The technique of the analysis of combined-cycle power plants with binarity coefficient which is less than one is offered. The technique enters a heating indicator. The index characterizes warmth anneafling by combined-cycle power plant. Plant is equipped with the steam turbine with heating selection of steam. Plants with afterburning and dual-fuel plants are considered. Interference of again entered index, degrees of binarity, various efficiencies is at each other shown in this article. The heat balance diagrams and the power streams’s integrated charts of combined-cycle plants on the basis of the gas-turbine unit V64.3 are submitted. The calculated quantitative values of an efficiency on power generation on thermal consumption, coefficient of binarity, a heating index, the relative annealing of warmth and other characteristics for some of the actual or being in a stage of the project combined-cycle plants are given.

The article addresses the problems of local power plants operating on fossil fuels such as gas and coal. As a solution to the problem, it is proposed to consider dual-fuel combined cycle power plants with a parallel operating scheme. This type of combined cycle technology is good variant for integration into coal predominating districts. Therefore, the efficiency of dual-fuel combined cycle power plants operating at subcritical (p 0 = 13 MPa, t 0 = 540 °C) and supercritical (p 0 = 24 MPa, t 0 = 545 °C) initial steam parameters are discussed in the article. The thermal model and a calculation methodology for the installation under consideration are proposed. The results of the installation’s technical and economic indicators analysis are presented. Additionally article sets out the assessment of capital costs, Net Present Value and the possibility of using the technology under study within the framework of the considering region.