INCREASING THE EFFICIENCY OF BIOFUEL USE IN THE HEAT SUPPLY BACKUP SYSTEM

It is noted that increasing the efficiency of fuel use in the energy sector of Ukraine is a key task for reducing heat supply costs and improving the environmental situation. The solution to this problem is considered through the example of the use of waste gas heat utilisation of a 5,0 MW biofuel water heat generator as a backup source of heat energy in the heat supply system, connected by a combined heat and power scheme to the existing heat supply system of the city of Lutsk. The use of a condensing economiser heat generator in a heat recovery system connected to the return pipeline of a modernised heating network is proposed. The results of the calculation analysis of the operational characteristics of the biofuel heat generator at different operating modes in the heating and summer periods are provided. It is shown that with the technical implementation of cooling the waste gases to a temperature below the dew point, compared to the option in the absence of such a solution, creates additional conditions for improving the operation of the heat supply system: with heating the return heat carrier in the winter period, ensuring the production of heat energy while maintaining the heat carrier temperature not lower than the minimum permissible in the event of emergency absence of natural gas supply, accumulating heat energy at night during summer period in the volume of the pipes of the heat network.In addition to improving the reliability and viability of the city's heat supply system, the project for the implementation of deep utilisation of waste gases from a biofuel heat generator will result in additional natural gas savings of more than 16% during the year of operation.