“Energy economy environment models such as TIMES are often used to look at opportunities and costs of reducing greenhouse gases (GHGs). The South African TIMES model (SATIM) has been developed for this purpose and its methodology is documented online. This document presents an overview of the SATIM liquid fuels and gas supply sector methodology. South Africa has one of the more diverse refining industries in the world, as its liquid fuels are produced from crude oil in conventional refineries and from coal and gas in so-called synthetic fuel refineries. The SATIM methodology is therefore a potentially useful reference for modellers in countries that produce their own liquid fuel supply.”