The current set of problems in the field of heat power engineering has remained unresolved for many years. Ecological modernization of fixed assets of heat supply enterprises is defined as the main direction of ensuring the activities of regional heat supply systems in this article. The subject of the research is a set of theoretical, methodological and practical issues of the analysis of indicators of the ecological and economic efficiency of the boiler house modernization project. The purpose of the study is to analyze the ecological and economic efficiency of the project for the modernization of boiler houses to replace coal with more environmentally friendly fuels. The study has been carried out using a set of methods: comparative analysis, analysis of structure, financial analysis. The use of solid biofuels makes it possible to reduce the anthropogenic load from heat supply enterprises. The ecological effect consists in the reduction of total emissions into the atmosphere by 69 times or by 321 tons per year of the boiler house on bit fuel compared to a similar boiler house on coal. The economic effect for the boiler house lies in the possibility of saving on fees for the negative impact on the environment, depending on the fuel used. The calculations show that payments for negative impact on the environment have a small share in the cost of steam and hot water production by boiler houses. In this connection, this cannot become a motive for reducing the negative impact. It is necessary to establish standards for the negative impact and waste disposal at a minimum level in order to form a material interest among economic entities in reducing the anthropogenic load on the environment. The author has calculated the environmental and economic indicators of the project for the modernization of regional heat supply systems, based on the transition from using coal as the main fuel. This calculation can become the basis for the state program for the modernization of thermal energy
Analysis of economic efficiency of heat supply systems of city districts