Magazine of civil engineering,
Engineering services and networks of buildings
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Hydraulics and engineering hydrologyIn the end of 2010 on the Faculty of Civil Engineering of Saint-Petersburg State Polytechnical University the sessions of dissertation councils took place. Including, two PhD thesises has been defended in speciality "Hydraulics and Engineering Hydrology". This speciality is basic one for experts in engineering services and networks of buildings.
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Heating, Ventilation and Air ConditioningFrom 2th till 4th February at St.-Petersburg State University of Architecture and Civil Enginering (SPbGASU) the annual 68th Scientific conference of professors, teachers, science officers, engineers and post-graduate students of the University took place. In the session "Heating, Ventilation and Air Conditioning" research workers and post-graduated students of SPbGASU post-graduated students and undergraduates of Saint-Petersburg State Polytechnical University (SPbSTU) participated.
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N.I. Vatin, A.V. Ulybin, V.M. Ogorodnik
1st of January, 2011 in Russian Federation new normative document GOST
R 53778-2010 regulating the activity in survey of buildings took
effect. It is the first state standart (GOST) for survey in our
country. Heretofore the basic documents were SP 13-102-2003 for all
objects and RD 22-01-97 for objects in the field of industrial security.
In the paper the padding
investment costs and decrease of the consumption on a thermal energy
reviewed at salvaging a heat of exhausting air under the scheme with
heat carrier in systems of mechanical ventilation. The nature of
the data of costs from a factor of temperature efficiency of heat
parsed. The expression for optimum temperature efficiency is offered by
minimization of cumulative discounted costs during given computational
The paper considers using of a multizone central air-conditioning
system with chilled beams for increase power efficiency of a building.
In a transition period (spring, autumn) in a building there are both
surplus of heat in one premises, and shortage of heat in others. At the
expense of use low-temperature circuit and chilled beams of type
"water-air" surpluses of heat are transferred in premises with
shortages of heat and on the contrary.
E.M. Titova, O.V. Averyanova
In this article on the
example of indoor pool the most economically efficient variant of
parameters for high humidity areas has been selected. The calculation
operating, capital and reduced costs has been done. The reliability
efficiency evaluating of the systems also have been done.
A.G. Sotnikov, A.P. Rusakov
It is known that heating is Achilles heel of HVAC systems by accident
rate. The aim of this research is processes modelling and investigation
of quantity parameters influence on heating and cooling subsystem of
VAC systems when balancing that subsystem by various balanced valves
and when controlling it by three-way valve. The result of the work are
trim and adjustment characteristics of concerned subsystem in general
view under various work conditions and their further
N.I. Vatin, V.N. Chechevickin, A.V. Chechevickin
The basic sources of pollution of the air environment in megapolises,
and also of internal atmosphere of premises for people habitation, in
respect of their possible clearing by sorption-catalytic methods are
systematized. Design and principle of action of the room
sorption-catalytic three-chambered filter for clearing of turnaround
air of a thermo premise of gaseous ammonia, hydrogen sulfide, carbon
dioxide and organic substances are described.
N.I. Vatin, A.S. Gorshkov, A.V. Glumov
The diagrams of partial
(maximum and actual) pressure distributions of water steam along the
of the tested homogeneous outside walls are provided. Calculations and
were done for both the coldest month of the year and the coldest
period, i.e. under the worst climate conditions. The essential patterns
influence of plastering covering charactristics (thickness, density,
permiability coefficient) on humidity accumulation processes in walls
A.S. Noskov, A.V. Lovtsov, A.V. Hait, A.P. Butimova,
Heat flow generation
systems take one of the first positions in the list of the greatest
consumption systems. This is heating and cooling of the rooms, freezing
chambers etc. Climatic system of the refrigerating industrial
complex is considered in article. Competitiveness
heating and cooling systems based on vortex tubes compared with
N.S. Kharkov, M.V. Chamkina, M.R. Petrichenko
Research of losses of a
pressure on length hydraulically smooth cylindrical pipe is presented
intensity of curling of a flow of a viscous incompressible liquid.
coefficient of a hydraulic friction in
comparison with a forward flow in the field of values of integral
parameter of curling is
revealed. The extreme properties of the screw movements
specifying a possibility of realization of advantages slightly of the
stream are considered. Analytical estimations and results of an
research are presented.
According to conventional diagram of the flow past cylinder, dissipated
power in the part of potential flow, formed by windward side of
cylinder is calculated. Comparison of this power with the power,
required to overcome the resistance to motion of the cylinder, shows
that thin boundary layer in windward side of cylinder forms under
Reynolds numbers exceeded 100.
Aim of heat exchanger work in frost-free season
is indirect cooling of incoming air before its input into
premises. It is possible if exhaust air is cooled before its input into
heat exchanger .
In the article the operational principle of air conditioning system
with using of adiabatic air cooling is considered. The data concerned
system functioning depending on parameters of microclimate in
maintainable premises are given.
Taking into consideration that there is not definite differentiation
between definitions "economy of energy" and "energy saving",
often the effect of energy effective technologies can be received only
by reduction of air exchange, that is breach of sanitary and hygienic
regulations. In the article the attempt to distinguish these
definitions with using system approach is done.