Object-oriented simulation of energy supply systems on the basis of renewable energy
Christian Herzog, Jens Kahler · 2003
The usage of renewable energy sources has become more important in recent times mainly due to shortage of fossil fuels. Thus new challenges arise for the control and planning of heat supply systems. These systems work with different renewable energy sources (earth heat, solar radiation, exhaust air heat from building), which therefore lead to control problems with a higher rank of difficulty. The main goal of these control strategies is the reduction of operational cost as well as an increase in the rate of return for the investment. This paper describes the simulation of a heat supply system using Dymola [13] by means of objectoriented modelling with Modelica. The final aim of such a simulation is to develop a model predictive control strategy on the basis of the proposed objectoriented model in Modelica. To develop such a control strategy it is necessary to gain knowledge about the heat demand of buildings and the power usage of its different components. The use of Computer Aided Engineering (CAE) can lead to a further reduction of development costs. A Dymola library named RECOMB has been created to support of modelling and simulation of such heat supply systems. The name RECOMB stands for Renewable Energy Components mOdelling and optiMisation of Buildings. The library itself consists of sub-libraries: