GB/T 14909-2005 in English

《GB/T 14909-2005能量系统用分析技术导则》由TC20（全国能源基础与管理标准化技术委员会）归口，主管部门为国家标准化管理委员会
本标准规定了能量系统媚分析的基本概念与术语、用值的计算基准、用值的计算方法、用平衡、用分析的原则方法及结果表示等，并给出了用分析方法的计算实例。本标准适用于任何涉及能量利用或能量转换的过程、设备、工艺流程或系统，也适用于产品生命周期评价等环境保护方面相关问题的定量分析。

Scope

This standard specifies the basic concepts and terminology of the energy system analysis, the calculation basis of the use value, the calculation method of the use value, the use balance, the principles and methods of the use analysis and the result presentation, etc., and gives the calculation examples of the analysis method. This standard applies to any process, equipment, technological process or system involving energy utilization or energy conversion, and is also applicable to the quantitative analysis of issues related to environmental protection such as product life cycle assessment.