Providing the boiler house with an alternative source of electricity supply and reliability and efficiency of heat supply of the city infrastructure of Chornomorsk. The gas-piston cogeneration plant (backup power source) being designed is based on the operation of two Jenbacher JMS 312 GS-N.L cogeneration gas-piston plants with an electric capacity of 638 kW and a thermal capacity of 377 kW each. The plant is designed to meet the needs of the central gas-generating KP "Chornomorskteploenergo" and operates in cogeneration mode: the generation of electrical energy occurs together with the generation of thermal energy, which, performing the function of cooling the gas-piston engine, is simultaneously directed to heating the coolant in the heating network. The system under consideration is provided for two operating modes: - the so-called "island" mode, when the plant operates separately from the heating network, generating electricity only for the needs of the gas-generating plant; - parallel operation mode with the power grid. In this mode, the power plant mainly works to meet its own needs of the gas generator, and peak surges in electricity consumption of the gas generator (starting currents) are compensated by the external power grid. This mode allows for more uniform operation of the power generating equipment, which ensures its uniform wear. The total heat load in the gas generator is 1434 kW, an additionally installed economizer increases the total thermal power indicator to 717 kW for each unit; Type of fuel - natural gas. Circulation of the coolant through the cogenerators is forced, by a circulation pump. To protect the cogenerator from excess pressure, spring safety valves and individual volume compensators are designed. The cogenerators are individually protected from high return coolant temperature by dry cooling towers located on the roof of the building. To compensate for the thermal expansion of the coolant in cogenerators, it is planned to install a Dan-Wates membrane expansion tank with a volume of: 500 l on the "active" circuit; 100 l on the "passive" circuit, in accordance with the schematic diagram. Flue gases from each machine individually pass through a flue gas silencer, reducing the noise pressure in the room. Next, the flue gases enter the economizer, after which two horizontal Dn250/320 chimneys, which are located one above the other vertically, exit the machine room. At a distance of 7 meters from the machine room, there is a common Dn500/560 chimney, 25 m high, where flue gases are discharged into the atmosphere. The cogenerator uses pumping equipment manufactured by Wilo.

In the context of martial law, damage to energy infrastructure, and electricity shortages, the risk of prolonged outages has increased significantly. Heat supply facilities are critical infrastructure and must operate continuously.