scholarly journals Application of monolithic foam concrete in building envelopes of a cottage, used in conditions of intermittent heating

2018 ◽  
Vol 196 ◽  
pp. 04015 ◽  
Author(s):  
Yuri Vytchikov ◽  
Mikhail Saparev ◽  
Vladislav Golikov
Keyword(s):  
Specific Energy Consumption ◽  
Thermal Characteristics ◽  
Outer Wall ◽  
Heating Time ◽  
Review Literature ◽  
Building Envelope ◽  
Foam Concrete ◽  
Building Envelopes ◽  
Insulating Layer ◽  
Intermittent Heating

The paper focuses upon the peculiarities of application of monolithic foam concrete as a heat-insulating layer in building envelopes of houses used in conditions of intermittent heating. The researchers analyze thermal characteristics, review literature describing the application of foam concrete in construction and demonstrate this material applicability at outer walls insulating, taking buildings and constructions with variable thermal behaviour as an example. The paper outlines main criteria that building envelopes of such structures should meet. To assess the effectiveness of monolithic foam concrete in building envelopes application, the authors carried out thermo-technical calculation of the outer walls, insulated with monolithic foam concrete. The graphs of dependence of multilayer building envelope heating time upon thickness of a heat-insulating layer and upon heat transmission resistance of the construction was obtained on the basis of these calculations. The dependence of specific energy consumption upon the heating time is also given in the paper. The study reveals the optimal range of thickness and density of monolithic foam concrete for insulating outer walls of buildings, used in in conditions of intermittent heating. This calculation also proves that the application of foam concrete as an insulant on the inside of the outer wall makes it possible to reduce the load on the building foundation.

scholarly journals USE OF MONOLITHIC FOAM CONCRETE IN ENCLOSING STRUCTURES OF BUILDINGS AND STRUCTURES WITH VARIABLE THERMAL CONDITIONS

2018 ◽  
Vol 8 (4) ◽  
pp. 10-14 ◽  
Author(s):  
Yury S. VYTCHIKOV ◽  
Mikhail Ye. SAPAREV ◽  
Vladislav A. GOLIKOV
Keyword(s):  
Heat Transfer ◽  
Thermal Conditions ◽  
Outer Wall ◽  
Engineering Calculation ◽  
Heating Time ◽  
Thermal Engineering ◽  
Foam Concrete ◽  
Insulating Layer ◽  
Optimum Range ◽  
Resistance To Heat

This article considers the features of the use of monolithic foam concrete as a heat-insulating layer in the building enveloping structures of buildings operated under intermitt ent heating conditions. To assess the eff ectiveness of the use of monolithic foam concrete in building enveloping structures, a thermal engineering calculation of the outer wall, insulated with the use of monolithic foam concrete, was carried out. Based on the calculations carried out by the authors, graphs of the dependence of the heating time of multilayered enclosing structures on the thickness of the heat-insulating layer and the reduced resistance to heat transfer of the structure were obtained. The optimum range of thicknesses and densities of monolithic foam concrete for thermal insulation of external walls of buildings, operated in conditions of intermitt ent heating, is off ered. This calculation also showed that the use of foam concrete as a heater from the inside of the outer wall can reduce the load on the foundation of the building.

scholarly journals INVESTIGATION OF THE EFFECT OF THE DENSITY OF MONOLITHIC EXPANDED-CLAY CONCRETE ON THE ENERGY EFFICIENCY OF BUILDINGS OPERATED UNDER VARIABLE HEAT MODE

2019 ◽  
Vol 9 (3) ◽  
pp. 50-55
Author(s):  
Mikhail E. SAPAREV ◽  
Yury S. VYTCHIKOV ◽  
Andrey S. PRILEPSKY ◽  
Maxim I. URYADOV
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Lightweight Concrete ◽  
Specific Energy Consumption ◽  
Thermal Characteristics ◽  
Outer Wall ◽  
Heat Mode ◽  
Calculation Results ◽  
The Impact ◽  
Made In

This article presents the results of a theoretical study of the impact of the density of monolithic expanded clay concrete on the specific energy consumption in the operation of the cottage building in conditions of intermittent heating. In view of the fact that the outer walls are made in the form of well masonry of various materials, in order to simplify the solution of the problem, averaging of their main thermal characteristics is made. In determining the effect of heating the outer wall and the specific energy used the author's approximate analytical method, convenient for engineering calculations. The study showed that the use no-fine expanded-clay lightweight concrete significantly reduces the specific energy consumption compared to conventional large-porous expanded clay. The lowest energy consumption according to the calculation results refers to the minimum density of sandless no-fine expanded-clay lightweight concrete, equal to 300 kg/m3.

