Magazine of Civil Engineering, No.2(46), 2014
engineering. Building systems
for this half-year
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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V.Yu. Polovnikov, E.S. Glazyrin
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
M.P. Akimov, S.D.
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
A.K. Solovyev, O.A. Tusnina
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.
I.O. Sukhodub, V.I. Deshko
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.
V.S. Soldatenko, V.N. Kharin
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.
O.Y. Pobereznichenko, T.P. Homutetskaya
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.