ASTM D2890-92(2003)
(Test Method)Standard Test Method for Calculation of Liquid Heat Capacity of Petroleum Distillate Fuels
Standard Test Method for Calculation of Liquid Heat Capacity of Petroleum Distillate Fuels
SIGNIFICANCE AND USE
Heat capacities obtained by this method are those at atmospheric pressure. However, because the temperature range is low, the calculated values are similar to saturated liquid heat capacities in the temperature-pressure range required for most engineering design.
SCOPE
1.1 This test method describes the calculation of liquid heat capacity, Btu/lb · °F (kJ/kg K), at atmospheric pressure, of petroleum fuels for which distillation data may be obtained in accordance with Test Method D 86 without reaching a decomposition point prior to obtaining 90 volume % distilled.
1.2 This test method is not applicable at temperatures less than 0°F (-18°C) and greater than 60°F (16°C) above the volumetric average boiling point of the fuel.
1.3 The values stated in inch-pound units are the preferred units. The values in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.
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An American National Standard
Designation:D2890–92(Reapproved 2003)
Standard Test Method for
Calculation of Liquid Heat Capacity of Petroleum Distillate
Fuels
This standard is issued under the fixed designation D2890; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This test method describes the calculation of liquid heat 4.1 Heat capacities obtained by this method are those at
capacity, Btu/lb·°F (kJ/kg·K), at atmospheric pressure, of atmosphericpressure.However,becausethetemperaturerange
petroleum fuels for which distillation data may be obtained in is low, the calculated values are similar to saturated liquid heat
accordance with Test Method D86 without reaching a decom- capacities in the temperature-pressure range required for most
position point prior to obtaining 90 volume% distilled. engineering design.
1.2 This test method is not applicable at temperatures less
5. Data Requirements
than 0°F (−18°C) and greater than 60°F (16°C) above the
5.1 Distillationtemperaturesat(in°F)10,30,50,70,and90
volumetric average boiling point of the fuel.
1.3 The values stated in inch-pound units are the preferred volume% distilled obtained in accordance with Test Method
D86.
units. The values in parentheses are for information only.
1.4 This standard does not purport to address all of the 5.2 APIgravitydeterminedinaccordancewithTestMethod
D287 or a method of equivalent accuracy.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Procedure
priate safety and health practices and determine the applica-
6.1 Calculate to the nearest 0.1 unit the slope of the Test
bility of regulatory limitations prior to use.
MethodD86distillationcurve,°F/volume%,asthedifference
2. Referenced Documents
between the 10 and 90 volume% distilled temperatures di-
2.1 ASTM Standards: vided by 80.
D86 Test Method for Distillation of Petroleum Products at 6.2 Calculate to the nearest 1°F the volumetric average
boiling point (VABP) as the sum of Test Method D86 10, 30,
Atmospheric Pressure
D287 TestMethodforAPIGravityofCrudePetroleumand 50, 70, and 90 volume% distilled temperatures divided by 5.
6.3 Obtain a temperature correction to the nearest 1°F from
Petroleum Products (Hydrometer Method)
Fig.1,usingtheslopeandVABPcalculatedinaccordancewith
3. Summary of Test Method
6.1 and 6.2. Calculate the mean average boiling point (Me-
3.1 The Watson characterization factor, K, is obtained from ABP) as the VABP plus the correction.
a graphical correlation relating determined Test Method D86 6.4 Obtain to the nearest 0.1 unit the Watson characteriza-
distillation data and K. The liquid heat capacity is obtained, tion factor, K, from Fig. 2 using the determined API gravity
eithergraphicallyormathematically,fromcorrelationsrelating and calculated MeABP.
calculated heat capacity, temperature at which heat capacity is 6.5 Obtain the calculated heat capacity at each specified
being calculated, determined API gravity, and K. temperature, either graphically from Fig. 3 or by solving the
following equation.
NOTE 1—Details of the method have been published.
C 5 @0.6811 20.308 G 1 ~0.000815 20.000306 G!T#
p
~0.055 K 10.35! (1)
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
where:
D02.04 on Hydrocarbon Analysis.
C = heat capacity, Btu/lb·°F,
p
Current edition approved May 10, 2003. Published July 2003. Originally
G = specific gravity,
approved in 1970. Last previous edition approved in 1996 as D2890–92 (1996).
2 T = temperature, °F, and
Annual Book of ASTM Standards, Vol 05.01.
K = Watson characterization factor.
Technical Data Book-Petroleum Refining, Chapter 7, American Petroleum
Institute, Division of Refining, 1220 L St. NW, Washington, DC 20005.
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