Master's Thesis Johannes Steinbüchel


Automated generation of hydraulically balanced heat distribution systems for building performance simulations in Modelica

Master's Thesis Steinbüchel Copyright: EBC Creation of heating pipe networks using the Modelica Network Generator (MoNetGen)

The generation of hydronically balanced heating networks in Modelica for building performance simulations (BPS) is time-consuming and error-prone.

This thesis presents a Python based, semiautomatic tool with graphical user interface (GUI) for the generation of hydronically balanced heating networks. With floor plans, the building's heat load and pipe manufacturers' data as input, the user creates a network of nodes and edges. The Modelica Network Generator (MoNetGen) offers the possibilities to construct a radiator heating network as well as floor heating network. It translates the built layout into a network of pipe-, resistance- and radiator-component classes, which are parameterized in the GUI.

After automatic hydronic balancing and the input of valve authorities, a package with the complete hydronic and heat transfer models of the building is generated.

Simulations in different setups show that the generated models can guarantee a homogeneous heat distribution inside the building. The accuracy with regard to the nominal mass flows and the return temperatures improves ten times more than before.