Blown Cellulose Fiber Thermal Insulations: Part 1—Density of Cellulose Fiber Thermal Insulation in Horizontal Applications

2009 ◽  
pp. 82-82-22 ◽  
Author(s):  
M Bomberg ◽  
CJ Shirtliffe
Keyword(s):  
Thermal Insulation ◽  
Cellulose Fiber ◽  
Thermal Insulations ◽  
Fiber Thermal Insulation

Fiber thermal-insulation refractories

Refractories ◽  
1993 ◽  
Vol 34 (5-6) ◽  
pp. 283-286
Author(s):  
L. A. Dergaputskaya
Keyword(s):  
Thermal Insulation ◽  
Fiber Thermal Insulation

Applicability Analysis of Selected Methods of Determining the Moisture Content of Highly Porous Thermal Insulations

2016 ◽  
Vol 824 ◽  
pp. 3-10
Author(s):  
Lubor Kalousek ◽  
Roman Brzoň ◽  
Zuzana Fišarová
Keyword(s):  
Thermal Insulation ◽  
Building Materials ◽  
New Materials ◽  
Experimental Assessment ◽  
Measuring Devices ◽  
Internal Side ◽  
Building Practice ◽  
Thermal Insulations ◽  
Highly Porous ◽  
Interior Side

Spray foam thermal insulations are one of new materials, which are now considerably applied in building practice and which are therefore also the aim of current research. In building practice is an effort to apply these materials to very rugged surfaces in both the external and the internal side of the structure. On the interior side, however, the application is connected with the risk of condensation, which is difficult to verify by the measurement. The contribution is focused just on the comparison of methods and measuring devices designed for immediate detection of moisture in the material of sprayed polyurethane foam. The samples of thermal insulation, which have undergone exposing of humidity in accordance with Czech Standards, were compared by the experimental assessment. The obtained results were compared and evaluated, while as expected, the moisture measuring of highly porous thermal insulation is significantly more difficult than the measuring of thermal insulations made of conventional homogeneous building materials.

scholarly journals Risk of Using Capillary Active Interior Insulation in a Cold Climate

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6890
Author(s):  
David Antolinc ◽  
Katarina Černe ◽  
Zvonko Jagličić
Keyword(s):  
Thermal Insulation ◽  
Freezing Temperature ◽  
Cold Climate ◽  
Moisture Profile ◽  
Central Eastern Europe ◽  
Water Condensation ◽  
Steady State Model ◽  
Heritage Buildings ◽  
Thermal Insulations ◽  
Continental Climate

The retrofitting of cultural heritage buildings for energy efficiency often requires the internal thermal insulation of external walls. Most of the in situ studies of capillary active interior insulation were performed in mild oceanic climate regions, and they showed an excellent performance. However, as a large part of Central–Eastern Europe belongs to a continental climate with cold winters and long periods of temperatures below the freezing temperature, the applicability of the capillary active interior insulation in cold climate was studied. The hydrothermal behaviour of the three walls was determined—each consists of one of three different interior insulations—and the original wall is made of historic regular solid bricks. Two interior thermal insulations were capillary active (aerated cellular concrete, calcium silicate) and one vapour-tight (glass foam). A hot box–cold box experiment and a steady-state model were used to demonstrate an increase in the original wall mass due to the water condensation only when the capillary active interior insulation is used. The combination of the water condensation and the low sub-zero temperature may lead to a risk of freeze–thaw damage to the original wall. The numerical simulation of the water vapour condensation for the considered walls for the Slovenian town Bled with sub-zero average winter temperatures was performed to obtain the whole temperature and moisture profile. It showed good agreement between an experimentally and numerically obtained amount of water condensation. The capillary active interior insulation proved to be unsuitable for improving the thermal insulation of buildings in cold continental climate, and only a vapour-tight system can be recommended.

scholarly journals Transient Thermal Analysis in an Intermittent Ceramic Kiln with Thermal Insulation: A Theoretical Approach

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Ricardo S. Gomez ◽  
Túlio R. N. Porto ◽  
Hortência L. F. Magalhães ◽  
Clotildes A. L. Guedes ◽  
Elisiane S. Lima ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Surface Temperature ◽  
Thermal Insulation ◽  
External Surface ◽  
Energy Gain ◽  
Ceramic Fiber ◽  
Microsoft Excel ◽  
Insulating Material ◽  
Transient Thermal ◽  
Thermal Insulations

