Solutions of energy-related upgrading of the existing building connected to the cogeneration heating system in Romania

The energy rehabilitation of district heating system requires a proper expert survey of secondary loop including thermal substation, heat carrier distribution network and buildings of residences. This paper present the theoretical fundamentals as well as the measurements specific to the procedure used in assessing the thermal characteristics of the heat exchangers, network and buildings of residences. The results obtained were used in the diagnosis activity supported by the SIMPATIC software. The paper also introduces the present energy efficiency of the PT 1 Uverturii thermal substation as well the efficiency values that may be reached as a results of the rehabilitation of the entire system.