Calculation basis

When calculating the primitive ROI, it s best to establish a criterion. For example, one acceptable ROI calculation is to take an average benefit over 3 to 5 years and divide that by the initial cost to the investment. Another calculation basis, used by the U.S. DOE (Department of Energy) for P2 assessments is as follows ... 

A simplified estimate can be made by first converting the flow at actual conditions to the flow at standard conditions (i.e., at 70 F and 1 atm). The calculation basis for the linear velocity assumes a roughness coefficient of 0.0005 and a kinematic viscosity for air of 1.62 x lO fF/sec. From the ideal gas law, the following expression is developed ... 

Alternate Calculation Basis for Piping System Friction Head Loss Liquids... 

The considerable gain in sensitivity with NPP compared with sampled DC polarography can be shown still more clearly on a calculative basis. Thus for a reversible process A 4- ne B and for a solution with ox only, we obtain from eqn. 3.50 by substituting P = exp(nF/RT) (E - El) the equation... 

When the best catalyst has been chosen and found to fulfil the requirements with respect to activity, strength, pressure drop, production and profitability, a procedure must be developed for calculation of the catalyst volume required to obtain a given SO2 conversion in an industrial reactor. In its simplest form, the calculation basis can be a table or an expression for space velocity (NHSV) as a function of feed gas properties and final conversion. A more detailed approach is used for design of catalytic reactors at Haldor Topsoe, where a rate expression of the form... 

Now because atmospheric air is a low pressure gas (< 10 atm), we can assume that it will behave as an ideal gas and that its mole % is equivalent to its volume %. We also shall simplify our solution by assuming a calculation basis of 100 lb mols of air. With these assumption, the molecular weight of air is developed in the following table by working from left to right. 

Specification of theoretical model normally comprises two parts, separated by i.e., type of calculation/basis set... 

The presentation of the calculation basis shows that the new business model can be realised successfully if total costs are reduced. 

Example calculation. The previous example of a typical crude containing 10% produced saltwater contained 70 pptb for 0.1% RS W and 140 pptb for 0.2% BS W. And each barrel of remnant water contained 70 pounds of NaCl (equivalent). To dilute this concentration enough to market a 10 pptb crude oil, then the following calculations will determine the amount of dilution water required for a com-jurison of cases A and B—single stage electrostatic and mechanical separation, respectively, Table 2. The calculation basis is 1.000 barrels net oil and the systems in Fig. 2 arc ass limed. 

Pople and co-workers67 have investigated the interaction of H2 with several simple Lewis acids, including BHa+, and have calculated the energies for several different symmetries in the case of BH4+. All bound states were found to be of C2V symmetry, although the molecule has also been predicted to be square planar. The authors conclude that the latter symmetry should dissociate into BH2++H2, and that BH4+ should be observable only at low temperatures. In this series of calculations, basis sets of up to 6-31G have been used the asterisk refers to the fact that /-orbitals, and in some cases p-orbitals, on H are included. 

An MP2 single-point calculation (basis depending on the particular CBS method)... 

HBS has also been studied by Thomson.409 In both sets of calculations, basis sets of BA + P quality were used. Computed bond lengths were in good agreement with experiment, and in both cases a large number of one-electron properties were computed, and these stand as predictions.409... 

If we had chosen a basis of calculation other than an actual stream amount or how rate, we would Interactive scale the process from the calculated basis value to the actual value of this variable. Since in... 

However, despite the simplicity of this definition, the quantitative assessment of Q is not so obvious. Sheldon s original proposal to arbitrarily assign to any substance a Q value relative to that of NaCl, which is set to 1, does not fully solve the problem. This has been followed by a few papers dealing with this problem [10]. However, the methods proposed suffer from a difficult calculation basis and therefore are not... 

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