Increasing the thermal efficiency of drying and firing processes of ceramic products plays an important role for industries that want to remain competitive in the market. Thus, this work aims to evaluate the influence of the type and thickness of thermal insulations, applied on the external sidewalls of an intermittent ceramic kiln, on heat transfer, temperature distribution in the insulating material, maximum external surface temperature, and energy gain, compared to the kiln without thermal insulation. All proposed mathematical formulations are based on the energy conservation, and mathematical procedures are implemented in Microsoft Excel software. Here, it was tested four types of thermal isolators: fiberglass, rockwool, calcium silicate, and ceramic fiber. Results indicate that the greater the thickness of the thermal insulation, the lower the maximum external surface temperature and the greater the energy gain when compared to the kiln without thermal insulation. In addition, fiberglass is the insulating material, among the four types analyzed, which provides greater energy gain and greater reduction in maximum external surface temperature.

scholarly journals Hygrothermal modelling of masonry blocks filled with thermal insulation

2018 ◽  
Vol 163 ◽  
pp. 08006 ◽  
Author(s):  
Balázs Nagy
Keyword(s):  
Thermal Conductivity ◽  
Polyurethane Foam ◽  
Thermal Insulation ◽  
Energy Performance ◽  
Mineral Wool ◽  
Filling Material ◽  
Physical Simulations ◽  
Heat And Moisture Transport ◽  
Heat And Moisture ◽  
Thermal Insulations

Ceramic brick as building material has been used for thousands of years. Nowadays, the energy performance of new products has to meet rigorous requirements; therefore, in the design of new ceramic masonry blocks, building physical simulations are essential. The aim of this research is to evaluate existing masonry block shapes filled with different thermal insulation using conjugated heat and moisture transport finite element simulations with material properties measured in laboratory. The research compared four different internal structures: trapezoidal, triangular, rectangular, and with mixed shaped gaps according to existing masonry blocks. In the gaps, different thermal insulations were considered, such as mineral wool, expanded perlite and polyurethane foam. The research demonstrated that the perlite as filling material does not have a great effect on thermal conductivity comparing to unfilled blocks; however, polyurethane foam with an optimal internal structure can improve the thermal performance. Manufacturing inaccuracies in the materials’ hygrothermal properties influences their performance, since a little difference in thermal conductivity has a noticeable impact on thermal transmittance, and it may result in underperformance according to regulations.

The Effect of Cellulose Fibers on the Formation of Petroleum-Based and Bio-Based Polyurethane Foams

2019 ◽  
Vol 803 ◽  
pp. 371-376
Author(s):  
Lady Jaharah Y. Jabber ◽  
Jessalyn C. Grumo ◽  
Arnold C. Alguno ◽  
Arnold A. Lubguban ◽  
Rey Y. Capangpangan
Keyword(s):  
Thermal Stability ◽  
Cellulose Fiber ◽  
Cellulose Fibers ◽  
Polyurethane Foams ◽  
Ananas Comosus ◽  
Scanning Electron Micrographs ◽  
Cell Structures ◽  
Higher Temperature ◽  
The Fourier Transform ◽  
Thermal Insulations

We report on the effect of cellulose fibers on the formation of petroleum-based and bio-based polyurethane foams. The fabricated polyurethane foams (PUF) were done by reacting isocyanate with petroleum-based polyol and epoxidized soybean oil (ESBO)-based polyols via hand mixing. The addition of cellulose fibers extracted from pineapple (Ananas comosus) leaf was done to enhance the properties of the fabricated PUF. Experimental results revealed that surface morphology of the fabricated polyurethane foams with addition of cellulose fibers remain the well-defined cell structures as shown in the scanning electron micrographs although few cell ruptures were observed. Likewise, the presence of the vibrational modes of the NCO and OH were confirmed in the Fourier transform infrared (FTIR) spectra suggesting that successful formation of polyurethane foams takes place. The thermogravimetric results revealed that much higher thermal stability for the 100% ESBO-based PUF with cellulose fibers due to the presence of cellulose and triglycerides in the ESBO-based polyols which both degrades at higher temperature. This suggest that 100% ESBO-based PUF with cellulose fiber exhibit higher thermal stability provides promising application for thermal insulations.

Sign in / Sign up

Export Citation Format

Share Document