scholarly journals Selection of optimal thickness of thermal insulation of modular buildings on the basis of multicriterial analysis

2020 ◽  
pp. 82-91
Author(s):  
V. Zhelykh ◽  
◽  
Yu. Furdas ◽  
S. Shapoval ◽  
M. Rebman ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Multicriteria Analysis ◽  
Theoretical Research ◽  
Expert Assessment ◽  
Insulation Material ◽  
Modular Construction ◽  
Optimal Thickness ◽  
Short Period ◽  
Modular Buildings ◽  
Selection Of

Today modular construction is gaining popularity in the arrangement of production facilities. The purpose of the research is the theoretical substantiation of the choice of the optimal thickness of thermal insulation for external protections of modular buildings taking into account the evaluation criteria based on the method of hierarchy analysis. The article reflects the possibility of using modular buildings for residential and public needs. Given the peculiarities of the use of thermal insulation materials, such structures are erected in a short period of time due to the use of ready-made modules. It is also proposed to use multicriteria analysis to compare different thicknesses of thermal insulation of a modular building. The obtained results are presented in the form of petal diagrams and diagrams of global priorities, which made it possible to make an in-depth assessment of several thicknesses of thermal insulation. When conducting theoretical research, it should be noted that the importance of each of the criteria was taken into account for the selection of thermal insulation. An expert assessment was performed to determine the thickness of thermal insulation, which can be used for lightweight prefabricated structures of modular buildings. As a result of research, it was found that the most suitable thermal insulation material is polyurethane.

scholarly journals Genetic Algorithm Applied to Multi-Criteria Selection of Thermal Insulation on Industrial Shed Roof

Buildings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 238 ◽  
Author(s):  
Stamoulis ◽  
Santos ◽  
Lenz ◽  
Tusset
Keyword(s):  
Genetic Algorithm ◽  
Thermal Comfort ◽  
Thermal Insulation ◽  
Optimization Technique ◽  
Building Envelope ◽  
Expanded Polystyrene ◽  
Insulation Material ◽  
Clothing Insulation ◽  
Climate Conditions ◽  
Selection Of

The rational use of energy has motivated research on improving the energy efficiency of buildings, which are responsible for a large share of world consumption. A strategy to achieve this goal is the application of optimized thermal insulation on a building envelope to avoid thermal exchanges with the external environment, reducing the use of heating, ventilation and air-conditioning (HVAC) systems. In order to contribute to the best choice of insulation applied to an industrial shed roof, this study aims to provide an optimization tool to assist this process. Beyond the thermal comfort and cost of the insulation, some hygrothermic properties also have been analysed to obtain the best insulation option. To implement this optimization technique, several thermo-energetic simulations of an industrial shed were performed using the Domus software, applying 4 types of insulation material (polyurethane, expanded polystyrene, rockwool and glass wool) on the roof. Ten thicknesses ranging from 0.5 cm to 5 cm were considered, with the purpose of obtaining different thermal comfort indexes (PPD, predicted percentage dissatisfied). Posteriorly, the best insulation ranking has been obtained from the weights assigned to the parameters in the objective function, using the technique of the genetic algorithm (GA) applied to multi-criteria selection. The optimization results showed that polyurethane (PU) insulation, applied with a thickness of 1 cm was the best option for the roof, considering the building functional parameters, occupant metabolic activity, clothing insulation and climate conditions. On the other hand, when the Brazilian standard was utilized, rock wool (2 cm) was considered the best choice.

scholarly journals Aplikácia analytickej viacúrovňovej metódy pri výbere zatepľovacieho materiálu

2020 ◽  
Vol 19 (2) ◽  
pp. 21-26
Author(s):  
Michaela Horváthová ◽  
◽  
Linda Makovická-Osvaldová
Keyword(s):  
Thermal Insulation ◽  
Ignition Time ◽  
Insulation Material ◽  
Thermal Coefficient ◽  
Multilevel Method ◽  
Insulation Materials ◽  
Applied Method ◽  
Selection Of

The article deals with the selection of four types of insulation material based on the particular criteria. Specifically, it will be a matter of decision among facade insulation materials. We chose four species of the most used thermal insulation materials that are available on the market and are used frequently. The applied method is an analytical multilevel method that allows us to divide the whole problem into hierarchies and then compare two elements together and thus gain the weights of the criteria. Subsequently, we assessed the alternatives. The selected criteria are the price of the material, the thermal coefficient conductivity, flammability class and ignition time of the sample. The method is verified in the software BPMSG AHP priority calculator.

scholarly journals THE CONSTRUCTIVE AND ECONOMIC VALUE OF HOUSE INSULATION

2020 ◽  
Vol 10 (86) ◽  
Author(s):  
Oleksandr Hrytsenko ◽  
◽  
Iryna Burmenska ◽  
Vladyslav Buchko ◽  
◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Economic Effect ◽  
Mineral Wool ◽  
Insulation Material ◽  
Energy Prices ◽  
Building Stock ◽  
High Quality ◽  
Peace Of Mind ◽  
Short Period ◽  
The City

