ETEM: Energy Technology Environment Model
ETEM is a bottom-up model that finds optimal energy and technology based decisions taking into account the energy needs of a city or a region. The model aims at finding an energy mix with minimal cost, investing in equipment (new technology), production capacity (installed technology) and import/export of primary or secondary energy. The model permits an assessment of energy and environmental policies, measures emissions due to the energy system and finds optimal ways to satisfy constraint on the emissions.
This type of model has been used for cities in Sweden, and more recently in Switzerland. It is currently in development for two regions in Switzerland and Luxembourg.
ETEM belongs to the MARKAL and TIMES model family and is implemented in a free algebraic modeling language (GMPL).
ETEM model has been developed to provide the following features:
- Flexible representation of any energy system.
- Ready to be integrated in a coupling framework with a chemical model (for instance an air quality model), an economic model (computable general equilibrium model), etc.
- The model has been developed to be modular and then accept easily new features described by new equations and variables.
Structure of the model:
- TIME: the time horizon is divided into a number of time-periods containing the same number of years (flexible duration of time periods will be available soon as a new feature).
- DEMAND: the model is driven by the demand in energy services (also called useful demands).
- RES (for Reference Energy System): the reference energy system component describes the organization of the energy system. It consists of three elements: processes, commodities and flows.
- TECHNO-ECONOMIC DB: a set of economic parameters defines the characteristic (costs, efficiency, availabilities,...) of the processes, commodities and flows. The RES also defines the main constraints on the system, due to resource availability or pollutant/GHG emissions.
Contents of the ETEM package, version 2.1:
- An ETEM model file.
- An anonymous ETEM data file.
- A reference manual in pdf format.