T-1A1c-TE-4 - Improved bus engine technology

Background

IPCC WG3 definition: .

TBD

Sustainability Category: Amber

This transition element has only moderate climate impact but may be necessary for maintaining urban needs, with a clear pathway to decarbonization. While not aligned with net-zero targets, this transition element is actively improving the emissions profile and represents intermediate performance on the path to sustainability.

Transition Element

⁠	⁠
Shift type:	Efficiency Shift
Operations:	vehicle_km
Activity measure:	vehicle_km
Activity conversion:	1

Activities

⁠	Improves:
	T-1A1c-A-1 - Petrol buses
	T-1A1c-A-2 - Diesel buses
	T-1A1c-A-4 - Gas buses
	T-1A1c-A-5 - Hydrogen buses
	T-1A1c-A-6 - LPG buses

Parameters

Parameter	Unit	Description
bus_efficiency_improvement_factor	percent	Engine efficiency improvement factor for buses
energy_intensity_buses_diesel	kwh_vehicle_km	Energy intensity diesel buses

YAML Specification

sustainability: amber
type: update
longName: Improved bus engine technology to reduce fuel use.
shortName: Bus technology
version: 2.0.0
description: Reduce the amount of energy required to drive diesel, petrol, hydrogen,
  CNG and LPG buses through improved engine technology
weightInversionExpression:
  expression: ((1 / ( unknown_x / %[0] )) - 1) / %[1]
  variables:
  - energy_intensity_buses_diesel
  - bus_efficiency_improvement_factor
unitOfMeasure: vehicle_km
cohort:
  expression: '1'
variablesToUpdate:
- update: energy_intensity_buses_diesel
  type: EFFICIENCY_IMPROVEMENT
  by:
    expression: '%[0]'
    variables:
    - bus_efficiency_improvement_factor
- update: energy_intensity_buses_petrol
  type: EFFICIENCY_IMPROVEMENT
  by:
    expression: '%[0]'
    variables:
    - bus_efficiency_improvement_factor
- update: energy_intensity_buses_hydrogen
  type: EFFICIENCY_IMPROVEMENT
  by:
    expression: '%[0]'
    variables:
    - bus_efficiency_improvement_factor
- update: energy_intensity_buses_gas
  type: EFFICIENCY_IMPROVEMENT
  by:
    expression: '%[0]'
    variables:
    - bus_efficiency_improvement_factor
- update: energy_intensity_buses_lpg
  type: EFFICIENCY_IMPROVEMENT
  by:
    expression: '%[0]'
    variables:
    - bus_efficiency_improvement_factor
carbonCausalChains:
  atoc:
    expression: '1'
  chains:
  - chain: diesel_buses
  - chain: petrol_buses
  - chain: hydrogen_buses
  - chain: gas_buses
  - chain: lpg_buses