An energy model for overall optimization of a nuclear based district heating system

A general optimization model for a district heating system is being developed by AB Atomenergi in Sweden with participation from the Technical Research Centre of Finland. The general model consists of numerous submodels designed in such a way that modular optimization is also possible. These submodels are the electrical system optimization model, the turbine model, the heat transport system model and the distribution and utilization model. The Technical Research Centre of Finland is cooperating with Atomenergi in developing the electrical system model. Other institutes and organisations in Sweden are participating in the development of other submodels. We here describe the models developed and give some preliminary results of the first runs with the general optimization model, showing the influence of different parameters on the cost of heat delivery. One-way heat transport systems in connection with low temperatures have also been evaluated and compared to conventional solutions for high and low temperature techniques. (author)