75504 2712-8172 8 52 2014 1-68

CHR RUS 5-8 Peter the Great Saint Petersburg Polytechnic University Yakubson Vera engstroy@inbox.ru

Polytechnicheskay, 29

Energy efficiency of building envelope November, 12–13th, in Saint-Petersburg the 7th International congress "Energy efficiency. XXI century" took place. The reports were done in breakuo groups according to the various aspects of energy efficiency challenge: HVAC systems, water supply and sewerage systems, gas supply, energy metering. One of the grourps was devoted to thermophysics of buildings and energy effective design of building envelope. 10.5862/MCE.52.1 energy efficiency energy saving building envelope insulating glass unit thermal performance of buildings heat recovery system https://engstroy.spbstu.ru/article/2014.52.1/ 01.pdf

RAR RUS 9-19 Yuri Gagarin State Technical University of Saratov Golova Tatyana emelyanova-tanya@mail.ru Yuri Gagarin State Technical University of Saratov Denisova Alla Energy efficiency of the Rural Wall multi-layer structure in lowrise building design This paper presents the study on energy efficiency of various wall design solutions and a new multi-layer wall design for low-rise construction as well as the thermovision results for multi-layer and single-layer envelopes. Indoor climate parameters for various wall design solutions were determined. The study reveals the optimal wall design solutions and specifies the theoretical assessment of their energy efficiency in compliance with Russia's national building code 23-02-2003. The paper presents calculations of building heat loss through the exterior building envelope, reduced thermal resistance of walls and total heat loss of the building with the selected outer wall design during the heating season. Recommendations on the application of the new multi-layer wall design using local wall materials in the construction of energy-efficient low-rise buildings were developed. The recommendations include requirements for wall materials, for thermal calculations , production guidelines, physical and mechanical properties of wall layers. 10.5862/MCE.52.2 energy saving wall design solutions in low-rise buildings thermal and moisture conditions of building envelopes https://engstroy.spbstu.ru/article/2014.52.2/ 02.pdf

RAR RUS 20-24 Peter the Great Saint Petersburg Polytechnic University Osipov Ilya osipov.mr@gmail.com

Polytechnicheskay, 29

Peter the Great Saint Petersburg Polytechnic University Zybina Olga ozakata@mail.ru

Polytechnicheskay, 29

Increase in fire resistance of building expansion joints via intumescent sealant composition In this paper, we consider the possibility of increasing the fireproof efficiency of the intumescent sealant composition for the heat-insulating unit when sealing expansion joints between concrete elements. Fire protection of building structures is a part of the general system of measures to ensure fire safety and fire resistance of buildings and structures. It aims to reduce the structures’ fire hazard and provide them with the required fire resistance. The main objectives of fire protection are: fire prevention, initial flame breakdown, reduction of fire hazards and fire localization. The material we developed may be used to seal closed and drained exterior wall joints or fire control elements; connections between reinforced concrete and bricks; local sealing of various types of cavities with prescribed fire resistance and so on. 10.5862/MCE.52.3 intumescent materials fireproof sealant fire protection of building structures https://engstroy.spbstu.ru/article/2014.52.3/ 03.pdf

RAR RUS 25-37 56352359500 0000-0002-5156-7352 Volgograd State Technical University Sergey Korniyenko svkorn2009@yandex.ru

28, Lenina Ave., Volgograd, Russia, 400005

Multifactorial forecast of thermal behavior in building envelope elements Thermal performance of buildings is the key aspect of energy saving and energy efficiency enhancement. The thermal behavior of a building is formed under the influence of many factors. The complexity of the process of heat transfer through envelope structures makes the problem of multifactorial assessment of thermal behavior in building envelope elements crucial. This paper presents an assessment of the heat-insulating effect gained from the use of the “ceramic microspheres – binder” composite coating as additional thermal protection of the combined unventilated covering of a building. This multifactorial assessment is based on the calculation method of measuring thermal behavior in building envelope elements developed by the author. It was shown that the application of the composite coating has almost a zero heat-insulating effect and does not provide a normalized level of thermal performance of the enclosing structure during the cold season. In the meantime, the application of mineral wool slabs as the traditional heat insulation for the basic construction allows enhancing thermal properties of the construction to a specified value. Such heat insulation is best for the building thermal capacity, providing a minimum heat gain during the warm season. 10.5862/MCE.52.4 building thermal performance building envelope element calculation method software mathematical simulation “ceramic microspheres – binder” composite coating https://engstroy.spbstu.ru/article/2014.52.4/ 04.pdf

RAR RUS 38-49 15730895100 http://orcid.org/0000-0003-3251-3356 Saint Petersburg State University of Industrial Technologies and Design Gorshkov Alexander alsgor@yandex.ru

St. Petersburg, Russia

Military Space Academy named after A.F. Mozhaysky Rymkevich Pavel rymkewitch@yandex.ru M-6585-2013 6508103761 0000-0002-1196-8004 Peter the Great Saint Petersburg Polytechnic University Vatin Nikolai vatin@mail.ru

Polytechnicheskay, 29

Simulation of non-stationary heat transfer processes in autoclaved aerated concrete-walls This paper shows the influence of mortar joints on the thermal resistance of external walls made of autoclaved aerated concrete blocks. Due to the fact that the thermal conductivity of cement mortars and adhesives is significantly higher than the thermal conductivity of autoclaved aerated concrete products, their effect must be considered when designing the walling. The article contains a table of thermotechnical uniformity coefficients of aerated concrete walls depending on the thickness and thermal conductivity of mortar joints. The work describes the simulation of heat transfer in stationary and non-stationary conditions. In the case of unsteady heat transfer, the influence of masonry joints on the thermal resistance of the enclosing structure was considered. Thermal resistance was characterized by the range of temperatures and the estimated damping of range of temperatures. There was calculated a correction value for the effect of mortar joints on the complex damping coefficient of estimated range of temperatures. 10.5862/MCE.52.5 autoclaved aerated concrete (ААС) unreinforced autoclaved aerated concrete products adhesive for aerated concrete small-block wall masonry mortar mortar joints thermal conductivity stationary heat transfer https://engstroy.spbstu.ru/article/2014.52.5/ 05.pdf

RAR RUS 49-56 Kazan National Research Technological University Ubaydulloyev Madzhid madgidpwn@rambler.ru Calculations of strengthened open profile thin-walled element enclosing structures This paper presents the variational calculation method for open profile thin-walled bar systems strengthened under load. The main ratios of the theory are given. The calculation of the stress-strain state of the strengthened structure consists of the following stages: 1. Determining repair stress and strain in the elements of the bar system under the influence of repair loadings; 2. Calculating the stressstrain state of the structure after strengthening, allowing for the effect of operational loadings and repair stresses. Based on the stated method a computer program was developed. The program can be used to simulate the work of the strengthened structure and monitor its stress-strain state at different strengthening stages. The results of of the strengthened thin-walled bar system calculations are presented, allowing for stress and strain at different strengthening stages. 10.5862/MCE.52.6 thin-walled bar systems strengthening stress-strain state repair stress variational method https://engstroy.spbstu.ru/article/2014.52.6/ 06.pdf