scholarly journals MATHEMATICAL MODEL FOR CALCULATING CO-PARTICIPATION OF HEAT-ENERGY SOURCES IN COVERING THE LOADS OF CONSUMERS OF LARGE HEAT SUPPLY SYSTEMS WITH SEVERAL SOURCES OPERATING FOR GENERAL HEAT NETWORKS

2017 ◽  
Vol 21 (11) ◽  
pp. 144-158
Author(s):  
Zoya I. Shalaginova ◽  
Keyword(s):  
Mathematical Model ◽  
Heat Supply ◽  
Heat Energy ◽  
Energy Sources ◽  
Heat Networks ◽  
Large Heat ◽  
Heat Supply Systems ◽  
Supply Systems

Optimization of Developing Heat Supply System in Competitive Market Environment

2013 ◽  
Vol 2 (4) ◽  
pp. 100-119 ◽  
Author(s):  
V. A. Stennikov ◽  
O. V. Khamisov ◽  
A. V. Penkovsky
Keyword(s):  
Mathematical Models ◽  
Heat Supply ◽  
Heat Energy ◽  
Competitive Market ◽  
Energy Market ◽  
Market Environment ◽  
Heat Networks ◽  
Heat Supply Systems ◽  
Supply Systems ◽  
Heat Energy Market

The paper is aimed at working out the mathematical models and methods to solve the problems of operation of developing heat supply systems in a competitive market environment. The formation of new principles of functioning in this field is conditioned by the market mechanisms emerging due to the interaction between different owners of heat economy facilities within the single system. Today heat energy markets are represented by a great number of enterprises with different types of ownership that operate heat energy sources and heat networks. It is obvious that such a situation explicitly causes conflicts of interests among the heat energy market participants and unbalances the responsibility for production reliability, heat energy supply efficiency and its quality among the participants of centralized heat supply (heat sources – heat networks - consumers). A reasonable solution to this problem can make it possible to determine optimal conditions for operation of the developing heat energy market, and their implementation can increase technical, economic and energy efficiency of heat energy. These problems are solved by using the methods of hydraulic circuit theory, nonlinear dynamic programming and two level programming. The studies performed allowed the creation of mathematical models and methods for optimal construction of efficient heat supply systems, organization of their operation that ensure the realization of full energy saving potential in the field of heat supply to consumers, taking into account the interests of all participants of the heat energy market.

scholarly journals Aggregation of distribution heating networks in the problems of hierarchical optimization of large heat supply systems

2020 ◽  
Vol 219 ◽  
pp. 03003
Author(s):  
Alexandr Lutsenko ◽  
Nikolay Novitsky
Keyword(s):  
Dynamic Programming ◽  
Heat Supply ◽  
Hierarchical Optimization ◽  
Dynamic Programming Method ◽  
Hierarchical Approach ◽  
Large Heat ◽  
Heat Supply Systems ◽  
Significant Obstacle ◽  
Supply Systems ◽  
Heating Networks

The article shows that the problem of dimension is a significant obstacle to the automation of solving the problem of finding optimal hydraulic modes of heat supply systems. To overcome this problem, the authors have previously proposed a hierarchical approach to optimizing the hydraulic modes of heat supply systems. The article discusses the problem of aggregating distribution heating networks within the framework of this approach. To solve it, the previously proposed by the authors of loop reducing dynamic programming method is adapted. Its operability and computational efficiency are checked on computational experiments.

Improvement of the methodology assessment of reliability heat supply systems at the facilities of main pipelines

2021 ◽  
pp. 198-202
Author(s):  
Марина Николаевна Ильина ◽  
Дмитрий Васильевич Ларюшкин
Keyword(s):  
Cluster Analysis ◽  
Heat Supply ◽  
Network Reliability ◽  
Reliability Assessment ◽  
Heat Supply System ◽  
Operating Conditions ◽  
Heat Network ◽  
Heat Networks ◽  
Heat Supply Systems ◽  
Supply Systems

Источником информации о техническом состоянии трубопроводов тепловых сетей объектов магистральных нефтепроводов ПАО «Транснефть» являются результаты их обслуживания и ремонта, технического освидетельствования, гидравлических испытаний и т. д. На основании этих данных проводятся расчеты показателей надежности, по итогам анализа которых осуществляется планирование дальнейшего технического обслуживания и ремонта. Однако при оценке надежности систем теплоснабжения необходимо учитывать не только срок эксплуатации и величину амортизационного износа, но и реальное состояние в конкретных условиях функционирования. Учесть многообразие факторов, которые влияют на работоспособность трубопроводов системы теплоснабжения, и тем самым повысить точность расчетов при оценке их остаточного ресурса позволяет применение кластерного анализа в дополнение к используемой методике оценки надежности тепловых сетей. В рамках настоящей работы оценка надежности объектов АО «Связьтранснефть» с применением кластерного анализа проведена на примере равнозначных участков тепловых сетей двух узлов связи, расположенных в Краснодарском крае и Республике Саха (Якутия). Currently, information about technical condition of pipelines of heat supply systems at the facilities of the main oil pipelines of PJSC Transneft is formed based on the results of maintenance and repair, technical inspection, hydraulic tests, etc. Upon these data, calculations of reliability indicators of heat networks are carried out, based on the analysis of calculations further maintenance and repairs are planned. However, when assessing the reliability of heat supply systems, it is necessary to take into account not only the service life and the amount of depreciation wear of heat network elements, but also their real state in specific operating conditions. The use of cluster analysis in addition to the currently used method of heat network reliability assessment allows us to take into account the variety of factors that affect the operability of pipelines of the heat supply system, and thereby increase the accuracy of calculations when assessing their residual resource. Within the framework of this work, the reliability assessment of Svyaztransneft JSC facilities using cluster analysis was carried out on the example of equivalent sections of heat networks of two communication nodes located in the Krasnodar Territory and the Republic of Sakha (Yakutia).

