FACADES MADE OF G40 SYSTEM BEFORE AND AFTER THERMAL INSULATION

2019 ◽  
Author(s):  
Anna Marie Cerna
Keyword(s):  
Thermal Insulation ◽  
Before And After

The Heating Energy Consumption Analysis and Energy Saving Transformation for the New Rural Apartment

2015 ◽  
Vol 744-746 ◽  
pp. 2318-2323
Author(s):  
Xiao Rui Liu ◽  
Shu Hui Xu ◽  
Yang Guo ◽  
Qing Ru Hao
Keyword(s):  
Energy Consumption ◽  
Comparative Analysis ◽  
Energy Saving ◽  
Thermal Insulation ◽  
North China ◽  
Present Situation ◽  
Energy Consumption Analysis ◽  
Before And After ◽  
Heating Energy Consumption

The main purpose of this test is to analysis heating energy consumption in new rural apartments in north china. At the first, we analysis the present situation of energy consumption and feature for new apartment in north china, then we proposed the measures to improve the performance of energy saving thermal insulation in new apartment in the area of north china, we conducted comparative analysis for energy consumption in new apartment before and after energy saving.

scholarly journals Analysis of the possibilities for improvement of thermal comfort of living quarters located in multi-family large-panel prefabricated buildings

2018 ◽  
Vol 44 ◽  
pp. 00145
Author(s):  
Konrad Podawca ◽  
Agata Pawłat-Zawrzykraj ◽  
Marek Dohojda
Keyword(s):  
Twentieth Century ◽  
Real Estate ◽  
Thermal Comfort ◽  
Thermal Insulation ◽  
Air Temperature ◽  
Optimal Temperature ◽  
Large Panel ◽  
Before And After ◽  
Optimal Temperature Range ◽  
Family Building

The article discusses the issue of low thermal insulation of partitions in large-panel prefabricated buildings. They were constructed mainly in the 70's and the 80's of the twentieth century. Defects related to freezing as well as vertical and horizontal joints of prefabricated walls, began to appear as early as in the very first years of operation. It was very burdensome for flat users due to lack of thermal comfort, mycological problems and rising heating costs. The thermovision analysis covered sections of panel partitions in real estate at Lazurowa Street in Warsaw, which is a four-storey multi-family building, constructed in large-panel system. The measurements were carried out in the periods of January-February 2016 before the thermal modernization of the building, and in January 2018 after its modernization and renovation of the flat. Before-and-after comparison of thermal insulation state was made on the basis of surface temperatures of crucial spots. Furthermore, after changes in the structure of external walls were finished, thermal comfort or discomfort in the analysed room were visualised, using graphs of the optimal temperature range of walls, ceiling and floor, depending on the air temperature in the room.

Research on Improvement of Thermal Insulation and Anti-Radiation Performances of Traditional Wooden Vernacular Dwellings of Tujia Minority in West Hunan

2014 ◽  
Vol 633-634 ◽  
pp. 936-940
Author(s):  
Li Zhe ◽  
Shi Lei
Keyword(s):  
Thermal Resistance ◽  
Thermal Insulation ◽  
Thermal Environment ◽  
Air Cavity ◽  
Before And After ◽  
Practical Engineering ◽  
Wall Construction ◽  
Technological Improvements

On the premise of protecting traditional styles of the dwellings, performances of thermal insulation and anti-radiation performances of traditional wooden dwellings of Tujia Minority in West Hunan and the interior thermal environment were improved through technological improvements in this paper. By improving wall construction technologies, thermal insulation boards and wooden planks were added to exterior walls of these dwellings. Furthermore, a two-layer air cavity formed and thus greatly improved thermal resistance of walls. Meanwhile, feasibility of improvement technologies proposed in this paper was validated by practical engineering tests and data detected before and after tests

Termorenowacja stolarki okiennej

BUILDER ◽  
2019 ◽  
Vol 261 (4) ◽  
pp. 118-122
Author(s):  
Romana Antczak - Jarząbska ◽  
Maciej Niedostakiewicz
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Thermal Insulation ◽  
The State ◽  
Before And After ◽  
The Heat Transfer Coefficient

The paper presents the results of preliminary calculations of the heat transfer coefficient for historic windows made for the state before and after their renovation. The aim of the analysis was to obtain the values of thermal insulation parameters demanded by the regulations, while not losing the historical value of the window. The described example of the thermo-renovation concept of the existing window consisted in installing an additional window panel from the inside.

scholarly journals How High-Loft Textile Thermal Insulation Properties Depend on Compressibility

2020 ◽  
Vol 20 (3) ◽  
pp. 338-343 ◽  
Author(s):  
Viera Glombikova ◽  
Petra Komarkova ◽  
Eva Hercikova ◽  
Antonin Havelka
Keyword(s):  
Thermal Resistance ◽  
Thermal Insulation ◽  
Compression Test ◽  
Compressive Loading ◽  
Poor Correlation ◽  
Compression Properties ◽  
Before And After ◽  
Thermal Insulations ◽  
Met Expectations

AbstractThis paper investigates the performance of high-loft thermal insulations in terms of their compression properties, recovery behavior and thermal resistance. The aforementioned properties belong to the basic producer requirements for winter functional sportswear, sleeping bags or blankets. Majority of thermal insulation producers declare high quality of their products claiming durability and insulation within beginning of their application. But, it is important to uncover how dynamic compressive loading (which simulates real condition of using) influences heat transport of tested filling for the whole lifetime period. Therefore, two groups of top synthetic thermal insulation materials were tested before and after compression loading. Subsequently, relaxation behavior of samples was determined by thickness recovery after the compression test. Furthermore, thermal resistance was measured before and after the compression test to find out the change in thermal effectivity of samples. In summary, these results have not met expectations and show a rather poor correlation between the rate of compression after dynamic loading and the drop of thermal resistance of tested fillings.

