Evaluation of Thermal Energy Storage Capacity by Heat Load Analyses

Two different methods have been used to analyse the heat load variation. The relative daily variation of heat supply for the particular DH system ranges from 1.66 to 2.06%. The largest daily heat load variation reaches 29% from the daily average heat supply. Results show that it would be necessary to install TES with the capacity of around 5500 MWh to prevent weekly heat load variations and 634 MWh for daily heat load variations in the winter period. The necessary capacity of TES for the summer period is 80 MWh for daily heat load and 600 MWh for weekly heat load levelling.