scholarly journals Models for the choice of the most favorable contractor for construction of the thermal insulation systems

2003 ◽  
Vol 2 (5) ◽  
pp. 339-348
Author(s):  
Milorad Zlatanovic ◽  
Dima Trajkovic
Keyword(s):  
Mathematical Models ◽  
Thermal Insulation ◽  
Optimal Solution ◽  
Insulation System ◽  
Insulation Systems

The paper considers the multi-criterion models of the choice of the most favorable contractor for construction of the thermal insulation system at the previously constructed buildings. The paper is a contribution to the consideration of the most favorable contractor, as it is one of the very important decisions of the investor. A large number of variant solutions is proposed. Firstly, the criteria for the choice of the most favorable contractor of these works are formed. Then, a methodology for the choice of the contractor for the construction of the facade thermal insulation system is presented, that is the mathematical models for the solution of such problem are presented, with a purpose to determine the optimal solution that is, make a choice of the most favorable contractor of these works.

scholarly journals The Analysis of Small Investors’ Demands on a Thermal Insulation System for a Family House: A Case Study

2021 ◽  
Vol 13 (5) ◽  
pp. 2491
Author(s):  
Alena Tažiková ◽  
Zuzana Struková ◽  
Mária Kozlovská
Keyword(s):  
Decision Making ◽  
Thermal Insulation ◽  
Construction Cost ◽  
Environmental Cost ◽  
Multi Criteria Decision Making ◽  
Insulation System ◽  
Insulation Systems ◽  
Small Investors ◽  
The Cost ◽  
Family House

This study deals with small investors’ demands on thermal insulation systems when choosing the most suitable solution for a family house. By 2050, seventy percent of current buildings, including residential buildings, are still expected to be in operation. To reach carbon neutrality, it is necessary to reduce operational energy consumption and thus reduce the related cost of building operations and the cost of the life cycle of buildings. One solution is to adapt envelopes of buildings by proper insulation solutions. To choose an optimal thermal insulation system that will reduce energy consumption of building, it is necessary to consider the environmental cost of insulation materials in addition to the construction cost of the materials. The environmental cost of a material depends on the carbon footprint from the initial origin of the material. This study presents the results of a multi-criteria decision-making analysis, where five different contractors set the evaluation criteria for selection of the optimal thermal insulation system. In their decision-making, they involved the requirements of small investors. The most common requirements were selected: the construction cost, the construction time (represented by the total man-hours), the thermal conductivity coefficient, the diffusion resistance factor, and the reaction to fire. The confidences of the criteria were then determined with the help of the pairwise comparison method. This was followed by multi-criteria decision-making using the method of index coefficients, also known as the method of basic variant. The multi-criteria decision-making included thermal insulation systems based on polystyrene, mineral wool, thermal insulation plaster, and aerogels’ nanotechnology. As a result, it was concluded that, currently, in Slovakia, small investors emphasize the cost of material and the coefficient of thermal conductivity and they do not care as much about the carbon footprint of the material manufacturing, the importance of which is mentioned in this study.

Development of Out-Wall External Thermal Insulation System Based on Rock-Wool

2012 ◽  
Vol 174-177 ◽  
pp. 1589-1592
Author(s):  
Ming Gang Xu ◽  
Xu Wang ◽  
Zhuo Wei Ding
Keyword(s):  
Thermal Insulation ◽  
Thermal Conductivity Coefficient ◽  
Outer Wall ◽  
Sound Insulation ◽  
Insulation System ◽  
Stable Chemical ◽  
Insulation Systems ◽  
Saving Measure ◽  
Insulation Performance ◽  
Rock Wool

The outer-wall thermal insulation system has been wide used in civil engineering as an effective energy-saving measure. At present, the organic flammable thermal insulation materials such as EPS and XPS are used in outer-wall thermal insulation system in China, which leads to great fire damage probably. The rock-wool is described in detail on its merits such as good thermal insulation performance, good sound insulation performance, light weight, low thermal conductivity coefficient, incombustibility, innocuity and stable chemical capability. Two popular outer-wall external thermal insulation systems are introduced. The construction sequence of the outer-wall external thermal insulation system with rock-wool slabs, mortar and thin layer plastering technology is described.

scholarly journals Testing of biocidal properties of thermal insulation system during material life cycle

2021 ◽  
Vol 1205 (1) ◽  
pp. 012022
Author(s):  
I Kukletova ◽  
I Chromkova
Keyword(s):  
Thermal Insulation ◽  
Laboratory Experiments ◽  
Resistance Testing ◽  
Accelerated Ageing ◽  
Insulation System ◽  
Time Period ◽  
Biological Attack ◽  
Time Problem ◽  
Insulation Systems ◽  
Short Time

Abstract With the growing number of realized thermal insulation systems, fast growing number of buildings with facades attacked by microorganisms occurs. Such surface attack can occur even in the first years after thermal insulation completion, and it can be a serious problem in a very short time. Problem is both in realization and maintaining of thermal insulation, and directly in the used material. The paper presents results of laboratory experiments on resistance to biological attack, carried out for five commercial materials available on the Czech market. Before the experiments, materials were subjected to accelerated ageing for 4 and 10 years. Resistance testing comprises regulated application of algae and mould strains on samples and incubation in a defined environment. Materials resistant after ageing simulation of the longer time period were found as well as materials susceptible to attack already after completion of a facade set.

