# Method Case study Table Industrial excess heat potential approximate

3. Method

3.1. Case study

Table 1.

Industrial excess heat potential (approximate numbers) modeled. The heat potential BMY 45778 derived from a questionnaire in Gävleborg County presented in Broberg Viklund and Johansson [3].Temperature (°C)Heat carrier (GW h/year)WaterFlue gasesAir45––0.0000350150––551––60183–416582––75–3–952––10072––165–98–275–61–Not specified700.06–Full-size tableTable optionsView in workspaceDownload as CSV

3.2. Energy systems modeling tool

The studied system is modeled using the energy systems modeling tool reMIND.2 The tool has been developed for optimization of dynamic industrial energy systems and uses mixed integer linear programming (MILP) to minimize system costs (system costs include e.g., energy costs and costs for raw materials). reMIND can be used for several purposes. For example, it can be used to find the optimal structure of an industrial energy system, and/or to find the optimal flow distribution in a fixed structure, and/or be used to investigate changes occurring in an industrial energy system or its boundary conditions.