1.1. Project Objective The project objective is to increase the energy efficiency, reliability and economic efficiency of the heat supply system by reconstructing the PivnGZK No. 2 boiler house with the introduction of a cogeneration gas piston unit (GPU), which will ensure the simultaneous production of electricity and heat with a high fuel efficiency. The project is aimed at reducing natural gas consumption, reducing electricity purchase costs, increasing the energy autonomy of the facility and reducing the environmental load. 1.2. The main objectives of the project implementation of cogeneration technology with an overall efficiency of up to 85–92%; modernization of existing boiler equipment; optimization of thermal and electrical loads; implementation of an automated process control system; reduction of specific fuel and energy resources costs; ensuring the stability of heat supply in conditions of unstable energy supply. 2. Analysis of the current state and justification of the need for project implementation 2.1. Current technical state At the time of the development of the feasibility study, the boiler house operates according to the traditional scheme of producing exclusively thermal energy using natural gas. Electricity to meet its own needs is purchased from the external network. The existing system is characterized by: lack of its own electricity generation; lack of utilization of secondary heat; physical and moral wear and tear of individual equipment elements; increased specific fuel consumption; limited possibilities for automatic regulation of operating modes. 2.2. A gap has been identified between the current and target states Technological gap: lack of combined energy production; low fuel energy utilization rate (≈50–60%); lack of modern automation systems. Energy gap: significant natural gas consumption per unit of energy produced; 100% dependence on external electricity suppliers; the presence of network electricity losses. Economic gap: high operating costs; increasing electricity tariffs; lack of mechanisms for compensating peak loads. Environmental gap: increased specific CO₂ emissions; irrational use of fossil fuels. Thus, the existing energy supply model does not meet modern requirements for energy efficiency, economic feasibility and energy security. 3. Description of methods for achieving the project goal 3.1. Technical solutions 3.1.1. Installation of a cogeneration gas piston plant It is planned to install a GPU, which will ensure: electricity generation to cover the facility's own needs; utilization of exhaust gas heat; use of engine cooling system heat; connection to the existing boiler house thermal scheme. The expected overall efficiency of the plant is up to 90%. 3.1.2. Modernization of boiler equipment implementation of weather-dependent regulation; installation of frequency converters on pumping equipment; automation of combustion processes; optimization of boiler cascade operation. 3.1.3. Implementation of automation and dispatching system automated process control system (ACS); monitoring of electricity and heat generation; gas consumption control; optimization of equipment operating modes. 4. Expected results of project implementation As a result of project implementation, it is planned to: increase the fuel efficiency to 85–92%; reduce natural gas consumption by 15–25%; reduce electricity purchase costs; reduce CO₂ emissions by 15–30%; increase the reliability and continuity of heat supply; reduce the investment payback period to 3–5 years (depending on the operating mode). 5. Socio-economic significance of the project The implementation of the project will ensure: increasing the energy sustainability of the facility in conditions of martial law and unstable energy supply; reducing the financial burden on the enterprise/budget; creating additional jobs during the project implementation; compliance with state policy in the field of energy efficiency; reducing the environmental impact on the environment. 6. Conclusion The reconstruction of the boiler house "PivnGZK No. 2" with the installation of a cogeneration gas piston unit is a technically sound, economically feasible and socially significant investment project. The project allows to eliminate the existing technological and energy gap between the current state of the heat supply system and modern requirements for energy efficiency, ensure the stability of energy supply and create long-term savings of budget funds.

Key problems and their relevance Reconstruction of the boiler house "PivnGZK No. 2" (Kryvyi Rih) is due to the presence of the following problems: Low energy efficiency - separate production of heat and electricity provides an efficiency of only 50-60%, which leads to overspending of natural gas. Complete dependence on external power supply - the lack of own generation increases the risks of outages and financial costs. High operating costs - significant funds are spent on the purchase of electricity and fuel. Equipment wear and insufficient automation - limited opportunities for optimizing operating modes and increased risk of accidents. Increased environmental load - higher specific CO₂ emissions due to low efficiency. Relevance of problems Problems are especially relevant in the conditions of: increasing cost of energy carriers; instability of energy supply; increasing requirements for energy efficiency and environmental friendliness. If they are not resolved, further cost increases, technical risks, and reduced reliability of heat supply are possible. Expected positive changes The implementation of the project will allow: to increase efficiency to 85–92%; to reduce gas consumption by 15–25%; to reduce electricity costs; to increase energy autonomy; to reduce CO₂ emissions. The project will ensure economic, energy, and environmental stability of the facility.