expected_life {CNAIM}

Expected Life

Description

This function calculates the expected life of an electric network asset measured in years when it would be expected to first observe significant deterioration. The expected life is derived based on the assets normal expected life, duty factor and location factor. See section 6.1.4 on page 36 in CNAIM (2021).

Usage

expected_life(normal_expected_life, duty_factor, location_factor)

Arguments

normal_expected_life

Numeric. The number of years a new asset is expected to normally last. I.e. technical life time. See page 107, table 20 in CNAIM (2021).

duty_factor

Numeric. E.g. the output returned by the function duty_factor_transformer_11_20kv().

location_factor

Numeric. The output returned by the function location_factor().

Value

Numeric. Expected life.

Source

DNO Common Network Asset Indices Methodology (CNAIM), Health & Criticality - Version 2.1, 2021: https://www.ofgem.gov.uk/sites/default/files/docs/2021/04/dno_common_network_asset_indices_methodology_v2.1_final_01-04-2021.pdf

Examples

# An asset e.g. a transformer with an expcted life of 50 years
expected_life(normal_expected_life = 50,
              duty_factor = 1,
              location_factor = 1)