Selecting the Number and Size of Boilers Used within the Heating Units of the Residential Complexes

This paper focuses on the selection of number and size of boilers required for the heating units of the residential complexes. In this case study we proposed the selection of number and dimension of boilers for a heating unit of a residential complex located in Tirgu-Mures, Romania. The conclusion of this study is that the operational safety of the heating unit increases once the number of boilers increases, together with the decrease of thermal energy consumption and the increase of investment costs respectively. Based on our calculations, we recommend that the heating unit should be equipped with seven boilers, and should be provided with a controller for managing them in cascade. The method proposed in this paper can be used within the feasibility studies related to heating units of the residential complexes.