Comparative analysis of the energy efficiency of different types co-generators at large scales CHPs

The comparative engineering analysis for the following cogenerator types have been performed: eleven Jenbacher piston engines J920 (Jenbacher, 11xJ920) with an installed power capacity per engine of 9.52 MW; 2 S Gas Turbines SGT-800 (Siemens 2 x SGT-800) with an installed power capacity of each turbine of 56.35 MW; one General Electric Gas Turbine 6F.03 (GE 1 × 6F.03) with the installed power capacity of 83.05 MW. Considered variants of co-generators should replace ineffectively operating existing unit in summer mode in a large scale CHP, which includes steam boiler TGMP-344A and steam turbine T-250/300-240-2. A multi-parameter analysis was performed to select a cogeneration plant and for the first time is one of the largest district heating plants of Central and Eastern Europe, incorporating several different technologies (gas turbine installation, gas-piston engine). Comprehensive analysis of significant components (technical, economic, environmental, noise, etc. specific) allows making the right investment decision. •Multi-parameter analysis to select a cogeneration plant with different technologies is presented.•The analysis is for one of the largest district heating plants of Central and Eastern Europe.•Analysis of the energy efficiency and economic feasibility of the existing energy units is made.•In-depth analysis of the energy efficiency of three different cogeneration technologies is done.•Important financial and environmental benefits of the three new technologies is identified.