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Temperature interval method

Example 4.30 Pinch analysis by temperature interval method and grand composite curve Table 4.23 shows hot and cold streams. [Pg.257]

Table 4.24 Temperature interval method for an approach temperature of 10°C... Table 4.24 Temperature interval method for an approach temperature of 10°C...
Carry out the temperature-interval method to locate the pinch temperatures and the minimum hot and cold utility loads. [Pg.357]

The temperature-interval method can also be used to produce grand composite curves, which show the variation of heat supply and demand in a system. These diagrams enable engineers to minimize the expensive utilities, network area, and number of heat exchanger units. [Pg.236]

Numerous procedures have been developed for graphical differentiation. A particularly convenient one (9), which we call the chord-area method, is illustrated using the same data (from Table A.2) to which we previously apphed numerical differentiation. It is clear from Figure A.2 that if we choose a sufficiently small temperature interval, then the slope at the center of that interval will be given approximately by A /Af. In this example, with an interval of 5°C, the approximation is good. Then we proceed to tabulate values of A °/At from 0°C, as illustrated in Table A.6 for the first few data. Note that values of are placed between the values of to which they refer, and the temperature intervals (5°C) are indicated between their extremities. Similarly, as L%°jis an average value (for example, —0.000484) within a particular region (such as 0°C to 5°C), values in the fifth column also are placed between the initial and the final temperatures to which they refer. [Pg.541]

This method was also employed by Chu et al. 2 2) who investigated the effects of long range correlation for a critical mixture of polystyrene in cyclohexane at small temperature intervals from the phase seperation temperature. [Pg.50]

The first method used a Pauling-Erdeli-Pauling thermobalance at temperature intervals between 20° and 700°C in an inert medium. The temperature was raised 12.4°C per minute, the results being compared with those of the standard polymer. With a Fe3+ complex synthesized for 96 hours, the polychelate reached a maximum loss of only 28 at 440°C and often showed a constant thermal stability. Unmodified polyethylene terephthalate continually lost weight showing a loss of 95.9 at 577°C. [Pg.103]


See other pages where Temperature interval method is mentioned: [Pg.248]    [Pg.307]    [Pg.307]    [Pg.312]    [Pg.789]    [Pg.248]    [Pg.307]    [Pg.307]    [Pg.312]    [Pg.789]    [Pg.174]    [Pg.314]    [Pg.34]    [Pg.162]    [Pg.510]    [Pg.102]    [Pg.102]    [Pg.423]    [Pg.439]    [Pg.260]    [Pg.365]    [Pg.517]    [Pg.281]    [Pg.192]    [Pg.503]    [Pg.22]    [Pg.140]    [Pg.311]    [Pg.34]    [Pg.510]    [Pg.525]    [Pg.183]    [Pg.342]    [Pg.265]    [Pg.979]    [Pg.41]    [Pg.104]    [Pg.146]    [Pg.228]    [Pg.30]    [Pg.93]    [Pg.85]   
See also in sourсe #XX -- [ Pg.257 ]

See also in sourсe #XX -- [ Pg.244 , Pg.247 ]

See also in sourсe #XX -- [ Pg.257 ]




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Pinch analysis by temperature interval method and grand composite curve

Temperature-Interval (TI) Method

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