Influence Analysis of Cold Formed Steel Members on Thermal Characteristics of Building Envelopes

2014 ◽  
Vol 670-671 ◽  
pp. 466-473 ◽  
Author(s):  
Galina Kashevarova ◽  
Pavel Kosykh
Keyword(s):  
Thermal Characteristics ◽  
Internal Surface ◽  
Building Envelope ◽  
Building Envelopes ◽  
Full Scale Experiment ◽  
Steel Members ◽  
Cold Formed Steel ◽  
Coefficient Of Uniformity ◽  
The Difference ◽  
Scale Experiment

The article in question presents the comparison of thermo-protective characteristics of building envelopes constructed on the basis of cold formed steel members according to the results of computer modeling, engineering methods and full-scale experiment. Two comparative parameters were chosen: the coefficient of uniformity and the difference in temperatures of the construction internal surface. The influence of various “input” parameters (thickness, insulation thermo conduction and etc.) on thermo-protective characteristics has been analyzed. The asymptotical character of connection between thermo resistance of non-uniform building envelope and insulation thermo conduction has been deduced.

OPTIMIZATION OF HEAT-SHIELDING CHARACTERISTICS OF THE EXTERIOR WALLS OF COUNTRY COTTAGES, INSULATED WITH MONOLITHIC FOAM CONCRETE

2018 ◽  
Vol 8 (3) ◽  
pp. 22-25
Author(s):  
Yury S. VYTCHIKOV ◽  
Mikhail Ye. SAPAREV ◽  
Vladislav A. GOLIKOV
Keyword(s):  
Heat Transfer ◽  
Outer Wall ◽  
Heating Time ◽  
Exterior Wall ◽  
Foam Concrete ◽  
Transfer Resistance ◽  
Warm Up ◽  
Shielding Properties ◽  
Heat Shielding ◽  
Resistance To Heat

The heat-shielding properties of three-layer external walls insulated with monolithic foam concrete are considered in the article. The temperature is given in rooms operated in intermitt ent heating conditions. An optimal exterior wall design is proposed using monolithic foam concrete for the construction of country cott ages. For this design, the results of heat engineering calculations are presented using the analytical dependence of determining the heat transfer resistance, which ensures the minimum warm-up time of the wall. The results of the calculation are presented in tabular form for a given heating time and density of foam concrete. Also a relationship is described to determine the maximum allowable resistance to heat transfer of the outer wall at diff erent densities of monolithic foam concrete.

scholarly journals Comprehensive Restoration of the Normative Technical Condition of Expanded Clay Concrete Panels of Industrial Buildings with Moral and Physical Wear

2020 ◽  
Vol 23 (6) ◽  
pp. 77-89
Author(s):  
S. V. Dubrakov ◽  
A. V. Masalov ◽  
I. V. Zavalishin
Keyword(s):  
Thermal Characteristics ◽  
Technical Condition ◽  
Building Envelope ◽  
Technical Solution ◽  
Building Structures ◽  
Infrastructure Development ◽  
Proper Position ◽  
Building Envelopes ◽  
Industrial Buildings ◽  
Engineering Survey

Purpose of reseach is  determining the category of technical condition of building structures to assess the residual resource and service life of industrial facilities and urban infrastructure. Development of a fundamental technical solution to the problem of comprehensive restoration of a workable technical condition of building envelopes, including the provision of mechanical and heat engineering requirements.Methods. According to the current regulatory requirements for buildings put into operation, it is necessary to conduct an engineering survey at least once every 10 years. During the engineering survey of the building located at Kursk region, Kurchatovsky district, K. Libknekhta village, ul. Mira 1, significant defects and damages affecting the technical condition of the building envelope were revealed.Results. According to the results of studies, some factors were identified that need to be eliminated. The ways of solving the identified problems and defects associated with the building envelope are given and described in detail to restore the building to its proper position.Conclusion. When conducting surveys of building structures of buildings and structures, it is necessary to pay attention not only to strengthening building structures, but also to restoring the thermal characteristics of building envelopes and bringing them into line with the requirements of current regulatory documents. To accomplish this task, a reinforcement design has been developed that creates the necessary reinforcement and brings the thermal characteristics of the building envelope in line with modern requirements to ensure the necessary energy efficiency of the building envelope. 

scholarly journals Experimental Study on the Thermal Behavior of Exterior Coating Textures of Building in Hot and Arid Climates

2021 ◽  
Vol 13 (8) ◽  
pp. 4175
Author(s):  
Islam Boukhelkhal ◽  
Fatiha Bourbia
Keyword(s):  
Energy Consumption ◽  
Surface Temperature ◽  
External Surface ◽  
Thermal Characteristics ◽  
Energy Performance ◽  
Building Envelope ◽  
Interior Space ◽  
Design Elements ◽  
Aesthetic Appearance ◽  
Reduction Of Energy Consumption

