This standard specifies the principles for the analysis of energy-using systems (the left part is fire and the right part is use). This standard applies to any process, equipment, process or system involving energy utilization or energy conversion.
GB/T 14909-1994 history
2021GB/T 14909-2021 Technical guidelines for exergy analysis in energy systems
2005GB/T 14909-2005 Technical guides for exergy analysis in energy system