ETEM: Energy Technology Environment Model

ETEM is a bottom-up model that find optimal energetical and technological decisions taking in account the energy needs of a city. The model aims at finding energy policy with minimal cost, investing in equipment (new technology), production capacity (installed technology) and import/export of primary energy. The model permits to analyse the impact of energy and environment policy, mesure emissions due to the energy system with or without strong constraint on the emissions.

This model has been used for cities in Sweden, and more recently in Switzerland. It is currently installed for a forthcoming use in Luxemburg and Greece.

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), ...
• The model has been developped to be modular and then accept easily new features

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 a next 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. They also define constraints on the system.

Contents of the ETEM package, version 2.1:

• an ETEM model file
• an anonymous ETEM data file
• a reference manual in pdf format