scholarly journals Selection of insulation-sewing materials for rooms of class «R» floating restaurant by the method of multi- criteria comparison of alternative options

2020 ◽  
pp. 103-108
Author(s):  
Anastasia A. Stepanova ◽  
Tatyana A. Mikheeva
Keyword(s):  
Comparison Method ◽  
Optimal Choice ◽  
Quality Level ◽  
Insulation Material ◽  
Interior Decoration ◽  
Insulating Materials ◽  
Insulation Materials ◽  
Technological Level ◽  
Selection Of

This article proposes and considers a method for solving the problem of the optimal choice of insulation and sewing materials for the interior of a floating class «P» restaurant. This method is based on the principle of multi-criteria comparison of alternative options [1]. For comparison, most suitable insulation materials for a vessel of this type were selected. Since in modern shipbuilding safety and comfort demands of the interior of the vessels are high, so the requirements for insulation materials on the interior are also high. Various characteristics of insulating and sewing materials, which determine their quality level, were analyzed in details. When studying the characteristics of insulating materials, the technological level and competitiveness of the manufacturer were taken into account. To determine the most suitable insulation material for the interior decoration of the floating restaurant, multi-criteria comparison method was first applied. The determination of the materials competitiveness was made.

scholarly journals SELECTION OF THE INSULATION MATERIALS FOR REFURBISHMENT PURPOSES

2017 ◽  
Vol 9 (2) ◽  
pp. 104-115 ◽  
Author(s):  
Irene LILL ◽  
Loreta KANAPECKIENE ◽  
Laura TUPENAITE ◽  
Jurga NAIMAVICIENE
Keyword(s):  
Material Selection ◽  
Residential Buildings ◽  
Assessment Method ◽  
Diffusion Resistance ◽  
Insulation Material ◽  
Insulation Materials ◽  
Increase Energy Efficiency ◽  
Water Vapour Diffusion ◽  
Building Facades ◽  
Selection Of

Refurbishment of the building facades of residential buildings, including insulation, is often considered as the most energy efficient renovation measure with the largest potential. One of the solutions to increase energy efficiency is the selection of the appropriate insulation materials of the external walls. The article proposes the approach for selection of the insulation material based on SAW multiple criteria assessment method. The proposed methodology is applied for the case of insulation material selection in refurbishment of 12-storey building in Vilnius, Lithuania. Research reveals that rock wool outperforms other materials by thermal conductivity, light weigh, water vapour diffusion resistance, highest flammability class, durability and lowest emission of CO2 and is an efficient insulation to be used for sustainable refurbishment solutions.

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.

Evaluation of Structure Influence on Thermal Conductivity of Thermal Insulating Materials from Renewable Resources

1970 ◽  
Vol 17 (2) ◽  
pp. 208-212 ◽  
Author(s):  
Jolanta VĖJELIENĖ ◽  
Albinas GAILIUS ◽  
Sigitas VĖJELIS ◽  
Saulius VAITKUS ◽  
Giedrius BALČIŪNAS
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Renewable Resources ◽  
Raw Materials ◽  
Raw Material ◽  
Barley Straw ◽  
Insulation Material ◽  
Insulating Materials ◽  
Insulation Materials ◽  
Thermal Insulating

The development of new thermal insulation materials needs to evaluate properties and structure of raw material, technological factors that make influence on the thermal conductivity of material. One of the most promising raw materials for production of insulation material is straw. The use of natural fibres in insulation is closely linked to the ecological building sector, where selection of materials is based on factors including recyclable, renewable raw materials and low resource production techniques In current work results of research on structure and thermal conductivity of renewable resources for production thermal insulating materials are presented. Due to the high abundance of renewable resources and a good its structure as raw material for thermal insulation materials barley straw, reeds, cattails and bent grass stalks are used. Macro- and micro structure analysis of these substances is performed. Straw bales of these materials are used for determining thermal conductivity. It was found that the macrostructure has the greatest effect on thermal conductivity of materials. Thermal conductivity of material is determined by the formation of a bale due to the large amount of pores among the stalks of the plant, inside the stalk and inside the stalk wall.http://dx.doi.org/10.5755/j01.ms.17.2.494

scholarly journals Development of a Novel Integrated CCSD-ITARA-MARCOS Decision-Making Approach for Stackers Selection in a Logistics System

