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pressure system [19, 20]. New gas-regulating stations and cabinet-type regulating stations should be in place as well as telemechanization and automization of technological processes associated with gas supply. The equipment of gas-regulating stations should be examined in a timely manner with an emphasis on combined pressure regulators.

New construction areas as proposed by the general plan of the city of Voronezh are supplied with gas from the existing gas-regulating stations (Fig.).

Chistoye

Chistoye

GRS

Krasnolesniy

Vodokachka

Zemlyansk

Semiluki GRS

Kursk

TES

Ostrogozhsk

Fig. Gas supply scheme of the city of Voronezh with the marked construction areas up to 2020: I—V are predicted construction areas

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According to the above scheme and principles of energy equivalence [1, 4], a model of an excited condition of a gas supply system [6, 13] was designed in five possible construction areas. As a result of the calculations, the hypothesis was proved of a sufficient capacity of the five gasregulating stations for a predicted construction site. Each area was considered individually and joined to the nearest GRS. The studies showed that there is no need to build an extra GRS.

According to the general plan, the total gas consumption in the areas is currently 199458 nm3/h.

The general plan of the municipal design of the city area and planning restrictions of the urban resources up to 2020 proposes 5 major areas of residential construction (see Fig.):

––central area (construction with random high-rises and reconstruction) with the total area of 3000 thousand m2;

––area around the Voronezh State Technical University. The northern construction site and new construction (industrial park) with the total area of 1720 thousand m2;

––the estuary of the River Done is the western area of residential construction on a flush with the total area of 3630 thousand m2;

––Shilovo is the second South-West area (of priority construction) with the total area of 2250 thousand m2;

––Otradnoe district is the eastern area (left bank) with the total area of 2625 thousand m2.

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There is no gas supply deficit in Voronezh. Despite the fact that an new construction is set to take place, the maximum total capacity of the GRA is sufficient for it to supply gas considering resources for further development. District division of the construction area up to 2020 is presented in Table 4. There are arrangements being made as to how likely the construction is to occur till 2035.

Gas is supplied to a cottage and 3—7-storey construction. Taking everything into account, a system of program measures is set forth.

In order to optimize the gas supply in the city of Voronezh and make the gas regulation more intense, a series of reconstruction and modernization efforts has to be made including stage- by-stage development.

According to the findings of the processing statistical data on the gas supply systems of the city in 2010, 2015 and 2017, a series of measures to improve the reliability of the gas supply of the city of Voronezh has to be taken up until 2035 (Table 5).

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Conclusions

1.Therefore the paper looked at the current state of the gas supply system in Voronezh in detail. The authors have come up with a series of comprehensive measures for implanting “The Strategies of Social and Economiс Development of the Voronezh Region Up To 2035”. The above measurements generated by a new construction [10, 11], increased reliability of the gas pipelines, requirements for emergency-free [15] and continuous operation of the areas of the gas network are the outcomes of the collection of the statistical data on the gas supply in the city of Voronezh from 2011 to 2017.

2.All of the suggested measures have been agreed on and taken on board by Ltd. “Gazprom Gas Distribution Voronezh”. The proposed series of measures is essential for implementing the program by the Department of Economic Development of the Voronezh region “Strategies of Social and Economic Development of the Voronezh Region Up to 2035”.

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UDC662.99 : 004.42

N. A. Petrikeeva1, D. M. Chudinov2, Ye. A. Kopytina3, O. A. Sotnikova4

VERSION OF THE SOLUTION

OF THE PROBLEM OF OPTIMIZATION OF THICKNESS

OF THE HEAT-INSULATION LAYER IN HEAT SUPPLY

Voronezh State Technical University

Russia, Voronezh

1PhD in Engineering, Assoc. Prof. of the Dept. of Heat and Gas Supply and Oil and Gas Business, tel.: (473)271-53-21, e-mail: petrikeeva.nat@yandex.ru

2PhD in Engineering, Assoc. Prof. of the Dept. of Heat and Gas Supply and Oil and Gas Business, tel.: (473)271-53-21, e-mail: dmch_@mail.ru

4D. Sc. in Engineering, Prof., Head of the Dept. of Designing of Buildings and Structures Named after N. V. Troitskii,

tel. (473)277-43-39, e-mail: ksenija.sotnikova@yandex.ru Voronezh State University

Russia, Voronezh

3PhD student of Dept. of Information Technologies of Management, tel.: +7-952-101-72-96, e-mail: zhemkaterina@yandex.ru

Statement of the problem. With an increase in the thickness of isolation costs of a construction and operation of the heat-insulated pipeline increase as well. At the same time heat losses, and thus annual costs of the lost warmth decrease. The solution of a task comes down to the minimization of the function of expenses of a working option.

Results. In the paper the optimum thickness of thermal isolation of a water heating system taking into account the criterion of the minimum value of the specific given expenses with use of the known algorithm is determined. As the problem of optimization depends on a large number of variables, it is expedient to solve it using software.

Conclusions. One of the options for calculating the optimum thickness of thermal isolation on the computer by means of the program for the work with the spreadsheets Microsoft Excel including VBA macroprogramming language is offered. The results received during the work with the program can be used for further engineering calculations.

Keywords: thermal isolation, search of an optimal solution, thermal networks, software, algorithm, macroprogramming language.

Introduction. For identifying the directions for the middle and long-term development of a country’s fuel and energy complex for their comprehensive comparative assessment, it is

© Petrikeeva N. A., Chudinov D. M., Kopytina Ye. A., Sotnikova O. A., 2018

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