The building envelope is the barrier between the interior and exterior environments. It has many important functions, including protecting the interior space from the climatic variations through its envelope materials and design elements, as well as reduction of energy consumption and improving indoor thermal comfort. Furthermore, exterior building sidings, in addition to their aesthetic appearance, can have useful textures for reducing solar gains and providing good thermal insulation performance. This research examined and evaluated the effect of external siding texture and geometry on energy performance. For this objective, a field in situ testing and investigation of surface temperature was carried out on four samples (test boxes) with different exterior textures and different orientations, under the climate zone of Constantine–Algeria during the summer period. The results indicated significant dependability between the exterior texture geometry, the percentage of shadow projected, and external surface temperature. The second part of the research involved a similar approach, exploring the effect of three types of particles with the same appearance but with different thermal characteristics. It was concluded that the natural plant aggregates “palm particles” had the best performance, which contributed to a significant reduction of external surface temperature reaching 4.3 °C, which meant decreasing the energy consumption.

scholarly journals BIM and BEM Methodologies Integration in Energy-Efficient Buildings Using Experimental Design

Buildings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 491
Author(s):  
Jorge González ◽  
Carlos Alberto Pereira Soares ◽  
Mohammad Najjar ◽  
Assed N. Haddad
Keyword(s):  
Experimental Design ◽  
Energy Efficient ◽  
Thermal Characteristics ◽  
Energy Performance ◽  
Building Envelope ◽  
Climatic Zones ◽  
Energy Efficient Buildings ◽  
Energy Modelling ◽  
Building Information ◽  
Energetic Performance

Linking Building Information Modelling and Building Energy Modelling methodologies appear as a tool for the energy performance analysis of a dwelling, being able to build the physical model via Autodesk Revit and simulating the energy modeling with its complement Autodesk Insight. A residential two-story house was evaluated in five different locations within distinct climatic zones to reduce its electricity demand. Experimental Design is used as a methodological tool to define the possible arrangement of results emitted via Autodesk Insight that exhibits the minor electric demand, considering three variables: Lighting efficiency, Plug-Load Efficiency, and HVAC systems. The analysis concluded that while the higher the efficiency of lighting and applications, the lower the electric demand. In addition, the type of climate and thermal characteristics of the materials that conform to the building envelope have significant effects on the energetic performance. The adjustment of different energetic measures and its comparison with other climatic zones enable decision-makers to choose the best combination of variables for developing strategies to lower the electric demand towards energy-efficient buildings.

scholarly journals A Comparison Of Building Envelope Performance Levels Between Ontario, Denmark, Germany And The Passive House Standard, In The Low-Rise, Residential Context

2021 ◽  
Author(s):  
Blaine Attwood
Keyword(s):  
Energy Use ◽  
Building Envelope ◽  
Passive House ◽  
Building Envelopes ◽  
Residential Sector ◽  
Greater Toronto Area ◽  
Residential Context ◽  
Minimum Requirements ◽  
Other World ◽  
House Standard

This research compared and analyzed where the Ontario Building Code rates in the low-rise, residential sector in terms of its: in comparison to Denmark, Germany and the Passive House Standard. This was analyzed to see how Ontario compared against other world renowned energy efficient regulations and where or if there was room for improvement. For this, HOT2000 and THERM were utilized on all four of the reference standards, where both of these programs were managed in a way to compare the results of ‘typical’ building envelopes and the current regulation from each of the standards. These results were then able to provide a whole home’s heating and air conditioning energy use in the Greater Toronto Area climate. Overall, the results illustrated Ontario homes consume the most energy for both typically constructed homes and homes utilizing the minimum requirements. In addition to this, Ontario also had the least performing building envelope connection details. In total, the Passive House performed at the highest level followed by Germany, Denmark and then Ontario.

scholarly journals Influence of airtightness of steel sandwich panel joints on heat losses

2020 ◽  
Vol 172 ◽  
pp. 05008
Author(s):  
Markus Kuhnhenne ◽  
Vitali Reger ◽  
Dominik Pyschny ◽  
Bernd Döring
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Building Envelope ◽  
The Finite Element Method ◽  
Transmission Losses ◽  
Building Envelopes ◽  
Metal Building ◽  
Effective Heat Transfer Coefficient ◽  
The Heat Transfer Coefficient

Energy saving ordinances requires that buildings must be designed in such a way that the heat transfer surface including the joints is permanently air impermeable. The prefabricated roof and wall panels in lightweight steel constructions are airtight in the area of the steel covering layers. The sealing of the panel joints contributes to fulfil the comprehensive requirements for an airtight building envelope. To improve the airtightness of steel sandwich panels, additional sealing tapes can be installed in the panel joint. The influence of these sealing tapes was evaluated by measurements carried out by the RWTH Aachen University - Sustainable Metal Building Envelopes. Different installation situations were evaluated by carrying out airtightness tests for different joint distances. In addition, the influence on the heat transfer coefficient was also evaluated using the Finite Element Method (FEM). The combination of obtained air volume flow and transmission losses enables to create an "effective heat transfer coefficient" due to transmission and infiltration. This summarizes both effects in one value and is particularly helpful for approximate calculations on energy efficiency.

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