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McNaught, J M, Macdonald equation, for fixed-bed pressure drop, Mach number, Macleod-Sugden method for surface tension Macrolayer consumption model for critical heat flux in pool boiling, Maddox, R N Magnetic fields, effect on properties of rheologically complex materials, Magnetic devices, for fouling mitigation, Magnetohydrodynamcs, inaugmentation of heat transfer in microfluidic systems, Margarine manufacture, crystallization of edible oils and fats in, scraped surface heat exchangers for, Marlotherm, heat transfer media, Martensitic stainless steels, Martin, H Martinelli and Boelter equations for combined free and forced convection, Martinelli and Nelson correlations: Mass absorption coefficient, Mass extinction coefficient, Mass fraction, in multicomponent mixtures, Mass scattering coefficient, Mass transfer: Mass transfer coefficient: Materials of construction, for heat exchangers, Low temperature operation, ASME VIII code guidelines for, Matovosian, Robert, Matrix inversion techniques, in radiative heat transfer, Maximum drag reduction Maximum velocities (in shell-and-tube heat exchangers) Maxwell model, for non-Newtonian fluid, Maxwell-Stefan equations, for multicomponent diffusion, Maxwell's equations, for electromagnetic radiation, Mean beam length concept, in radiative heat transfer: Mean phase content, Mean temperature difference: Measurement of fouling resistance, Mechanical design of heat exchangers: Mechanical draft cooling towers, Mechanical loads, specifications in EN13445, Mechanical vapour compression cycles in refrigeration, Mediatherm, heat transfer medium, Melo, L F, Melting, thermal conduction in, Melting point: Mercury: Merilo correlation, for critical heat flux in horizontal tubes, Merkel's equation, in cooling tower design, Mertz, R, Metais and Eckert diagrams, for regimes of convection: Metals: Metallurgical industry, kilns and furnaces for, Metastable equilibrium, of vapor and liquid, Methane: Methanol: Methyl acetate: Methylacetylene: Methyl acrylate: Methyl amine n-Methylaniline: Methyl benzoate: 2-Methyl-1,3-Butadiene (Isoprene): 2-Methylbutane (isopentane): Methylbutanoate: 2-Methyl-2-butene: Methylcyclohexane: Methylcyclopentane: Methylethylketone: Methyl formate: Metallurgical slag, use of submerged combustion in reprocessing of, Methyl fluorate: 2-Methylhexane: Methylisobutylketone: Methylmercaptan: 1-Methylnaphthalene: 2-Methylnaphthalene: 2-Methylpentane: 3-Methylpentane: 2-Methylpropane (isobutane): 2-Methylpropene: Methyl propionate: Methylpropylether: Methylpropyl ketone: Methyl salicylate: Methyl-t-butyl ether: Microbubbles, for drag reduction, Microchannels (see also microfluidics) Micro-fin tubes: Microfluidics, enhancement of heat transfer in, Mie scattering, in pulverized coal combustion, Miller, C J Miller, E R Mineral oils, as heat transfer media, physical properties of, Mineral wool production, submerged combustion systems for, Minimum fluidization velocity, Minimum heat flux in pool boiling: Minimum tubeside velocity, in shell-and-tube heat exchangers, Minimum velocity for fluidization, Minimum wetting rate, for binary mixtures, Mirror-image concept, in radiative heat transfer, Mirrors, spectral characteristics of reflectance from, Mishkinis, D, Mist flow: Mitigation of fouling, Mixed convection occurrence in horiozntal circular pipe, Metais and Eckert diagram for, Mixing (shell-side), in twisted tube heat exchangers, Mixing length, in turbulent flow, Mixtures: Modelling, of fouling: Models, theory of, Modulus of elasticity: Moffat, R S M, Molecular gas radiation properties, Molecular weight: Mollier chart, for humid air, Momentum equation: Monitoring, on line, of fouling, Monochloroacetic acid: Monte Carlo methods, in radiative heat transfer, Moody chart: Morris, M Mostinski correlations: Moving bed, heat transfer to, Muchowski, E, Mueller, A C Muller-Steinhagen, H Multicomponent mixtures: Multidimensional systems, heat conduction in, Multiflux methods, for radiative heat transfer in nonisothermal gases, Multipass shell-and-tube heat exchangers, Multiphase fluid flow and pressure drop: Multiple duties, in plate heat exchangers, Multiple effect evaporation, Multiple hairpin heat exchanger, Multistage flash evaporation (MSF) Multizone model, for furnaces,
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Properties of Saturated Fluids

DOI 10.1615/hedhme.a.000524

5.5 PHYSICAL PROPERTY DATA TABLES
5.5.1 Properties of saturated fluids

In this section the thermophysical properties of fluids are presented for the two-phase region — that is to say, from the normal boiling point to the critical point. Data are presented wherever possible from internationally recognised sources. THERMODYNAMIC PROPERTIES are often available from an equation of state representing the PVT behaviour of the fluid, and provide a consistent set of interdependent values. Typical compounds are those listed in Section 525. Data for the properties at the saturation temperature can be derived from theoretical relationships. More usually, however, the ideal gas heat capacity and properties of the saturated liquid below the boiling point are taken from the literature and correlated by methods referred to in Section 5.1 (Tables in Section 533 and Section 534) provide data values for a randomly chosen list of compounds.

The most generally reliable procedure for obtaining data for the saturated vapour is by the Lee-Kesler generalised equation of state (Lee and Kesler, 1975). The latent heat of vaporisation can be predicted reliably by the Clausius-Clapeyron equation when good vapour pressure and density data are available (Section 500-4). The liquid enthalpy can then be evaluated at pressures above the normal boiling point by difference from the vapour enthalpy. This is represented graphically in Figure 1. This is the method preferred in this revision as it provides a common basis for estimating mixture data. When liquid enthalpies can be derived by integration of the specific heat capacity they are less reliable at temperatures above the normal boiling point.

Figure 1 Temperature-enthalpy diagram

The TRANSPORT PROPERTIES of many important fluids have been similarly studied, and all such known sources have been consulted. (See Section 537 for specific examples). The properties of liquids can be measured relatively easily, and are well established for many fluids up to temperatures of 0.9Tc. For the saturated vapour, however, few reliable measurements have been made because of inherent experimental difficulties. The generalised procedures of Thodos and co-workers (Jossi et al., 1962; Stiel and Thodos, 1964a; Stiel and Thodos, 1964b) have been used to derive values for the saturated vapour from ideal gas data, using density as the independent variable. Figures on pp. 25 and 27 of Section 526 illustrate the effect of pressure on the properties of steam.

A thorough survey of the liquid viscosity and thermal conductivity of groups of compounds in homologous series has been made by the Engineering Sciences Data Unit over a number of years, and these are used whenever possible. The authors recommend that their equations should not be extrapolated beyond a reduced temperature of 0.9; the tables are therefore limited; in particular liquid thermal conductivity will increase towards the critical point at higher temperatures.

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