Thermal Conductivity Testing Shows Significant Benefits in Composite PCMs
C-Therm Technologies' TCi Thermal Conductivity Analyzer proves Composite PCMs best
Testing done by the Building Environment & Materials Lab at the Soongsil University School of Architecture in Seoul, Republic of Korea has determined that composite PCMs (phase change materials) loaded with xGnP (exfoliated graphite nanoplatelets) can be considered as energy saving building materials for a residential building using a radiant floor heating system. Among other testing, C-Therm’s TCi Thermal Conductivity Analyzer was utilized to determine the conductivity performance of composite PCMs as compared to pure PCMs.
The TCi Thermal Conductivity Analyzer used in this work offers users the ability to rapidly measure the thermal conductivity of materials in a variety of formats, including solid, liquid, powder, and paste. The TCi employs Modified Transient Plane Source (MTPS) method. As displayed in the above graph, xGnP loading in PCMs linearly increases thermal conductivity, which should improve the heat transfer in building materials. Testing also discovered that while the thermal conductivity was increased, the latent heat of PCMs only slightly decreased with xGnP loading. These results confirm the recommendation of utilizing composite PCMs in residential radiant floor heating systems, as an increase in heat transfer with a minimal reduction of thermal heat storage and recovery (latent heat) properties will enable a more efficient system.
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Source: High thermal performance composite PCMs loading xGnP for application to building using radiant floor heating system. Jisoo Jeon, Su-Gwang Jeong, Jeong-Hun Lee, Jungki Seo, Sumin Kim. Building Environment & Materials Lab, School of Architecture, Soongsil University, Seoul 156--‐743, Republic of Korea.