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Degrees of freedom of equipment and processes (1994)
| Venue: | Chemical Engineering Science |
| Citations: | 1 - 0 self |
BibTeX
@ARTICLE{Pham94degreesof,
author = {Q. T. Pham},
title = {Degrees of freedom of equipment and processes},
journal = {Chemical Engineering Science},
year = {1994},
pages = {2507--2512}
}
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Abstract
Simple equations are derived to carry out degree of freedom analyses quickly and almost mechanically, using easily countable physical entities. It is shown that the outlet stream freedom does not depend on the number of component substances, and in many cases not on the number of phases. The concept of phase constraint is introduced to facilitate the degree of freedom analysis. 1 A frequent problem facing chemical engineering students, practicing engineers dealing with an unfamiliar process, and persons writing computer process simulations, is that of calculating the number of degrees of freedom of a process. Only when this has been done can the following questions be answered: • How many operating conditions or desired outputs can we specify? In fact, can we specify anything at all or do we have to accept whatever the equipment will give us? • Is the process as described self-maintaining and stable, or does it need feedback
