Life-cycles in GEMIS
GEMIS models and calculates so-called life-cycles of energy and material flows based on process chains which are stored in it database. The basic scheme of a life-cycle is shown in the following graph for the example of electricity.
In addition to energy flows (red arrows), also transport processes are needed which in turn need energy. Furthermore, the energy and transport processes must be manufactured, for which materials are needed. The production of these materials again requires energy and transport processes.
This leads to a process network in which unit processes are coupled through links, thus creating integrated life-cycles. This allows to determine environmental, cost and employment effect along the full life-cycles so that indirect effects of upstream processes are taken into account: