The Role of Polyurethane Chemistry on the Properties of Phenolic Foams Applied in the Thermal Insulation Industry

2022 ◽  
pp. 331-357
Author(s):  
Chiacchiarelli Leonel Matías
Keyword(s):  
Thermal Insulation

scholarly journals Cool Roof Impact on Building Energy Need: The Role of Thermal Insulation with Varying Climate Conditions

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3354 ◽  
Author(s):  
Piselli ◽  
Pisello ◽  
Saffari ◽  
Gracia ◽  
Cotana ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Thermal Energy ◽  
Building Energy ◽  
Energy Performance ◽  
Cold Climate ◽  
Climate Conditions ◽  
Building Energy Performance ◽  
Cool Roof ◽  
Solar Reflectance

Cool roof effectiveness in improving building thermal-energy performance is affected by different variables. In particular, roof insulation level and climate conditions are key parameters influencing cool roofs benefits and whole building energy performance. This work aims at assessing the role of cool roof in the optimum roof configuration, i.e., combination of solar reflectance capability and thermal insulation level, in terms of building energy performance in different climate conditions worldwide. To this aim, coupled dynamic thermal-energy simulation and optimization analysis is carried out. In detail, multi-dimensional optimization of combined building roof thermal insulation and solar reflectance is developed to minimize building annual energy consumption for heating–cooling. Results highlight how a high reflectance roof minimizes annual energy need for a small standard office building in the majority of considered climates. Moreover, building energy performance is more sensitive to roof solar reflectance than thermal insulation level, except for the coldest conditions. Therefore, for the selected building, the optimum roof typology presents high solar reflectance capability (0.8) and no/low insulation level (0.00–0.03 m), except for extremely hot or cold climate zones. Accordingly, this research shows how the classic approach of super-insulated buildings should be reframed for the office case toward truly environmentally friendly buildings.

scholarly journals Influence of building orientation on internal temperature in saharan climates, building located in Ghardaïa region (Algeria)

2013 ◽  
Vol 17 (2) ◽  
pp. 349-364 ◽  
Author(s):  
Sidi Bekkouche ◽  
Tayeb Benouaz ◽  
Mohamed Cherier ◽  
Maamar Hamdani ◽  
Mohamed Yaiche ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Thermal Insulation ◽  
Air Temperature ◽  
Thermal Inertia ◽  
Numerical Data ◽  
Internal Temperature ◽  
And Control ◽  
The Mathematical Model ◽  
Do So

In desert regions, the orientation of buildings has an important influence in the inside air temperature. In the present work, we carry out a study on the influence of the buildings orientation as well as the thermal insulation on the internal temperature. To do so, we have considered the case where only the exposed walls are isolated. The main objective of the current work is to determine the temperatures of the building in question with and without thermal insulation. This study aims at assessing also the geographic parameter enhancing or damping the role of thermal inertia, providing a variety of results. As result, this work proves that stones play a contradictory role on thermal comfort. We have verified that thermal insulation is specified to reduce heat transfer through the building. Concerning the orientation, results indicates that the variation in orientation does not influence significantly the internal air temperature of a well thermally insulated building. Moreover, in hot period, whatever orientation considered, the phenomenon of overheating presents a serious problem to minimize consumption of energy and control of indoor temperature in case of building without insulation. The numerical data was compared to the experimental measurements in order to validate the mathematical model. In conclusion, to achieve a better thermal comfort arid and semi arid regions, the habitation will have to be situated in south flan of a hill to satisfy the two strategies (hot and cold).

Building External Wall Thermal Insulation Construction Quality Safety Measures Analysis

2012 ◽  
Vol 253-255 ◽  
pp. 646-649
Author(s):  
Xin Hua Zhang ◽  
Jian Xin Liu ◽  
Hong Zhuan Zhang
Keyword(s):  
Thermal Insulation ◽  
Material Selection ◽  
Building Energy ◽  
Insulation Material ◽  
Safety Measures ◽  
External Wall ◽  
Building Energy Saving ◽  
Wall Construction ◽  
Paper Insulation

The external wall thermal insulation technology in building energy saving is widely used in engineering, but in general it faces some quality security problems, this paper insulation material selection, exterior insulation system and its safety, fire redundancy and external wall construction corresponding measures on the analysis. So as to the engineering quality safety problems have prevention in the role of the external wall thermal insulation technology obtain the considerable development.

scholarly journals Thermal and Acoustic Insulating Gypsum Composite Material with Improved Water Resistance

2020 ◽  
Vol 14 (2) ◽  
pp. 89-93
Author(s):  
Volodimir Kersh ◽  
Andriy Kolesnikov ◽  
Mikola Hlitsov ◽  
Sergіi Gedulyan
Keyword(s):  
Composite Material ◽  
Thermal Insulation ◽  
High Resistance ◽  
Water Resistance ◽  
Resistance Index ◽  
Sound Insulation ◽  
Material Strength ◽  
Building Heat ◽  
Softening Coefficient

The article discusses methods for obtaining building heat and sound insulating composite material based on gypsum with high resistance to water. An additional characteristic is considered - the water resistance index, in which the role of material strength in the wet state is enhanced. The proposed characteristic is used to optimize the heat and sound insulating composition based on gypsum. The material contains matrix gypsum-cement-ash binder and a mixture of aggregates. The result of the planned experiment shows that the water resistance index more adequately reflects the strength of the composite in the wet state compared to the softening coefficient. An optimization of the complex properties of the composite is given in accordance with its intended purpose. As a result of the study, an optimal waterproof composition with improved thermal insulation and sound insulation characteristics was obtained.

Role of thermal insulation in passive designs of buildings

1988 ◽  
Vol 5 (3) ◽  
pp. 303-313 ◽  
Author(s):  
A. Anani ◽  
Z. Jibril
Keyword(s):  
Thermal Insulation

The Role of Thermal Insulation in the Architecture of Hot Desert Climates

2019 ◽  
pp. 433-444
Author(s):  
Carlos López-Ordóñez ◽  
Isabel Crespo Cabillo ◽  
Jaume Roset Calzada ◽  
Helena Coch Roura
Keyword(s):  
Thermal Insulation

scholarly journals Reduction of Heat Losses Using Quadruple Heating Pre-Insulated Networks: A Case Study

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4699
Author(s):  
Tomasz Janusz Teleszewski ◽  
Dorota Anna Krawczyk ◽  
Antonio Rodero
Keyword(s):  
Heat Loss ◽  
Thermal Insulation ◽  
Heat Losses ◽  
Hot Water ◽  
Conductive Heat ◽  
Domestic Hot Water ◽  
Steel Pipes ◽  
Heating Pipes

The paper presents an analysis of heat loss and reductions of annual emissions of air pollutants of a quadruple pre-insulated heating network by comparing this solution with the existing pre-insulated network consisting of four pre-insulated single pipes and the variant consisting of two twin pipe pre-insulated. For calculations, an existing heating network located in central Poland was adopted, where heat is transported for heating purposes of buildings and domestic hot water with circulation of domestic hot water through four separate pre-insulated underground pipes. The idea of the construction of four pre-insulated pipes presented in the paper consists in the location of four steel pipes in a common round thermal insulation, which perform the role of heat transport for heating purposes in multi-family buildings (supply and return) and two pipes transporting hot water (a pipe with domestic hot water with circulation). In Poland, heating pipes used in multi-family housing have a larger diameter compared to domestic hot water pipes, which is why standard twin pipe heating pipes have been used in the construction of four pre-insulated networks, in which the domestic hot water pipe has been added to the thermal insulation and circulation of domestic hot water. In order to determine heat losses, a simplified two-dimensional model of conductive heat transfer was developed using Fortran to create a computer program. The results of numerical simulations show that the use of twin pipes for the construction of pre-insulated quadruple networks has contributed to a significant reduction in heat loss in relation to the existing single pre-insulated network (up to 57.1%), while reducing the thermal insulation field of the cross-section of the pre-insulated pipe by 21.4%.

Thermal insulation behavior of functionally graded aerogel: The role of novolac molecular-weight

Polymer ◽  
2019 ◽  
Vol 178 ◽  
pp. 121575 ◽  
Author(s):  
Mina Noroozi ◽  
Mahyar Panahi-Sarmad ◽  
Ahmad Reza Bahramian
Keyword(s):  
Molecular Weight ◽  
Thermal Insulation ◽  
Functionally Graded
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