Analysis on Life Cycle Cost and Economic Benefits of Self-Thermal Insulation System of Three Different External Walls in Changsha in China

2011 ◽  
Vol 374-377 ◽  
pp. 1438-1441
Author(s):  
Zhen Sha ◽  
Nian Ping Li ◽  
Bai Jun Wang ◽  
Yong Yang ◽  
Zhen Hui Xiao
Keyword(s):  
Energy Saving ◽  
Thermal Insulation ◽  
Life Cycle Cost ◽  
Economic Benefits ◽  
Practical Significance ◽  
Analysis Model ◽  
Insulation System ◽  
External Wall ◽  
Insulation Systems ◽  
Present Worth

The mathematical analysis model of LCC of self-thermal insulation system of external wall that is applicable to Changsha region is established by using degree days and present worth factor. And the LCC of three commonly used self-thermal insulation systems in Changsha is analyzed by using this model. Analysis results have proven that self-thermal insulation system of external wall has very significant comprehensive economic benefits compared with the wall that energy-saving measures are not taken, and it has an important practical significance to promote the development of energy-saving building in Changsha, China．

scholarly journals Study on thermal insulation of liquefied natural gas cryogenic road tanker

2019 ◽  
Vol 23 (Suppl. 4) ◽  
pp. 1381-1391 ◽  
Author(s):  
Edward Lisowski ◽  
Filip Lisowski
Keyword(s):  
Natural Gas ◽  
Thermal Insulation ◽  
Low Cost ◽  
Liquefied Natural Gas ◽  
Insulation System ◽  
Heat Leakage ◽  
Insulation Systems ◽  
Natural Gas Transport ◽  
Cost Of Materials ◽  
Transient Thermal

The tanks designed for liquefied natural gas transport must be thermally insulated from the environment due to the low condensing temperature of the gas. The effectiveness of thermal insulation significantly affects the tank's operating parameters and its operating costs. As there is no perfect insulation, there is a need for analyses that would determine its suitability in specific applications. In this paper the issue of heat transfer through double-walled cryogenic tanks with evacuated insulation system was discussed. Afterwards the study of insulation variants of liquefied natural gas cryogenic road tanker was presented. The use of several layers of insulation made of modern and efficient materials such as aero-gel and fiberglass or the use of multi-layer isolation has been considered and compared to the use of perlite powder. The heat flux through insulation systems was tested for different variants of evacuated insulation under residual gas pressure of 10-1 Pa, 10-3 Pa, and 100 kPa. Finally, for selected insulation variants, the heat leakage was tested for 50 m3 liquefied natural gas road tanker. The investigation of heat-flow for the transient thermal analysis was performed by applying finite element method. The aim of the study was to determine the variant of insulation system with the relatively low heat leakage to the tank and low cost of materials and vacuum production.

scholarly journals Research of the structural, formal and aesthetic characteristics of the façade thermal insulation systems

2004 ◽  
Vol 3 (1) ◽  
pp. 69-77
Author(s):  
Miomir Vasov ◽  
Ivana Bogdanovic
Keyword(s):  
Thermal Insulation ◽  
Environment Protection ◽  
Project Development ◽  
Insulation System ◽  
Scientific Research Project ◽  
Science Technology ◽  
Insulation Systems ◽  
The Government ◽  
The Aesthetic ◽  
Aesthetic Characteristics

The elements of the structure of the fa?ade thermal insulation systems are exposed to various external actions and it is necessary to design and construct them in a manner which would make them resistant to the detrimental influence of the forces acting upon them. The fa?ade thermal insulation system, depending on the structure, may have various impact on the aesthetic and formal possibilities of a structure, in this way influencing the comprehensive impression of a space and its ambient value. This paper was done in the framework of the scientific-research project "Development of the fa?ade thermal insulation system" at the Faculty of Civil Engineering and Architecture of Nis, which is financed by the Ministry of Science, Technology and Environment Protection of the Government of Republic of Serbia.

scholarly journals Experimental Study of Gypsum-Concrete Dense-Column Composite Boards with External Thermal Insulation Systems

2020 ◽  
Vol 10 (6) ◽  
pp. 1976 ◽  
Author(s):  
Shaochun Ma ◽  
Peng Bao ◽  
Nan Jiang
Keyword(s):  
Seismic Performance ◽  
Thermal Insulation ◽  
Static Loading ◽  
Deformation Behavior ◽  
Insulation System ◽  
Comparison Result ◽  
Fracture Feature ◽  
Composite Board ◽  
Insulation Systems ◽  
Seismic Tests

In this paper, a new kind of gypsum-concrete dense-column thermal insulation composite board was developed, with seismic tests conducted on three specimens under quasi-static loading conditions. The fracture feature, hysteresis behavior, material strain, load-bearing and deforming capacity, and energy-dissipating capacity of the composite board were analyzed. The results indicated that this composite board has a favorable energy-dissipating capacity, i.e., relatively high seismic performance. By comparing with the experimental results of composite boards without thermal insulation systems, the influence regularity of thermal insulation system on the deformation behavior of composite board was investigated. The comparison result indicated that with a thermal insulation system, the bearing capacity and ductility of composite board are obviously increased, implying that the thermal insulation system is beneficial for the seismic performance of composite boards.

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