ICAO Annex 16 - Environmental Protection --- Volume III - CO2 Certification Requirement

ICAO Annex 16 - Environmental Protection --- Volume III - CO2 Certification Requirement uses a Metric Value (MV) for the CO2 emissions of aircraft. The equations given in the standard are plotted. A simple derivation shows that the shape of the MV is based more on its definition with the exponent 0.24 than the physics of the aircraft. The limit values specified in the standard follows the natural shape of the MV. The exponent 0.24 complicates matters unnecessary.《国际民航组织附件16：环境保护》（ICAO Annex 16 - Environmental Protection）第三卷所规定的二氧化碳认证要求，采用度量值（Metric Value，MV）表征航空器的二氧化碳排放量。该标准中所载的计算公式均已绘制为曲线图。通过简单推导可发现，该度量值的曲线形态更多由其定义中采用的0.24次幂所决定，而非航空器的物理设计特性。该标准中规定的限值同样契合该度量值的固有形态。该0.24次幂的设定不必要地复杂化了相关问题。