The article considers several different options for materials for external wall insulation and their advantages from an economic and structural point of view, taking into account the characteristics of some of the most popular insulation and the feasibility of use in a given case. Currently, energy saving and reducing the use of fuel resources is one of the most pressing issues, both in the construction of new buildings and in the case of reconstruction of the existing building stock and means the need to have structures that will minimize heat loss. It is understood why high-quality thermal insulation is an investment for many years in the conditions of unstable energy prices and the economic advantages of reliable insulation from different directions are described. The comparative technical characteristics of the most popular materials of polyfoam and mineral wool in thermal insulation of walls are given, features of their use in different conditions are analyzed, the average prices for the device for the city of Kiev are compared. For a cheaper option, the calculation of the economic effect for the city of Kyiv is performed. It is determined that one of the most important factors of comfortable life is maintaining a comfortable microclimate in the building for many years, regardless of the weather outside, where you can feel as safe and comfortable as possible, and its direct dependence on quality protection of structures outside. Emphasis is placed on the fact that reliable protection of structures is also an investment in the peace of mind of the building owner and the confidence that the structures will not require repair in a short period of time. Whatever new forms of buildings and structures are invented today by developers, high-quality and modern insulation is an integral part of modern and comfortable housing, a part that should not be neglected and first of all perform all work qualitatively and pay special attention to joints of sheets of insulation material, to have as little chance as possible of external influences on warming which action can reduce service life not only of a design of warming, but also of the building as a whole.

scholarly journals Multicriteria Analysis of Selected Building Thermal Insulation Solutions

2016 ◽  
Vol 62 (3) ◽  
pp. 137-148 ◽  
Author(s):  
P. Nowak ◽  
M. Skłodkowski
Keyword(s):  
Decision Making ◽  
Thermal Insulation ◽  
Optimal Solution ◽  
Multicriteria Analysis ◽  
Entropy Method ◽  
Science Literature ◽  
Construction Sector ◽  
Decision Making Problem ◽  
Selection Of

Abstract The purpose of this paper is to present and analyse the decision-making problem faced by a future house owner - selection of the optimal solution of building thermal insulation in relation to the selected criteria, both related to costs and future benefits. The problem of selecting the best solutions in the construction sector is widely discussed in the science literature. In this paper, the authors decided to solve the raised problem by using the Entropy method.

scholarly journals Expert assessment method in foresight studies

2019 ◽  
Vol 16 (4) ◽  
pp. 4-13
Author(s):  
O. I. Karasev ◽  
E. I. Mukanina
Keyword(s):  
Delphi Method ◽  
Research Work ◽  
Assessment Method ◽  
Theoretical Research ◽  
Expert Assessment ◽  
Advantages And Disadvantages ◽  
Expert Model ◽  
Expert Assessments ◽  
Necessary And Sufficient ◽  
Selection Of

Purpose of the study. The main goal of this research is to identify key aspects of expert assessments and offer high-quality recommendations for their improvement.Materials and methods. Foresight is built on the basis of expert assessment method, includes: active formation of the image of the future instead of its probabilistic prediction, focus on identifying key development priorities, participation in the study of key stakeholders, the relationship with the management decision-making process. The methods of analysis used in the work suggest methods of theoretical research in the form of analysis and modeling. In the course of the research, the following tasks were solved: firstly, the Expert model was formed based on the necessary and sufficient criteria for selecting respondents to the foresight study; secondly, the main characteristics of the Delphi method for consensus decisions in expert groups were identified. The research work considers various sources of information, which became the basis for the further development of the Expert model, based on an integrated approach based on the statistical, sociological and economic fields of science.Results. On the basis of bibliometric analysis, important criteria for the selection of experts were highlighted: a practical component, a theoretical component, a creative component, an assessment of belonging to a field of study, an assessment of work in a study, an adjustment of results. The relevance of the selection of an expert greatly influences the result of the foresight, therefore, there is a need for a balanced selection of respondents to the study. Foresight studies have a distinctive feature from other areas in that the result is the achievement of consensus between experts in the subject area. Decision makers are drawn from three areas of activity business, government, science. In this regard, criteria for the selection of respondents were formed, which imply the necessary and sufficient conditions. The necessary criteria are understood as such parameters, without which the characteristics of the expert do not allow the respondent to be an expert for this study. A sufficient condition for the participation of the decision maker in the foresight analysis implies such selection criteria, which are complementary characteristics of the expert, which do not need to prove that the expert is a suitable expert for a specific study. As a result, four necessary criteria for the selection of experts for groups were identified, as well as individual sufficient criteria for each group. The process of carrying out the Delphi method is considered, the advantages and disadvantages are determined, on the basis of which the resulting indicator is proposed the foresight research reliability index.Conclusion. The method of selection of experts allows a comprehensive approach to the problem in the field of formation of expert groups based on the introduction of digital technologies that improves the qualitative characteristics of foresight research. The confidence index, as a result indicator, determines the objectivity of the study based on expert assessments.

scholarly journals Selection of Effective Thermal Insulation Materials for a Liquefied Natural Gas Tanks

