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The article discusses the issue of a heat providing to consumers in terms of capital and operating costs. Our energy complex is the first installation that does the simultaneous use of vapor compression and absorption heat pumps to transform low-grade heat of the same source, due to the operation of the heat engine. The schemes and results of calculating the modes of the heat generator at ideal and real conditions are presented. The economic calculation of the heat generator capital and operating costs and the most common sources of heat supply: gas, electric, solid fuel and liquid fuel boilers, gas condensate boiler and heat pump, has been performed. A feasibility and comparative analysis of the results is carried out. The conclusion is drawn on the using efficiency the heat generator of increased power and on the prospects of further scientific research in this direction.

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