International Building Performance Simulation Association (IBPSA)
Abstract
This paper describes the simulation model and the performance evaluation of a low energy district heating distribution network which supplies heat to 75 apartments. Suitable criteria of thermal operation are selected: the relative heat loss in the distribution system, the specific heat loss, the heat density, the total energy consumption and the seasonal performance factor of the system. The purpose is to investigate the uncertainties on the performance of district heating systems introduced by parameters influencing heat losses in the distribution network. An uncertainty and sensitivity analysis were conducted. The analysis was carried out by using the simnulation data of one week in winter period. Results regarding performance assessment and uncertainty are discussed. They show how sensitive the solution is in the face of different parameter values and especially the interactions between them. The results demonstrate that by using a central storage tank in the heating production plant the robustness of the system increases
