District Heating Modelling and Simulation

Abstract

Low and moderate geothermal resources are found in most areas of the world. In order to decrease air pollution and save conventional energy, geothermal energy as a heat source for district heating system have been used widely in China in recent years due to its cleanness and lower operating cost. This paper describes the geothermal resource and district heating system in Tianjin. Heat load for one sample building was calculated. Based on it, both geothermal heating and a fuel fired system using steady-state model and dynamic model were simulated, influence of radiator size on return temperature and mass flow was analyzed and radiator was selected, A sample district heating system network was set up, pressure and temperature drop of pipeline were calculated, and the system simulated. The results show that radiator size affect the indoor temperature significally, and, dynamic simulation model is an effective way to study the system performance, as the heating system can be controlled freely by controlling the maximum mass flow and radiator size.