1.1 本试验方法涵盖碳氢燃料燃烧热的测定。当重复测定之间的允许差值为0.2量级时，它专门设计用于航空涡轮燃料 %. 它可以用于广泛的挥发性和非挥发性材料，在这些材料中可以容忍稍大的精度差异。 1.2 为了达到该精度，必须严格遵守程序的所有细节，因为影响精度的每个单独测量产生的误差应保持在0以下。 04 %, 尽可能。 1.3 在正常条件下，本试验方法直接适用于汽油、煤油、1号和2号燃油、1-D和2-D号柴油以及0-GT、1-GT和2-GT号燃气轮机燃料。 1.4 通过改进热量计控制和温度测量，与测试方法相比，精度得到了提高 D240 . 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、健康和环境实践，并确定监管限制的适用性。 有关具体的警告声明，请参阅第节 7. , 10.6 , A1.7.1 和 附件A3 . 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 燃烧热是衡量燃料可用能量的指标。在考虑发电或供热设备的热效率时，了解该值至关重要。 5.2 质量燃烧热，即每单位质量燃料的燃烧热，通过该程序测量。其大小对于重量有限的飞行器（如飞机、表面效应飞行器和水翼艇）尤其重要，因为此类飞行器在给定重量的燃料上可以行驶的距离是燃料质量燃烧热及其密度的直接函数。 5.3 燃烧体积热，即每单位体积燃料的燃烧热，可以通过燃烧质量热乘以燃料密度（每单位体积的质量）来计算。燃烧的体积热，而不是燃烧的质量热，对于汽车和船舶等体积有限的飞行器来说很重要，因为它与加油之间的行驶距离直接相关。

1.1 This test method covers the determination of the heat of combustion of hydrocarbon fuels. It is designed specifically for use with aviation turbine fuels when the permissible difference between duplicate determinations is of the order of 0.2 %. It can be used for a wide range of volatile and nonvolatile materials where slightly greater differences in precision can be tolerated. 1.2 In order to attain this precision, strict adherence to all details of the procedure is essential since the error contributed by each individual measurement that affects the precision shall be kept below 0.04 %, insofar as possible. 1.3 Under normal conditions, this test method is directly applicable to such fuels as gasolines, kerosines, Nos. 1 and 2 fuel oil, Nos. 1-D and 2-D diesel fuel, and Nos. 0-GT, 1-GT, and 2-GT gas turbine fuels. 1.4 Through the improvement of the calorimeter controls and temperature measurements, the precision is improved over that of Test Method D240 . 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see Section 7 , 10.6 , A1.7.1 , and Annex A3 . 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The heat of combustion is a measure of the energy available from a fuel. A knowledge of this value is essential when considering the thermal efficiency of equipment for producing either power or heat. 5.2 The mass heat of combustion, that is, the heat of combustion per unit mass of fuel, is measured by this procedure. Its magnitude is particularly important to weight-limited vehicles such as airplanes, surface effect vehicles, and hydrofoils as the distance such craft can travel on a given weight of fuel is a direct function of the fuel's mass heat of combustion and its density. 5.3 The volumetric heat of combustion, that is, the heat of combustion per unit volume of fuel, can be calculated by multiplying the mass heat of combustion by the density of the fuel (mass per unit volume). The volumetric heat of combustion, rather than the mass heat of combustion, is important to volume-limited craft such as automobiles and ships, as it is directly related to the distance traveled between refuelings.