Magazine of Civil Engineering, No.2(46), 2014
Hydraulics. Heat engineering. Building systems



Subject plan
for this half-year

Конференция АВОК

The conference of Russian Association of Engineers for Heating, Ventilation, Air-Conditioning, Heat Supply and Building Thermal Physics (ABOK)

On April, 11th, in Lenexpo the XVI conference of Russian Association of Engineers for Heating, Ventilation, Air-Conditioning, Heat Supply and Building Thermal Physics (ABOK) “Effective HVAC and Heat Supply Systems” took place. There were a lot of presentations of new equipment for building systems and networks.
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Численный анализ влияния инженерных сооружений на тепловые потери бесканальных теплопроводов

V.Yu. Polovnikov, E.S. Glazyrin
Numerical analysis of the impact of engineering constructions on heat loss of channel-free heat pipelines

The work shows the results of mathematical modelling of thermal conditions for channel-free heating network laid in the areas of influence of engineering constructions, as well as the results of numerical analysis of heat losses in the objects under examination. The regularities of heat transfer in the system concerned and the factors influencing intensification of heat losses are revealed.
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Определение толщины теплоизоляции и заглубления подземного трубопровода теплоснабжения в многолетнемерзлых грунтах

M.P. Akimov, S.D. Mordovskoy, N.P. Starostin
Calculating thermal insulation thickness and embedment depth of underground heat supply pipeline for permafrost soils

In this work the authors considered a freezing-and-melting process of soils under the polyurethane-insulated polyethylene heating pipeline, which is used in the regions with permafrost soils. Temperature field dynamics of the “pipeline – soil” system is determined by heat conductivity equation in polar coordinate system. The corresponding two-dimensional Stefan problem is solved by the finite differences method.
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Сравнительный теплотехнический расчет систем верхнего естественного освещения (зенитные фонари и полые трубчатые световоды)

A.K. Solovyev, O.A. Tusnina
A comparative thermal analysis of systems of the upper daylight (clerestory and daylight guidance system)

Daylight guidance systems are quite effective devices. Such systems are able to reduce the artificial lighting costs of a building and improve employees’ work conditions inside. In this paper, a comparative thermal analysis of two types of natural roof lighting systems is presented. The analysis has been performed for a roof equipped with a daylight guidance system, being a more contemporary type of lighting, as well as for a roof  with clerestory, which is a more traditional and widespread type.
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Эксергетический анализ систем вентиляции с утилизацией полной теплоты

I.O. Sukhodub, V.I. Deshko
Exergy analysis of ventilation systems with energy recovery

Thermal, mechanical and chemical components of room air exergy and its change depending on the outside air parameters (temperature, humidity and pressure) have been examined for different periods of the year, using the climatic data for Kiev (IWEC). In winter the thermal component dominates, whereas in summer the chemical one prevails.
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Метод обоснования рационального варианта пунктов мониторинга технического состояния инженерных систем уникальных зданий и сооружений

V.S. Soldatenko, V.N. Kharin
The method to justify rational variant points of monitoring technical condition of engineering systems in unique buildings and structures

While necessarily monitoring technical condition of bearing designs of unique buildings and structures, the same monitoring must be done to the items of their engineering systems. To do so, certain monitoring points are designed. The objective here is to make choice among rational measurement instruments taking into account some resource restrictions and several rationality criteria. It is also necessary to consider great uncertainty conditions of design and creation of unique buildings and structures.  
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Методика расчета и оптимизации работы систем подачи и распределения воды с водозаборными скважинами

O.Y. Pobereznichenko, T.P. Homutetskaya
Calculation method and operation optimization of water supply and distribution systems equipped with water wells

In the paper, there has been proposed a method of hydraulic and feasibility studies for water systems equipped with water wells which allows determining the optimal set of system structures and the most efficient regimes of their joint performance during operation. Some of the most difficult for hydraulic and feasibility calculations are water supply and distribution systems (hereinafter - SPRV), which contain water wells with borehole pumps.
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