1.1 本试验方法包括根据燃料密度和硫、水和灰分含量，以国际单位制（单位:兆焦/千克）估算碳氢燃料和混合燃料的总燃烧热和净燃烧热。 1.1.1 本试验方法不适用于含有非碳氢化合物的燃料，例如醇类（例如乙醇、甲醇）、醚类（例如MTBE）或酯类（例如生物柴油）。 注1: 该方法中使用的净燃烧热和总燃烧热估算公式最初发布为NBS杂项出版物第97号。 1.2 本试验方法特别适用于使用最少试验次数估算燃烧器和柴油（不含非甲烷燃料）的燃烧热- 碳氢化合物组分），对于这些组分，获得非常精确的热测定通常并不关键。 注2: 航空燃料有更精确的估算方法（测试方法 D1405 , D4529 和 D3338 ). 然而，这些估算方法需要对本测试方法中要求的方法进行额外测试。 1.3 这种测试方法纯粹是经验的( 注1 ). 它是使用常规原油通过正常精炼过程生产的液态烃燃料衍生的，符合中所述石油燃料规范的要求 附注3 . 本试验方法适用于密度范围为750 kg/m的燃料 3. 至1000千克/米 3. 以及那些不含异常高芳香成分的产品。高芳烃含量的燃料通常不符合某些燃料规范标准。 注3: 只有当碳氢燃料属于定义明确的类别时，才有理由根据其密度和硫、水和灰分含量估算碳氢燃料的燃烧热，这些类别的代表性样品的精确实验测量得出了这些数量之间的关系。即使在这些类别中，也应认识到个别燃料的估计可能存在误差。本试验方法已针对油砂沥青和页岩油来源的少量燃料进行了试验，并被证明是有效的。 用于建立本试验方法中相关性的燃料类别由以下应用表示: 燃料（不适用于任何含有非烃成分的燃料） 规格 燃料油 1、2、4（轻）、4、5（轻）、5（重）和6级 D396页 柴油机 1-D、2-D和4-D级 D975 航空涡轮机 喷嘴A和喷嘴A-1 D1655 喷气式飞机B D6615 燃气轮机 等级0-GT、1-GT、2-GT、3-GT和4-GT D2880 煤油 1-K和2-K级 D3699 1.4 本试验方法不适用于纯碳氢化合物。它不打算代替燃烧热的高精度实验测量( 附注4 ). 注4: 试验方法中描述了试验测定总燃烧热和净燃烧热的程序 D240 和 D4809 . 1.5 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 4.1 本试验方法适用于燃烧热的实验测定不可用且无法方便地进行的情况，以及估计值令人满意的情况。 它不打算代替燃烧热的实验测量。

1.1 This test method covers the estimation of the gross and net heat of combustion in SI units, megajoules per kilogram, of hydrocarbon fuels and blendstocks from the fuel density and sulfur, water, and ash contents. 1.1.1 This test method is not applicable to fuels containing non-hydrocarbons such as alcohols (for example, ethanol, methanol), ethers (for example, MTBE), or esters (for example, biodiesel). Note 1: The equation for estimation of net and gross heat of combustion used in this method was originally published as NBS Miscellaneous Publication No. 97. 1.2 This test method is especially useful for estimating, using a minimum number of tests, the heat of combustion of burner and diesel fuels (which do not contain non-hydrocarbon components) for which it is not usually critical to obtain very precise heat determinations. Note 2: More accurate estimation methods are available for aviation fuels (Test Methods D1405 , D4529 ,and D3338 ). However, those estimation methods require additional tests to those required in this test method. 1.3 This test method is purely empirical ( Note 1 ). It was derived using liquid hydrocarbon fuels produced by normal refining processes from conventional crude oil that conform to the requirements of specifications for petroleum fuels as described in Note 3 . This test method is valid for those fuels in the density range from 750 kg/m 3 to 1000 kg/m 3 and those that do not contain an unusually high aromatic content. High aromatic content fuels will not normally meet some fuel specification criteria. Note 3: The estimation of the heat of combustion of a hydrocarbon fuel from its density and sulfur, water, and ash content is justifiable only when the fuel belongs to well-defined classes for which a relationship between these quantities have been derived from accurate experimental measurements on representative samples of these classes. Even in these classes, the possibility that the estimate can be in error for individual fuels should be recognized. This test method has been tested for a limited number of fuels from oil sand bitumen and shale oil origin and has been found to be valid. The classes of fuels used to establish the correlation presented in this test method are represented by the following applications: Fuel (not applicable to any fuels containing non-hydrocarbon components) Specification Fuel Oils Grades No. 1, 2, 4 (light), 4, 5 (light), 5 (heavy), and 6 D396 Diesel Grades No. 1-D, 2-D, and 4-D D975 Aviation Turbine Jet A and Jet A-1 D1655 Jet B D6615 Gas Turbine Grades No. 0-GT, 1-GT, 2-GT, 3-GT, and 4-GT D2880 Kerosene Grades No. 1-K and 2-K D3699 1.4 This test method is not applicable to pure hydrocarbon compounds. It is not intended as a substitute for highly accurate experimental measurements of heat of combustion ( Note 4 ). Note 4: The procedures for the experimental determination of the gross and net heats of combustion are described in Test Methods D240 and D4809 . 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. ====== Significance And Use ====== 4.1 This test method is intended for use in cases where an experimental determination of heat of combustion is not available and cannot be made conveniently, and where an estimate is considered satisfactory. It is not intended as a substitute for experimental measurement of heat of combustion.