TECHNICAL AND ECONOMIC EFFICIENCY OF COMBINED DISTRICT HEATING WITH LOCAL HEAT SOURCE FOR DISTRICT HOT WATER
The scheme of combined district heating systems is used, in which centralized heating is used for heating and local heat source is used for hot water supply. A mathematical model has been developed that allows to perform a comparative analysis of the technical and economic characteristics of two scenarios of modernization of the heat supply system: replacement of boilers, heat networks and pumps while using the traditional hot water supply scheme, and replacement of these elements in combination with the installation of a local hot water supply source that provides the hot water supply. hot water by means of a local heat network whose length is substantially smaller than the existing one. Electric heaters and solar collectors with electric heating are proposed as local heat sources. The advantages of combined district heating schemes on the planning horizon of 10 years are shown. The analysis of the influence of various factors on the advantage of the combined scheme of district heating is performed. The developed model can be used for preparation of feasibility studies of projects of energy efficient modernization of district heating systems. Ref. 4, Fig. 7, Tab. 1.
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Nikitin Е.Е. [Improving of energy efficiency of population centres district heating systems] : Dis. for a Degree Doctor of Technical Sciences. Kyiv : National Technical University of Ukraine «Igor Sikor- sky Kyiv Polytechnic Institute», 2015. (Ukr.)
Fomich S.V., Taraday A.M., Esin E.S., Bolotsky N.S. Reasons for mass failure systems of centralized hot water supply. Scientific Bulletin of Construction. 2017. No. 1. pp. &. (Rus.)
Nikitin Е.Е. The System Approach to Energy fficient Heat Supply Schemes for Cities and Settlements Development. Energotechnologii i Resursosberez- henie [Energy Technologies and Resource Saving]. 2009. No. 4. pp. 89–97. (Rus.)