Document Name: ASTM D Standard Practice for Calculating Heat CFR Section(s): Standards Body: Value, Compressibility Factor, and Relative Density. 1 Apr ASTM D(). Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels. standard. 1 Apr Purchase your copy of ASTM D – 98() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards.
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C, carbon; H, hydrogen; S, sulfur; 0, oxygen 3. Hence, combining Eq 19 and Eq 20 gives: NOTE 3-It is essential to include all components in the gas sample that appear with mole fractions greater than or equal to 0. Water carried by wet gas spectator water does not actually condense, and only water formed in the reaction contributes to heating value.
DSased upon ideal reaction;] the entry for water represents the iotal enthalpy of vaporization. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Criminal penalties may apply for noncompliance. The values for the pure gases appear in GPA Standardwhich is revised annually.
The SI units given in parentheses are for information only. Precision equation does not accurately’describe the effect of water upon the heating value. Summary of Practice 4. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If the compositional analysis determines x. Conversion to another temperature is more complicated. This is simply a matter of evaluating the integral: The second virial coefficients are flIDctibns of temperature.
It is not possible, at The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. The equations for calculating the properties of dry natural gas are well known, but this appendix also presents an account of the effects of water contained in the.
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ASTM D – PDF Free Download
Methods of Analysis’ 6. Significance and Use 5.
It is obvious that all of the reaction water actually cannot condense because in a situation in which both gas and air are dry some of the reaction water saturates the product gases and the remainder condenses. All three custody transfer properties heating value, compressibility factor, and relative density can be calculated from the composition aastm pure component property tables.
Originally published as D – Table 1, ideal gas values. Any digits carried beyond 1 part in’ lOQO are not significant but only allieviateroundoff error.
ASTM D3588 – 98(2017)
Hv is slightly different from HV id because the base pressure is low; the likelihood of having all the information required to use Eq X3. Special treatmeI “t is not required for H2 and He at mole fractions up to 0. For saturated gas kg is tmity. Asym we have seen, the cost equation is unchanged; the calculations while obvious are tedious. A nwnber in parentheses indicates the year of last reapproval.
M is the molar mass of therpixture,i:: Nonmandatory InformationXl. Historical Version s – view previous versions of standard. The,following tyst methods are applicable to this’ pr. The precision of the method is related to the repeatability and reproducibility of the analysis. If the gross heating value has a volumetric rather than a mass or molar basis, a base pressure must also be specified. If we assume that the water formed in the reaction remains in the ideal gas state, the heating value is termed “net.
Sstm to Active This link will always route to the current Active version of the standard. Remember me Forgot password? The SI units given in parentheses are for information only. It is possible to account for these effects in a general manner. Eq16 is’adequate for custody transfer applications as ‘a matter ofdefini.
The heating value is, therefore,’ an ideal gas property that can zstm calculated unambiguously from tables of pure component values and it has no pressure dependence.
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