Constraint test

The second section of the spreadsheet contains the overall flows, the calculated component flows, and the material balance closure of each. The weighted nonclosure can be calculated using the random error calculated above, and a constraint test can be done with each component constraint if desired. Whether the measurement test is done or not, the nonclosure of the material balance for each component gives an indication of the validity of the overall flows and the compositions. If particiilar components are found to have significant constraint error, discussions with laboratory personnel about sampling and analysis and with instrument personnel about flow-measurement errors can take place before any extensive computations begin. 

There are three principal categories of rec tification tests according to Mah Chemical Process Structures and Infoimation Flows, Butter-worths, Boston, 1989, p. 414). These are the global test, the constraint test (nodal test), and the measurement test. There are variations published in the literature, and the reader is referred to the references for discussion of those. 

Constraint Test In this test, each individual constraint is tested based on the measurements. The test statistic is... 

This statistic is normal. As with the global test, the constraint test is based on the actual measurements before reconciliation. Reconciliation is not required in advance of the application of this test. Also, the... 

All tests on energetics were conducted in the 12 kW plant. The Comp B was not tested owing to schedule constraints. Tests on M28 propellant successfully demonstrated high DREs of nitrocellulose (99.9999 percent) and nitroglycerine (99.99999 percent) and very high electrochemical efficiency (80 to 100 percent). More than 159 kg of M28 were treated in 8 days of operation. 

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