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Energy balance method

Eor saturated surfaces, the Bowen ratio can then be used to calculate evapotranspiration as a residual of the surface energy balance (Penman, 1948). Since direct measurement of ET is difficult and expensive, the energy balance method is fairly common. [Pg.125]

The accuracy of the energy balance method for discharge of flashing liquids through orifices and horizontal pipes is illustrated in Figs. 23-42 and 23-43. The ratio of predicted to observed mass flux is plotted for saturated water data by Uchaida and Narai and by Sozzi and... [Pg.61]

Sutherland (1975). Orifice flow rates are underpredicted by about the same factor with the energy balance method and with the NEM. Discharge predictions for short (0.2-m) pipes are overpredicted by the energy balance method. In this region, the assumption of homogeneous equilibrium is not justified. A model that takes slip velocity into account may improve predictions for short pipes. [Pg.61]

FIG. 23-43 Accuracy of energy balance method for flashing liquid discharge through orifices and horizontal pipes. [Pg.62]

FIG. 23-42 Accuracy of energy balance method compared with saturated water data by Uchaida and Narai. [Pg.62]

Next, we develop the finite difference formulation of heat conduction problems by replacing the derivatives in the differential equations by differences. In the following section we do it using the energy balance method, which does not require any knowledge of differential equations. [Pg.309]

S-3C What is the basis of the energy balance method How does it differ from the formal finite difference method For a specified nodal network, will these hvo methods result in the same or a different set of equations ... [Pg.353]

JlC Explain how the finite difference form of a heat conduction problem is obtained by the energy balance method. [Pg.354]

Mixing Measurement Using Thermal Energy Balance Method.246... [Pg.241]

OFA, and FGR. The thermal energy balance method is the simplest way to determine the effectiveness of mixing. Under the steady-state condition, the temperature of the mixture is a function of the temperature and mass fraction of each individual stream. [Pg.246]

The purpose of this article is to describe the theory of the H2 0 method, its assumptions, the analytical procedures and equations used in its calculation, and its validity compared to the energy balance method and indirect calorimetry when measuring the total energy expenditure (TEE) of humans. [Pg.172]

Wong, W. W Butte, N. F., Garza, C., and Klein, P. D. (1990). Comparison of energy expenditure estimated in healthy infants using the doubly labelled water and energy balance methods. Eur. J. Clin. Nutr. 44, 175-184. [Pg.180]

One advantage of the energy balance method is that influence of pre-stresses or residual stresses can easily be studied. These stresses increase the stored elastic energy, hence the available energy for crack propagation they reduce the quasistatic force of adherence. This point has been theoretically and experimentally shown by Kendall for peeling (18) when an elastic strip (thickness h, width b) is stretched to e = dL/L before placed on a rigid... [Pg.71]

With regard to liquid flow the results of the more sophisticated models have not yet been fully incorporated in BCR modelling. It is particularly believed that the circulation cell model derived by Joshi and Sharma [15] on the basis of the energy balance method will stimulate BCR modelling. Cell models are very flexible and can easily be adapted to various flow patterns. Two examples are given in Fig. 14 and 15. [Pg.449]

The energy balance method for analysing adhesion failure goes back at least to Galileo who described the basic principle in his book Two Sciences published almost 400 years ago [1], Fig. 1 shows part of his diagram which depicts adhesive failure of the cellulose fibres in a wooden beam loaded by a force applied to its free end. [Pg.77]


See other pages where Energy balance method is mentioned: [Pg.75]    [Pg.55]    [Pg.58]    [Pg.309]    [Pg.311]    [Pg.2504]    [Pg.2557]    [Pg.2560]    [Pg.247]    [Pg.2484]    [Pg.2537]    [Pg.2540]    [Pg.39]   
See also in sourсe #XX -- [ Pg.292 , Pg.293 , Pg.294 , Pg.295 , Pg.296 , Pg.297 , Pg.298 , Pg.299 , Pg.300 ]

See also in sourсe #XX -- [ Pg.77 ]

See also in sourсe #XX -- [ Pg.327 , Pg.328 ]




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