Thermophysical investigations of nanotechnological insulation materials

Lakatos, Ákos

doi:10.1063/1.4994479

Cited by 9 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this way, after applying the linear and point heat transfer coefficients, the imposed R' values, respectively U' values, are met. A significant increase in the unidirectional thermal resistance value can be reached by thicker thermal insulation or by using super insulating materials, i.e., vacuum insulation panels and aerogel insulation [45][46][47], preponderantly recommended for LSF buildings.…”

Section: Modelled Casesmentioning

confidence: 99%

Thermo-Energy Performance of Lightweight Steel Framed Constructions: A Case Study

et al. 2022

View full text Add to dashboard Cite

The building sector continues to play an essential role in reducing worldwide energy consumption. The reduced consumption is accompanied by stricter regulation for the thermotechnical design of the building envelope. The redefined nearly Zero Energy Building levels that will come into force for each member state will pressure designers to rethink the constructive details so that mandatory levels can be reached, without increasing the construction costs over an optimum level but at the same time reducing greenhouse gas emissions. The paper aims to illustrate the main conclusions obtained in assessing the thermo-energy performance of a steel-framed building representing a holistically designed modular laboratory located in a moderate continental temperate climate, characteristic of the south-eastern part of the Pannonian Depression with some sub-Mediterranean influences. An extensive numerical simulation of the main junctions was performed. The thermal performance was established in terms of the main parameters, the adjusted thermal resistances and global thermal insulation coefficient. Further on, the energy consumption for heating was established, and the associated energy rating was in compliance with the Romanian regulations. A parametric study was done to illustrate the energy performance of the investigated case in the five representative climatic zones from Romania. An important conclusion of the research indicates that an emphasis must be placed on the thermotechnical design of Light Steel Framed solutions against increased thermal bridge areas caused by the steel’s high thermal conductivity for all building components to reach nZEB levels. Nevertheless, the results indicate an exemplary behaviour compared to classical solutions, but at the same time, the need for an iterative redesign so that all thermo-energy performance indicators are achieved.

show abstract

Section: Modelled Casesmentioning

confidence: 99%

Thermo-Energy Performance of Lightweight Steel Framed Constructions: A Case Study

et al. 2022

View full text Add to dashboard Cite

show abstract

“…It has also been found that thermal insulation capacity of nano-ceramic thermocoatings is affected by its thermal inertia (thermal lag). During the review of heat transfer processes, a further discovery has been made that the physical equations used for atomic diffusion can be applied to heat diffusion (Lakatos, 2017).…”

Section: Literature Summarymentioning

confidence: 99%

Thermodynamic Processes in Nanostructured Thermocoatings

Bozsaky¹

2020

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings

View full text Add to dashboard Cite

In the 21st century, global climate change and the high level of fossil energy consumption have introduced changes affecting all sectors of the economy, including the building industry. This process has prompted EU members to create strict regulations in building energetics. It has become a serious task for architects to find more effective ways for thermal insulation. One of these options is the application of nanostructured materials. Among them nano-ceramic thermocoatings open a wide range of research fields, because complete agreement had not been already found about their insulating effect. In order to explore and describe the thermodynamic process inside nano-ceramic thermocoatings 6 series of heat transfer resistance experiments were performed in 2014-2018. Several building structure configurations with 12 different orders of layers were tested with a standard heat flow meter. On basis of these results it could be concluded that in case of nano-structured thermocoatings convective heat transfer coefficient might be taken account in different way than in case of traditional macro-structured thermal insulation materials. Based on research results, the limits of its applicability can also be concluded. It has also been found that the insulating effect of nanostructured thermocoatings depends on the material characteristics of the insulated surface.

show abstract

“…Due to the strict sustainability standards, the building industry has worked on new concepts for reducing the consumption of petrochemicals and carbon emission over the last decades . In addition to the application of wood, palm, wool, and cellulose fibers as a natural source in the building insulation, new systems with optimized energy consumption have been developed . Vacuum insulation panels (VIPs) and aerogels have been proven to be among the best thermal insulation solutions due to their extremely low thermal conductivity .…”

Section: Introductionmentioning

confidence: 99%

“…cellulose fibers as a natural source in the building insulation, new systems with optimized energy consumption have been developed. [5][6][7][8] Vacuum insulation panels (VIPs) and aerogels have been proven to be among the best thermal insulation solutions due to their extremely low thermal conductivity. 9,10 However, both materials are very costly and have some restrictions in building insulation applications.…”

mentioning

confidence: 99%

Polystyrene nanofibers for nonwoven porous building insulation materials

Datsyuk

Trotsenko

Peikert³

et al. 2019

Engineering Reports

View full text Add to dashboard Cite

The building industry makes a great effort to reduce energy consumption. The use of nanotechnology is one of the approaches to surpassing the properties of conventional insulation materials. In this work, an industrial cost‐effective method to manufacture highly porous materials with excellent thermal insulation properties is described. The materials are prepared from polystyrene recovered from the building sector and electrospun as nanofiber‐based sheets. Varying electrospinning parameters allow controlling the morphology of the produced materials. The materials are obtained with differences in interfiber and inner‐fiber porosity and morphology. The thermal conductivity of the freestanding and compressed materials is evaluated. Those differences affect the insulation performance: the materials with higher interfiber porosity show better thermal insulation in the freestanding state. An increase of the inner‐fiber porosity leads to better insulation in the compressed samples. Insertion of carbon nanomaterials reduces the effects of the infrared Radiation. Nanofiber‐based insulation materials from the recycled expanded polystyrene (EPS) show thermal conductivity values of 20 to 25 mW/mK (ie, 20% to 30% below the thermal conductivity of the commercial EPS). The effect of integrating polystyrene nanofiber sheets into conventional wall‐building materials is also investigated in terms of thermal insulation. The nanofiber insulation sheets are sandwiched between two pieces of the building materials resulting in a drastic increase of the insulation effect. The materials have a great potential in using, for example, as thermal insulation for the restoration of historic buildings in the narrow central parts of the old towns.

show abstract

Thermophysical investigations of nanotechnological insulation materials

Cited by 9 publications

References 15 publications

Thermo-Energy Performance of Lightweight Steel Framed Constructions: A Case Study

Thermo-Energy Performance of Lightweight Steel Framed Constructions: A Case Study

Thermodynamic Processes in Nanostructured Thermocoatings

Polystyrene nanofibers for nonwoven porous building insulation materials

Contact Info

Product

Resources

About