scholarly journals Problems of organization of operating conditions of large heat supply systems and their solutions based on multilevel modeling

2018 ◽  
Vol 39 ◽  
pp. 03007 ◽  
Author(s):  
Zoya I. Shalaginiva ◽  
Vyacheslav V. Tokarev
Keyword(s):  
Heat Supply ◽  
Information Technologies ◽  
Computing System ◽  
Operating Conditions ◽  
Large Cities ◽  
Hydraulic Conditions ◽  
Large Heat ◽  
Multi Level ◽  
Heat Supply Systems ◽  
Supply Systems

The paper unveils relevance of applying the methodology of multi-level modeling of thermal-hydraulic conditions of heat supply systems (HSS) and the software which are realized in the informationcomputing system “ANGARA-TS”, which make possible development of operating conditions and adjustment measures in HSS of any structure and complexity including non-standard circuit designs. Application of the multi-level modeling of HSS that is based on integration of mathematical models, methods and information technologies allows one to link the main principle of mathematical modeling that contributes to rational correspondence of the degree of mathematical model detail with the goals of its use, and modeling for different purposes. Information-computing system is implemented in a variety of real HSS of large cities in the organization of regimes and development of adjustment activities. The paper describes the experience of using new methods for development of operating conditions of large HSS in real towns.

Fuel Efficiency of Energy Sources in Heat Supply Systems

2018 ◽  
Vol 65 (9) ◽  
pp. 668-676 ◽  
Author(s):  
B. A. Semenov ◽  
E. A. Larin
Keyword(s):  
Heat Supply ◽  
Fuel Efficiency ◽  
Energy Sources ◽  
Heat Supply Systems ◽  
Supply Systems

Use of a turboexpander in steam power units for heat energy recovery in heat supply systems

2016 ◽  
Vol 63 (5) ◽  
pp. 360-366 ◽  
Author(s):  
R. A. Sadykov ◽  
A. Z. Daminov ◽  
I. N. Solomin ◽  
V. A. Futin
Keyword(s):  
Energy Recovery ◽  
Heat Supply ◽  
Heat Energy ◽  
Steam Power ◽  
Heat Supply Systems ◽  
Heat Energy Recovery ◽  
Supply Systems

scholarly journals INDICATORS THERMAL AND HYDRAULIC MODES OF DISTRIBUTION HEAT NETWORKS

2021 ◽  
Vol 3 (163) ◽  
pp. 7-11
Author(s):  
A. Aleksahin ◽  
A. Boblovskii ◽  
K. Miahkokhlib ◽  
Y. Schactnyi
Keyword(s):  
Heat Loss ◽  
Heat Supply ◽  
Heat Losses ◽  
Specific Pressure ◽  
Friction Forces ◽  
Heat Networks ◽  
Pressure Losses ◽  
Central Heating ◽  
Heat Supply Systems ◽  
Supply Systems

The task of heat supply systems is to ensure the quality of services at a minimum cost in the production and transportation of thermal energy. Because the distribution heat networks of district and district systems are characterized by significant branching and significantly longer lengths of heat pipelines compared to the main sections of heating networks, reducing heat loss in these elements of the heating system significantly affects the overall efficiency of district heating. The amount of heat loss depends on the method of laying networks and the diameter of heat pipes, thermal insulation parameters and temperature of the coolant and the environment. Based on the formulas for determining the specific pressure losses to overcome the friction forces obtained from the generalization of these projects of central heating systems of a number of residential districts of Kharkiv, calculated dependences for determining heat losses by supply and return pipelines of the main branches of the heating network. Estimates of accuracy of use of the offered formulas are carried out. The aim of the work is to determine the specific pressure losses for the main branches of heating distribution networks on the basis of generalization of design data for heat supply systems of building groups and clarification of formulas for calculating heat losses by pipelines of central heating distribution system. Based on the generalization of projects for the heating network of residential neighborhoods in Kharkiv, a formula for calculating the specific pressure loss during water movement in the pipelines of the main branches of the heating network depending on the heat load of buildings connected to the branch. Formulas for calculation of heat losses by supply and return pipelines of the main branches of a heating network of the residential district are offered. A comparison of the accuracy of calculations using the proposed formulas with existing methods for determining heat loss in branched heat supply networks, which showed the possibility of using formulas in preliminary assessments of the thermal state of networks.

scholarly journals POTENTIAL OF USING AGRICULTURAL BIORESOURCES FOR RECEIVING HEAT ENERGY

2019 ◽  
Vol 41 (2) ◽  
pp. 78-87
Author(s):  
O. Pshinko ◽  
V. Habrinets
Keyword(s):  
Heat Supply ◽  
Heat Energy ◽  
Agricultural Crops ◽  
Effective Operation ◽  
Heat Supply Systems ◽  
The Cost ◽  
Supply Systems

The possibility, conditions and scope of ensuring the effective operation of heat supply systems during the transition of a part of heat generating capacities to biofuel, taking into account the cost of its delivery, has been comprehensively studied. As biofuels, it is proposed to use waste from major agricultural crops that are grown in the Dnieper region

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