Effect of the air channels in thermal insulating material on its thermal resistance

Orlik-Kożdoń, Bożena; Steidl, Tomasz

doi:10.1177/1744259115599957

Cited by 13 publications

(8 citation statements)

References 7 publications

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“…The author of the present work focused principally on the development of a technological and material solution involving internal insulation which would compromise the needs of residents and eliminate the adverse aspects such as wood decay or the condensation of water vapor in the envelope. The research and development work on producing such a material has been carried out for two years now and the main aim is to invent a new material for thermal insulation from the inside [23,[36][37][38]. Due to specific geometry and structure, its application in historical buildings from the inside can eliminate unfavorable moisture impact in the envelope and in its nodes.…”

Section: Discussionmentioning

confidence: 99%

Interior Insulation of Masonry Walls—Selected Problems in the Design

Orlik-Kożdoń

2019

Energies

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This article addresses the important problem of improving the energy efficiency of historic buildings, where due to the architectural value of the facade, thermal insulation should be placed from the inside. As a part of this publication, the author, on the basis of their own experience and research, presents and discusses selected problems to which special attention should be paid when designing this type of insulation. These are among other things: disturbances in the distribution of the temperature field on the partition; defects related to partial thermal insulation of partitions; the lack of detailed analysis of wall systems in terms of construction and their technical condition; wood decay; the selection of inadequate calculation methods, e.g., the simple method of Fokin–Glaser and many others. The author, on the basis of measurements and computational analysis, presents the methodology of a correct solution of such problems. This significantly simplifies currently applied methods.

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Section: Discussionmentioning

confidence: 99%

Interior Insulation of Masonry Walls—Selected Problems in the Design

Orlik-Kożdoń

2019

Energies

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“…1,2 It is urgently needed to reduce heat loss and improve heat utilization efficiency in the manufacturing sector. [2][3][4] Traditional thermal insulation materials include granular expanded perlite, 5 polyethylene foam, 6 polyurethane foam, 7 ultrafine glass wool, 8 asbestos, etc. Their drawbacks include the poor machinability of particles, the huge pores of foams, and the carcinogenicity of asbestos.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the escalating costs of energy sources, such as natural gas, the global energy crisis has been worsening in recent years 1,2 . It is urgently needed to reduce heat loss and improve heat utilization efficiency in the manufacturing sector 2–4 . Traditional thermal insulation materials include granular expanded perlite, 5 polyethylene foam, 6 polyurethane foam, 7 ultrafine glass wool, 8 asbestos, etc.…”

Section: Introductionmentioning

confidence: 99%

Lightweight, robust, porous heterocyclic para‐aramid aerogel hollow fibers for multifunctional applications

Wu,

Song,

et al. 2023

J of Applied Polymer Sci

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In nature, many fibers with warmth‐retention properties, such as the hair of polar bears and rabbits, both have a hollow cross‐section structure. The static air in fiber cavities can effectively inhibit heat conduction and serve as an effective thermal insulator. In this work, the high‐performance heterocyclic para‐aramid polymer was selected as the spinning solution, and aerogel hollow fiber was prepared by coaxial wet spinning and freeze‐drying techniques. The effects of spinning solution concentration and lyophilized solvent on the micromorphology, mechanical properties, and specific surface area of heterocyclic para‐aramid aerogel hollow fiber (HPAAHF) were systematically studied. The produced HPAAHF possessed excellent mechanical properties (tensible strength ~3.85 MPa), high specific surface area (~ 260.90 m2 g−1), and lightweight advantages. The thermal conductivity of HPAAHF was only 0.0278 W m−1 K−1, indicating its excellent thermal insulation properties. The aerogel fabric exhibited outstanding flame retardancy properties, with a total heat release of only 0.7 MJ m−2 in the cone calorimetric experiment, making it a self‐extinguishing fabric. In addition, phase change material was injected into the hollow structure to obtain aerogel‐phase change material composite fibers, which exhibited great energy storage prospects. As a result, the high‐performance heterocyclic para‐aramid polymer‐based aerogel hollow fiber was successfully prepared and had multifunctional applications in thermal insulation, flame retardancy, and heat energy storage fields.

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“…The reason for this is that the requirements for building constructions and engineering structures include standards for energy efficiency, durability, and functionality. The functionality of the insulating coating of any construction is associated with the creation of controlled temperature and humidity conditions in insulated structures and internal rooms [1,2]. Depending on the purpose of a particular object, the following requests may be in the forefront: control of temperature, humidity inside the premises, air freshness and purity, etc.…”

Section: Introductionmentioning

confidence: 99%

Foam Polymers in Multifunctional Insulating Coatings

Ter-Zakaryan

Zhukov

et al. 2021

Polymers

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The application of foamed polymers as one of the components of insulating coatings allows to solve the problems of energy saving and creation of optimal operating conditions for constructions. The systems of application of energy-efficient heat-insulating materials must consider both the particularities of the insulating materials and the functional orientation of the constructions. The implementation of the concept of seamless insulating coatings implies the achievement of thermal effect and reduction in air permeability both by means of the application of thermal insulation with low thermal conductivity and the minimization of junctions between separate elements of the insulating coating, which is achieved using elastic foamed polymers and, first of all, polyethylene foam. Construction of seamless insulating coatings creates practically impermeable heat, vapor, and water barriers along the outer perimeter of the insulated object. Multilayer products based on polyethylene foam represent a relatively new material—a fact that requires examination of their properties, as well as under various operating conditions, and development of a methodology for evaluation of the operational resistance of these materials in structures of different purposes, including cold conservation. The performed tests have shown that the compressive strength at 10% deformation is determined by the function of load application area and varies from 70 kPa during the test of cube samples of 10 × 10 × 10 in size to 260 kPa for areas exceeding 100 m2. The longitudinal tensile strength amounts to 80–92 kPa, and the strength of the weld seam is equal to 29–32 kPa. It has been established that the values of thermal conductivity of polyethylene foam with an average density of 18–20 kg/m3 amounts to 0.032–0.034 W/(m·K), diffusion moisture absorption is equal to 0.44 kg/m2 without a metallized coating and 0.37 kg/m2 with a metallized coating; water absorption after partial immersion in water for 24 h amounts to 0.013 kg/m2; water absorption by volume after complete water immersion for 28 days is equal to 0.96%. The material does not practically change its properties under conditions of long-term temperature alteration from −60 to +70 °C. The developed and implemented insulation systems for protective surfaces of framed construction objects, rubbhalls and frameless structures, floating floors, indoor ice rinks, and snow conservation systems are presented.

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Effect of the air channels in thermal insulating material on its thermal resistance

Cited by 13 publications

References 7 publications

Interior Insulation of Masonry Walls—Selected Problems in the Design

Interior Insulation of Masonry Walls—Selected Problems in the Design

Lightweight, robust, porous heterocyclic para‐aramid aerogel hollow fibers for multifunctional applications

Foam Polymers in Multifunctional Insulating Coatings

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