Stock Turnover Analysis

The document describes the stock turnover analysis methodology in LEAP, which is used when energy-using devices have long lifetimes or changing operating characteristics. It details two specific approaches: one for the transport sector, calculating consumption based on vehicle stock, mileage, and fuel economy, and another for general energy-using equipment, based on device stock and energy intensity. Both methods utilize lifecycle profiles to account for changes in device performance and survival rates as they age.

• Stock turnover analysis is most effective for energy-using devices with long lifetimes, as changes in the energy intensities and emission factors of new devices take time to influence the average of the total installed stock.
• For transport models, LEAP calculates total energy consumption by multiplying the stock of vehicles, the annual vehicle mileage, and the fuel economy.
• Transport stock turnover analysis in LEAP allows for the specification of emission factors per unit of distance traveled (e.g., grammes/veh-mile), which differs from other demand analysis methods that only allow factors per unit of energy consumed.
• For non-transport energy-using equipment, total energy consumption is determined by multiplying the stock of devices by the energy intensity per device.
• LEAP utilizes Lifecycle Profiles to model how variables, such as vehicle mileage or emission factors, change as devices age.

APA

Stockholm Environment Institute (n.d.). Stock Turnover Analysis. https://cdn.leap.sei.org/Help24/Demand/Stock_Analysis.htm

Chicago

Stockholm Environment Institute. Stock Turnover Analysis. n.d. https://cdn.leap.sei.org/Help24/Demand/Stock_Analysis.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Stock Turnover Analysis |url=https://cdn.leap.sei.org/Help24/Demand/Stock_Analysis.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendstock, author = {{Stockholm Environment Institute}}, title = {{Stock Turnover Analysis}}, institution = {Stockholm Environment Institute}, url = {https://cdn.leap.sei.org/Help24/Demand/Stock_Analysis.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }