WP3 - Climate Functions

The overall objective of this work package is to develop climate functions for the use in the aircraft design optimisation in WP 4, which reliably represent the climate impact of CO2, NOx, H2O emissions, as well as contrailcirrus effects. To reach this overall objective some more detailed objectives have to be achieved:

  • Determination of a climate metric adequately addressing the climate impact of a new aircraft design.
  • Set up of a strategy how to calculate the Climate Functions for Aircraft Design (CFAD).
  • Calculation of the CFAD

For the calculation of the CFAD three steps have to be taken, which relate to the three more detailed objectives:

Based on findings from WP 1 a set suitable climate metrics, including an emission scenario and time horizon, will be determined and the sensitivity to choices made will be tested based on an emission database, such as TRADEOFF or REACT4C. Based on the findings an adequate climate metric will be selected. 

Based on the WP 5 workshop results and in cooperation with WP 2 a strategy to calculate the climate functions will be developed. The WP 5 workshop identifies the parameters which are addressed at the aircraft design level and which are key input parameters to both the calculation of the climate function and its application. Those parameters might be cruise altitude, NOx-Emission Index, fuel consumption, etc. Parameter ranges of these key input parameters and common interfaces for the climate function will be defined in cooperation with the partners. Set-up for the AirClim modelling environment will be developed and tested for this specific application. Based on the tests, a prototype CFAD is derived and exchanged with WP 3 to ensure common interfaces and allow early testing of subsequent tasks.

The set-up of the AirClim modelling environment, which is developed and tested in previous task, will be employed to calculate large look-up tables, which will serve as the basis for the climate function. Cross-checks, e.g. based on the sensitivity calculation performed in WP 3 task 1, will be performed to guarantee the validity of the calculation procedure. Based on these massive calculations the CFAD will be derived and delivered to WP 4 and the work summarized for publication.