scholarly journals Insulation of historic buildings and case study simulation

2021 ◽  
Vol 1209 (1) ◽  
pp. 012003
Author(s):  
K Hutkai ◽  
D Katunský
Keyword(s):  
Moisture Content ◽  
Surface Temperature ◽  
Thermal Insulation ◽  
Cultural Value ◽  
Historic Buildings ◽  
Insulating Materials ◽  
Physical Character ◽  
External Insulation ◽  
Before And After

Abstract The article deals with the historic buildings and their insulation. It is generally known that classical thermal insulation of walls from the outside is not permissible due to the cultural value of historic facades. Compared to external insulation solutions, the implementation of internal insulation is more technically complex and faces several risks. In the article is devoted the chapter which deals with the aim of the application of internal insulation in historic buildings. There are mentioned risks associated with the application of internal insulation, which are related to the thermal-humidity behaviour of the structure. One chapter is devoted to faults that may occur after the application of internal insulation. These disorders have a building-physical character and also affect the hygienic criteria of the building. The larger chapter deals with insulating materials suitable for the purposes of interior insulation of historic buildings. The results of a case study from Dublin and Košice are also presented, where the thermal-humidity behaviour of selected thermal insulation materials was investigated. The results of moisture content and surface temperature before and after application of insulating materials are compared.

scholarly journals Preparation and Properties of Novel Superhydrophobic Cellulose Nanofiber Aerogels

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Guoqing Liu ◽  
Jing Li ◽  
Xiaodong Li ◽  
Xiangjun Pan ◽  
Chao Qian
Keyword(s):  
Thermal Insulation ◽  
Raw Materials ◽  
Sol Gel ◽  
Cellulose Nanofibers ◽  
Three Dimensional ◽  
Volume Ratio ◽  
Laser Flash ◽  
Cellulose Nanofiber ◽  
Water Contact ◽  
Before And After

The superhydrophobic cellulose nanofiber aerogels were prepared via sol-gel and subsequent freeze-drying with cellulose nanofibers as raw materials and perfluorohexyl ethyl trimethoxysilane and 3-aminopropyl trimethoxysilane as modifying monomers. The effect of volume ratio and total dosage of the two modifying monomers on the superhydrophobic properties was investigated, and the property variations of the cellulose nanofibers before and after modification were also characterized by FT-IR, XRD, TGA, SEM, XPS, and laser flash diffusivity apparatus. The results showed that the modifying monomers were successfully grafted onto cellulose nanofibers, and the prepared modified cellulose nanofiber aerogels had higher thermal stability. After modification, a micron-level arrayed three-dimensional grid superhydrophobic surface structure was constructed, and the surface energy was reduced. The prepared aerogels exhibited superhydrophobicity with a water contact angle up to 151° and excellent thermal insulation performance with a thermal conductivity of 0.035 W·m−1·K−1, which displayed promising application potential in the field of thermal insulation and waterproof materials.

Effect of latex powder and glass fibers on the performance of glazed hollow bead thermal insulation materials

2015 ◽  
Vol 22 (3) ◽  
pp. 279-286 ◽  
Author(s):  
Xiaolong Li ◽  
Guozhong Li
Keyword(s):  
Mechanical Properties ◽  
Thermal Insulation ◽  
Water Resistance ◽  
Glass Fibers ◽  
Fracture Morphology ◽  
Insulation Material ◽  
Acrylic Emulsion ◽  
Insulation Materials ◽  
Before And After ◽  
Resistance Performance

AbstractGlazed hollow bead, cement, fly ash, and latex powder were used to prepare a glazed hollow bead thermal insulation material by way of compression molding, and the effects of redispersible latex powder on the mechanical properties and water resistance performance of the material were studied. In addition, the action mechanism of latex powder was analyzed. The surface of alkali-resistant glass fibers was treated by styrene-acrylic emulsion, and the effects of glass fibers on the mechanical properties of glazed hollow bead thermal insulation materials before and after treatment were studied, respectively. Moreover, the fracture morphology of the samples was observed and analyzed to explore the reinforced mechanism of fiber. The results show that when the dosage of latex powder is 4%, compared with blank samples, the sample’s flexural and compressive strengths increase by 48% and 20.83%, respectively, and the 2-h and 24-h water absorption of the samples is reduced by 71.37% and 66.94%, respectively. When the dosage of surface-treated fibers is 1.0%, the flexural strength of the samples increases by 35.71% and the compressive strength of the samples increases by 8.34% compared with samples that were mixed with untreated fibers.

Evaluation and Measured Analysis by FTIR of Fiber Insulation Materials Used in Inflatable Mini Cold Storage

2014 ◽  
Vol 997 ◽  
pp. 346-349
Author(s):  
Jiu Chun Han ◽  
Xi Hong Li ◽  
Yan Wu
Keyword(s):  
Polylactic Acid ◽  
Thermal Insulation ◽  
Polyester Fiber ◽  
Bamboo Fiber ◽  
Corn Fiber ◽  
Insulation Materials ◽  
Before And After ◽  
Key Factor ◽  
Materials Used ◽  
Heat Preservation

Thermal insulation performance is a key factor in evaluation of thermal insulation materials. The chemical structure of polyester fiber, bamboo fiber and polylactic acid fiber was analyzed, and thermal insulation properties of the samples were investigated in terms of the measured transmittance of IR with before and after treated. The results showed that the measured transmittance of IR of corn fiber was lower than polyester fiber and bamboo fiber. In addition, the measured transmittance of bamboo fiber changed obviously, polyester fiber had small changes, polylactic acid fiber almost had no change. Moreover, the measured transmittance had an increasing trend. The heat preservation performance decreased after the samples were treated.

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