2021 ◽  
Vol 2096 (1) ◽  
pp. 012049
Author(s):  
O N Medvedeva ◽  
S D Perevalov
Keyword(s):  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Operating Conditions ◽  
Insulation Material ◽  
Optimal Thickness ◽  
Natural Gases ◽  
Insulation Materials ◽  
Technological Facility ◽  
Cryogenic Tanks ◽  
Selection Of

Abstract The object of the research is an isothermal tank container for storage and transportation of liquefied natural gases, which requires special operating conditions and is related to a technological facility of increased danger. The purpose of the study is to substantiate the type and thickness of the insulating material to reduce the losses of liquefied natural gas during storage and transportation. Based on the results of the analysis, effective insulation materials were selected for use in cryogenic tanks for isothermal storage of LNG, the optimal thickness of the insulation material was determined, which provides the required level of losses for gas evaporation.

The Influence of the Properties of Thermal - Insulation Materials on the Thermomoist Indicators of a Building

2022 ◽  
Vol 906 ◽  
pp. 125-133
Author(s):  
Artashes Levoni Petrosyan
Keyword(s):  
Thermal Insulation ◽  
Residential Buildings ◽  
Building Construction ◽  
Insulation Material ◽  
Optimal Thickness ◽  
Electricity Prices ◽  
Water Condensation ◽  
Thermal Insulator ◽  
Significant Difference ◽  
Under Construction

One of the basic measures of energy efficiency in residential buildings is the reduction of heat and coolant pressure, when external structures - walls, ceilings - contain thermal insulation material, as a result of which heat and cold losses are reduced, as a result of air-and moisture permeability. Their number is largely determined by the climatic zone of the building, construction, sources of heat and cold, fuel and electricity prices in this region. In such practice, first of all, attention is paid to the problems of the optimal thickness of the thermal insulator, the installation location, since improper installation in the structure can cause water condensation, which will lead to partial wear of the structure, since the properties of reinforced-concrete layers will deteriorate. This concerns the peculiarities of carrying out thermal insulation works and their necessity both in under construction and in buildings in use. However, even in these conditions, when discussing the thermal effect of thermal insulation on structures, due attention is not paid to individual structures, especially walls, moisture problems. Consideration of insulators with more or less efficient energy and heat engineering characteristics, when it was found that there is a significant difference between their results and effects, aroused particular interest in the study of the problem. This is followed by a study of the influence of the presence of thermal insulation in the structure on the cold load required for cooling, revealed a pattern of cost changes in the case of insulating materials with more or less properties - foam.

Study of Permanent Thermal Insulation for Arch Dam in Cold Region

2013 ◽  
Vol 444-445 ◽  
pp. 1140-1144
Author(s):  
Zhi Qiang Xie ◽  
Jian Hua Cui ◽  
Qin Chen ◽  
Yong Feng Qi ◽  
Yong Huang
Keyword(s):  
Thermal Insulation ◽  
Small Volume ◽  
Atmospheric Temperature ◽  
Arch Dam ◽  
Insulation Material ◽  
Cold Region ◽  
Construction Period ◽  
Average Value ◽  
External Insulation ◽  
Selection Of

For virtue of small volume and fast speed of construction, arch dam is the most suitable dam type in cold region, where construction period is relatively short each year. Low average value and large amplitude of atmospheric temperature make temperature stress distribution of arch affect directly by thickness of permanent insulation material as while as the time of thermal insulation. Extreme climate lead to stricter external insulation requirement for cold region arch than these in common district, however, thermal insulation will increase the burden of artificial cooling and extend the construction period. Therefore, it is complicated and critical for arch dam crack prevention to study on permanent thermal insulation. In view of this, finite element method was applied for simulation of construction processes of a practical project in cold region. Influence of permanent thermal insulation layer thickness and selection of insulation time is analyzed, in order to provide basis for permanent thermal insulation optimization.

Review of Latest Developments in Microporous Aerogel for Building Applications

2011 ◽  
Vol 71-78 ◽  
pp. 1967-1970 ◽  
Author(s):  
Yan Qi Cui ◽  
Saffa Riffat
Keyword(s):  
Thermal Comfort ◽  
Thermal Insulation ◽  
Energy Cost ◽  
Air Conditioning ◽  
Climatic Conditions ◽  
Insulation Material ◽  
The Novel ◽  
Thermal Insulation Material ◽  
Insulation Materials ◽  
Selection Of

Buildings are large consumers of energy in all countries. In regions with harsh climatic conditions, a substantial share of energy goes to heat and cool buildings. This heating and air-conditioning lost can be reduced through many means, such as the selection of the building thermal insulation materials. The proper use of thermal insulation material in buildings does not only contribute in reducing the annual energy cost but also helps in extending the periods of thermal comfort without reliance on mechanical heating and air-conditioning. Aerogel is one of the novel insulation these years, thermal conductivities of 0.04 W/mK less can be achieved using it. The paper is concerned with a review of Microporous Aerogel for building applications. And it also provides information about their performance.

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