	0263-2241
DOI:	10.1016/j.measurement.2011.10.049
Popis:	Time constant is an important property of the continuous flow systems that can be used to estimate the dynamic equilibrium time for the reaction vacuum chamber of such systems. This work is concerned with measurements and analysis of time constant of a dynamic flow control system assembled at the KRISS vacuum laboratory. Being a new system, it was important to know some basic characteristics of the system, including the time constant as well, in the pressure range of 0.1–133 Pa during continuous gas flow. Three types of gases were used for this purpose and the results were compared. It was observed that time constant was dependent on pressure across the conductance-reducer (CR) that was installed in the by-pass pumping line of the system. At low upstream pressures, the time constant was large and vice versa.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9ed7cd9f01ea503fdb3cc0b52fb99f20 https://doi.org/10.1016/j.measurement.2011.10.049 Zobrazit plný text záznamu Full Text from ScienceDirect