Operational conditions for a PTVM-180 water heating boiler incorporated into a two-circuit flowchart

The paper considers the possibility of varying within the wide range, the temperature of edge water at the output of the boiler and of estimating its influence upon the temperature of gases released and on the operational economic efficiency of the boiler connected with various hydraulic flowcharts. It has been shown that the 'brutto' efficiency of the boiler, connected according to the two-circuit flowchart and, ignoring heat losses in environment by heat exchangers, is 88.3%, that is by 1.2% lower than the efficiency of a boiler operating according to the typed flowchart. For the first time, the authors have obtained real corrections to the temperature of released gases and the 'brutto' efficiency of the boiler, depending on water temperature at the inlet of the boiler and water flow rate in the boiler.