Nomograph method

Use Eq. (26-65) to determine the maximum concentration. Nomograph Method By defining a scaled length... 

Many computer codes, both public and private, are available to model dense cloud dispersion. A detailed review of these codes, and how they perform relative to actual field test data, is available (Hanna, Chang, and Strimaitis, Atmospheric Environment, vol. 27A, no. 15, 1993, pp. 2265-2285). An interesting result of this review is that a simple nomograph method developed by Britter and McQuaid (1988) matches the available data as well as any of the computer codes. This method will be presented here. 

Biochemists often estimate the total quantity of protein and nucleic acid in an unknown by the nomograph method.1 In this method, the absorbance of the unknown solution in a 1-cm cuvette is measured at 260 and 280 nm. The nomograph (Fig. 1.1) is then used to estimate concentrations. 

A linear equation method and a nomograph method can be used for estimating vapor-liquid equilibria of gasoline from vapor pressure and distillation test results (ASTM D-4814). However, these estimation methods are not applicable to gasoline-oxygenate blends. 

There is much guidance available in the literature regarding explosion relief venting with the nomograph method being, perhaps, the most widely used technique for deriving vent areas. This and other available techniques are considered in detail by Lunn [16] and the NFPA [17]. 

The four basic methods of vent sizing are the Kst Nomograph Method [2], the St Group Nomograph Method [2], the Radandt Nomographs [2] and the Scholl Equation [4], which also is included in VDI3673 [5]. It should be noted that these methods are subject to several... 

Correlation methods discussed include basic mathematical and numerical techniques, and approaches based on reference substances, empirical equations, nomographs, group contributions, linear solvation energy relationships, molecular connectivity indexes, and graph theory. Chemical data correlation foundations in classical, molecular, and statistical thermodynamics are introduced. 

An easy to use nomograph has been developed for the solubility of liquid hydrocarbons in water at ambient conditions (25°C). The accuracy of the nomograph has been checked against available solubility data. Performance of the nomograph has been compared with the predictions given by two available analytical correlations. The nomograph is much simpler to use and far more accurate than either of the analytical methods. 

The equilibrium solubility of common inorganic gases in petroleum liquids can now be estimated by nomograph. The relationship is based on an earlier correlation established by the U.S. National Aeronautics and Space Administration and the subject of a standard method approved by the American Society of Testing and Materials. 

Nomograph defined. This method assumes the application of the Clausius-Clapeyron equation, Henry s law, and... 

Rechen-schieber, -stab, m. slide rule, -stift, m. slate pencil, -tafel, /. reckoning table multiplication table nomograph, nomogram slate blackboard counting board, -ver-fahren, n. method or process of calculation. 

The capital cost of a pipe run increases with diameter, whereas the pumping costs decrease with increasing diameter. The most economic pipe diameter will be the one which gives the lowest annual operating cost. Several authors have published formulae and nomographs for the estimation of the economic pipe diameter, Genereaux (1937), Peters and Timmerhaus (1968) (1991), Nolte (1978) and Capps (1995). Most apply to American practice and costs, but the method used by Peters and Timmerhaus has been modified to take account of UK prices (Anon, 1971). 

Fauske[20,21] has produced nomographs (graphs) for the purpose of relief sizing. That for tempered systems is based on Fauske s sizing method for vapour pressure... 

Figure 25-27 Nomograph showing volume percentage of solvents having the same eluent strength. A vertical line intersects each solvent line at the same eluent strength. For example, 30 vol% acetonitrile/70 vol% water has about the same eluent strength as 40 vol% methanol or 22 vol% tetrahydrofuran. [From l ( . Snyder, J. J. Kirkland, and J. L Giajch, Practiced HPLC Method Development (New York Wiley, 1997).]...

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