Mathematics ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1672 ◽  
Author(s):  
Alptekin Ulutaş ◽  
Darjan Karabasevic ◽  
Gabrijela Popovic ◽  
Dragisa Stanujkic ◽  
Phong Thanh Nguyen ◽  
...  
Keyword(s):  
Decision Making ◽  
Multiple Criteria Decision Making ◽  
Integrated Approach ◽  
Optimal Choice ◽  
Illustrative Case ◽  
Logistics System ◽  
Illustrative Case Study ◽  
Logistics Activity ◽  
Selection Of

The main goal of this paper is to propose a Multiple-Criteria Decision-Making (MCDM) approach that will facilitate decision-making in the field of logistics—i.e., in the selection of the optimal equipment for performing a logistics activity. For defining the objective weights of the criteria, the correlation coefficient and the standard deviation (CCSD method) are applied. Furthermore, for determining the semi-objective weights of the considered criteria, the indifference threshold-based attribute ratio analysis method (ITARA) is used. In this way, by combining these two methods, the weights of the criteria are determined with a higher degree of reliability. For the final ranking of the alternatives, the measurement of alternatives and ranking according to the compromise solution method (MARCOS) is utilized. For demonstrating the applicability of the proposed approach, an illustrative case study pointing to the selection of the best manual stacker for a small warehouse is performed. The final results are compared with the ones obtained using the other proved MCDM methods that confirmed the reliability and stability of the proposed approach. The proposed integrated approach shows itself as a suitable technique for applying in the process of logistics equipment selection, because it defines the most influential criteria and the optimal choice with regard to all of them in a relatively easy and comprehensive way. Additionally, conceiving the determination of the criteria with the combination of objective and semi-objective methods enables defining the objective weights concerning the attitudes of the involved decision-makers, which finally leads to more reliable results.

scholarly journals Determination of Optimal Flat-End Head Geometries for Pressure Vessels Based on Numerical and Experimental Approaches

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2520
Author(s):  
Paweł J. Romanowicz ◽  
Bogdan Szybiński
Keyword(s):  
High Pressures ◽  
Experimental Tests ◽  
Pressure Vessels ◽  
Optimal Choice ◽  
Residual Welding ◽  
Experimental Approaches ◽  
Relief Groove ◽  
Strain Gauge Measurements ◽  
Selection Of

The experimental and numerical analyses of the pressure vessels with different flat ends are presented and discussed in the paper. The main aim of the study is to propose the optimal flat head end geometry. The analyses are focused on the comparison of standardized geometries and with the proposed elliptical cut-out. The experimental tests with the application of strain-gauge measurements and numerical modeling of the pressure vessel are conducted. The behavior under low and high pressures and the influence of the residual welding stresses, material properties, and geometrical tolerances on the level of the plastic deformation in the flat end is discussed. It is presented that the rules given in the recent standard are not sufficient for optimal selection of the optimal geometry. It is observed that in certain geometries the deviations of the pipe thickness may lead to a significant increase of the equivalent stresses. The residual welding stresses have a significant influence on the stress and strain level—particularly in the stress relief groove (SRG). The performed study and comparison of the different geometries allow for the proposal of the optimal shape of the flat end. It appeared that the pressure vessels with SRG are the most optimal choice, particularly when elliptic shapes are in use. In some cases (i.e., pipe with wall-thickness equal to 40 mm and the flat end with circular SRG), the optimal configuration is reached for dimensions beyond the admissible by code range.

