ASSESSMENT OF THE OPERABILITY OF THE WATER HEATING SYSTEM, NOT RELEVANT TO THE PROJECT

Abstract

When designing water heating systems, it is necessary to avoid unjustified use of excess equipment, exceeding diameters beyond the required values, etc. In reality, there are deviations from the project during installation, which lead to the need to revise the parameters of the system's operability. One of the cases is the replacement of pipelines of one diameter with another. Consideration of the prospects for the operation of such a heating system by example is the purpose of this work.
 For example, the water heating system in a residential 11-storey building in Brest (Belarus) built in 2019 is considered. The house has designed an apartment-by-apartment two-pipe horizontal water heating system with the installation of heat meters for each apartment. When installing the heating system, the apartment-by-apartment branches of the heating system were mounted with polyethylene pipelines with a diameter of 18×2,5 mm and 14×2 mm instead of the design 25×3,5 mm and 16×2 mm.
 To analyze the prospects for the functioning of the designed heating system, calculations of hydraulic resistances in the system at maximum coolant flow rates were performed, as well as their correlation with the parameters of the pumping equipment installed in the individual heating point.
 Calculations have shown that the installed pump is sufficient for the operation of the heating system with the actual diameters of the pipelines. Thus, the actually applied pipe diameters do not adversely affect the performance of the heating system in question.