Methodological provisions to the formation and the ensuring of efficiency and reliability of district-distributed heating systems

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Abstract

This study proposes a methodology for solving two problems of optimal development of district heating systems: analysis of efficiency areas and reliability of heat supply. In solving both problems, we adopt a nodal approach, which allows us to get detailed results that are most suitable to the real-world conditions. Based on the proposed methods and models, we develop an algorithm for transforming existing district heating systems into district-distributed heating systems with prosumers implemented into the network to serve the loads that fall outside the range of efficient operation of a district heating system. Wherein, the distributed sector is formed based on a prosumer that has its own generation, covering part of its own heat load and providing an additional functional and time redundancy for the system. As a result, conclusions and directions for further research are formulated.

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About the authors

V. A. Stennikov

Melentiev Energy Systems Institute SB RAS

Author for correspondence.
Email: sva@isem.irk.ru
Russian Federation, Irkutsk

I. V. Postnikov

Melentiev Energy Systems Institute SB RAS

Email: postnikov@isem.irk.ru
Russian Federation, Irkutsk

E. E. Mednikova

Melentiev Energy Systems Institute SB RAS

Email: isem348@mail.ru
Russian Federation, Irkutsk

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Supplementary files

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2. Fig. 1. Illustration of methods for determining the efficiency limits of heat supply in the TSS based on the RET criterion: (a) integral approach - a single radius is determined for each IT based on the assumption of uniform distribution of the heat load; (b) the proposed nodal approach - solutions are obtained for the nodes of each main line from the system sources.

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3. Fig. 2. Methodology for determining the RET in the TSS.

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4. Fig. 3. Main components of the comprehensive reliability analysis of the TSS.

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5. Fig. 4. Algorithm for solving the studied problems of developing centralized-distributed TSS: Block A - determining the efficiency limits of centralized heat supply of the original scheme based on the RET criterion; Block B - reliability analysis within the efficiency limits with a transition to the reliability synthesis (ensuring) block, if necessary; Block C - determining the efficiency limits of the distributed heat supply sector, formed from the nodes of the original scheme located outside the RET boundaries; Block D - analysis and ensuring the reliability of the distributed heat supply sector based on the prosumer.

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6. Fig. 5. Stages of formation of centralized-distributed heat supply systems with defining criteria of economic efficiency (radius of efficient heat supply) and reliability of heat supply (nodal reliability indicators).

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