A study on the thermal conductivity of resilient materials

Jeong, Young-Sun; Choi, Hyun-Joung; Kim, Kyoung-Woo; Choi, Gyoung-Seok; Kang, Jong-Ho; Yang, Kwan-Seop

doi:10.1016/j.tca.2009.02.015

Cited by 16 publications

(13 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thermal conductivity values of foams were very similar with an average of 0.069 W m −1 K −1 , indicating that they all have similar open-closed cell proportions. Values were quite high comparing with other data reported in literature for foams obtained from both vegetable oil based polyols and petrochemical polyols (Badri, 2012;Jeong et al, 2009). This could be due to the foam disposition during the analysis, which could be slightly compressed by the temperature probe.…”

Section: Thermal Propertiessupporting

confidence: 66%

Flexible polyurethane foams based on 100% renewably sourced polyols

Ugarte¹,

Saralegi

Fernández³

et al. 2014

Industrial Crops and Products

View full text Add to dashboard Cite

Since polyol is one of the major components in polyurethane foam synthesis, introducing renewably sourced polyols in the foam formulation leads to materials with high renewable carbon content. A series of flexible polyurethane foams with variations in polyol composition were synthesized with castor oil based Lupranol Balance ® 50 polyether polyol and corn based polytrimethylene ether glycol mixtures. Water was used as the unique and eco-friendly blowing agent. The effect of the relative amount of each polyol on the structure and properties was analyzed by optical microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, tensile and compressive tests, dynamic mechanical analysis and atomic force microscopy. The average molecular weight and hydroxyl number of the polyol components showed to influence the foaming reaction and hence the structure and properties of the polyurethane foam. The newly developed peak force quantitative nano-mechanics technique was used to map the elastic modulus values of foam cell struts and it seemed to be adequate to assess the purity of the different phases.

show abstract

Section: Thermal Propertiessupporting

confidence: 66%

Flexible polyurethane foams based on 100% renewably sourced polyols

Ugarte¹,

Saralegi

Fernández³

et al. 2014

Industrial Crops and Products

View full text Add to dashboard Cite

show abstract

“…The experiment results showed the correlation expression between the thermal conductivity and the density, which allowed the determination of the adequate insulation materials and their thermal conductivity for a building energy code. When insulation materials are installed in the walls, floors, and roofs of a building to prevent heat loss and to reduce noise in buildings, materials must be used in consideration of not only the physical properties of the materials, but also their thermal properties [6]. The study showed that the conductivity of the resilient materials in reinforced concrete floor structure with radiant floor heating system affected the energy saving.…”

Section: Discussionmentioning

confidence: 99%

“…There was a correlation between the dynamic stiffness and the heavyweight impact sound. Jeong et al [6] have measured the thermal conductivity and density of the resilient materials and examined the correlation of these. But there has been no study that tried to analyze the heat transfer RC floor structure with radiant floor heating system as thermal property of resilient materials.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Analysis of Reinforced Concrete Floor Structure with Radiant Floor Heating System in Apartment Housing

Jeong

Jung

2015

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

The use of the resilient materials in the radiant floor heating systems of reinforced concrete floor in apartment housing is closely related to the reduction of the floor impact sound and the heating energy loss. This study examined the thermal conductivity of expanded polystyrene (EPS) foam used for the resilient material in South Korea and analysed the thermal transfer of reinforced concrete floor structure according to the thermal conductivity of the resilient materials. 82 EPS specimens were used to measure the thermal conductivity. The measured apparent density of EPS resilient materials ranged between 9.5 and 63.0 kg/m3, and the thermal conductivity ranged between 0.030 and 0.046 W/(m·K). As the density of resilient materials made of expanded polystyrene foam increases, the thermal conductivity tends to proportionately decrease. To set up reasonable thermal insulation requirements for radiant heating floor systems, the thermal properties of floor structure according to thermal insulation materials must be determined. Heat transfer simulations were performed to analyze the surface temperature, heat loss, and heat flow of floor structure with radiant heating system. As the thermal conductivity of EPS resilient material increased 1.6 times, the heat loss was of 3.4% increase.

show abstract

“…To measure the thermal conductivity, KS 9016 [13,14] and ISO 8301 [15] were applied for this study. The instrument (HFM 436 Lambda Series, NETZSCH) was used for measuring the thermal conductivity of the test specimens with the heat flow meter method (HFM).…”

Section: Thermal Propertymentioning

confidence: 99%

Experimental Study on the Comparison of the Material Properties of Glass Wool Used as Building Materials

Kim

Jeong

2014

Self Cite

View full text Add to dashboard Cite

Artificial mineral fibers such as glass wool or stone wool are commonly used in building walls, ceilings and floors as a major insulation material for buildings. Among the material properties of building materials, thermal conductivity, the sound absorption coefficient, compressibility, and dynamic stiffness are regarded as important performance requirements since they directly affect the thermal and acoustic properties of the building. This study measured the changes of the thermal and acoustical performances of glass wool that was actually installed for a long time to the outer wall of a building as an insulation material through a comparison with recently produced glass wool. The results showed that the measured thermal conductivities of the old and the new specimens both rise with an increase of temperature, showing quite similar results in both specimens over temperature ranges of (0 -20) ºC. The noise reduction coefficient decreased by 0.1 in the old specimen and the difference of the compressibilities in both specimens was shown to be 7.32 mm. The dynamic stiffness of the old specimen was found to be 1.28 MN/m 3 higher than that of the new specimen.

show abstract

A study on the thermal conductivity of resilient materials

Cited by 16 publications

References 1 publication

Flexible polyurethane foams based on 100% renewably sourced polyols

Flexible polyurethane foams based on 100% renewably sourced polyols

Thermal Performance Analysis of Reinforced Concrete Floor Structure with Radiant Floor Heating System in Apartment Housing

Experimental Study on the Comparison of the Material Properties of Glass Wool Used as Building Materials

Contact Info

Product

Resources

About