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.

scholarly journals Analysis Of Aspects Of Messages Hiding In Text Environments

2015 ◽  
Vol 34 (1) ◽  
pp. 5-16
Author(s):  
Olesya Afanasyeva
Keyword(s):  
Electronic Communication ◽  
Semantic Analysis ◽  
Quality Level ◽  
Quantitative Level ◽  
Text Fragment ◽  
Semantic Value ◽  
Level Analysis ◽  
Semantic Parameters ◽  
Selection Of

Abstract In the work are researched problems, which arise during hiding of messages in text environments, being transmitted by electronic communication channels and the Internet. The analysis of selection of places in text environment (TE), which can be replaced by word from the message is performed. Selection and replacement of words in the text environment is implemented basing on semantic analysis of text fragment, consisting of the inserted word, and its environment in TE. For implementation of such analysis is used concept of semantic parameters of words coordination and semantic value of separate word. Are used well-known methods of determination of values of these parameters. This allows moving from quality level to quantitative level analysis of text fragments semantics during their modification by word substitution. Invisibility of embedded messages is ensured by providing preset values of the semantic cooperation parameter deviations.

scholarly journals DEVELOPMENT OF A METHODOLOGY FOR ASSESSING THE MANUFACTURABILITY OF INDUSTRIAL PRODUCTS IN THE CONDITIONS OF PILOT PRODUCTION

2021 ◽  
Vol 31 (4) ◽  
pp. 597-602
Author(s):  
D.M. Malikova
Keyword(s):  
Product Design ◽  
Quantitative Assessment ◽  
Practical Significance ◽  
Technological Performance ◽  
Expert Selection ◽  
Technological Level ◽  
Optimal Set ◽  
Selection Of ◽  
Integral Indicator

The article is devoted to improving the reliability of a comprehensive quantitative assessment of the technological performance of the product design in the conditions of pilot production, taking into account the specific production and technological conditions of the enterprise by solving the problem of objective selection of technological performance indicators. To achieve this goal, the following tasks were solved: the indicators of the manufacturability of product designs, their quantitative assessment were studied; a mathematical model for the formation of design indicators of manufacturability was developed, the optimal set of indicators of manufacturability for a particular product was selected; a method for quantitative evaluation and expert selection of indicators of manufacturability by their weights was developed; an algorithm for determining the integral indicator of the product's manufacturability was developed; the developed algorithm for the integral evaluation of the product's manufacturability indicators was applied. The practical significance of the work lies in the approbation of the author's method of expert selection and the determination of the integral index of manufacturability. This indicator is one of the elements of improving the efficiency of the enterprise, especially in the conditions of pilot production. The method developed by the author makes it possible to more reliably assess the manufacturability of the product at the initial stages of design. A positive result was obtained by expert selection of indicators that take into account the design features and the technological level of the manufacturer. In addition, the proposed method made it possible to identify reserves for improving the manufacturability of the product design. The use of the author's methodology helps to reduce the time and costs associated with the development and production of a new product.

scholarly journals Heat radiation effects on insulating materials used in buildings

2021 ◽  
Author(s):  
Flóra Hajdu ◽  
Gabriella Lászlo ◽  
Rajmund Kuti
Keyword(s):  
Thermal Insulation ◽  
Laboratory Tests ◽  
Radiation Effects ◽  
Expanded Polystyrene ◽  
Heat Radiation ◽  
Insulation Material ◽  
Insulating Materials ◽  
Insulation Materials ◽  
Materials Used ◽  
Construction Permit

AbstractIn recent years, in order to increase the energy efficiency of older buildings in Hungary, several tenders have supported the modernization of the thermal insulation. Various thermal insulation materials have been installed on walls, on slab and on floor. Unfortunately there are cases where thermal insulation materials are not installed in accordance with the construction permit or the manufacturer’s instructions, which poses a serious danger in case of a fire. During the research the effects of heat on the behavior of Expanded PolyStyrene, a thermal insulation material often used in Hungary is examined. Laboratory tests and computer simulations were carried out, which are presented in detail in this paper. The aim of the research is to contribute to increase the fire safety of buildings.

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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