Vacuum Insulation Panel: Evaluation of Declared Thermal Conductivity Value and Implications for Building Energy

Fred Edmond Boafo, Jin-Hee Kim, Jong-Gwon Ahn, Sang-Myung Kim and Jun-Tae Kim ()
Additional contact information
Fred Edmond Boafo: Green Energy Technology Research Center, Kongju National University, Cheonan 31080, Republic of Korea
Jin-Hee Kim: Green Energy Technology Research Center, Kongju National University, Cheonan 31080, Republic of Korea
Jong-Gwon Ahn: Green Energy Technology Research Center, Kongju National University, Cheonan 31080, Republic of Korea
Sang-Myung Kim: Zero Energy Buildings Laboratory, Graduate School of Energy Systems Engineering, Kongju National University, Cheonan 31080, Republic of Korea
Jun-Tae Kim: Department of Green Smart Architectural Engineering, Kongju National University, Cheonan 31080, Republic of Korea

Energies, 2023, vol. 16, issue 15, 1-15

Abstract: Policymakers regularly implement stricter building energy-efficiency codes towards curtailing building energy use. Inevitably, super-insulating materials such as Vacuum Insulation Panels (VIPs) are essential to satisfy such codes. VIPs have been applied to buildings for over two decades now, with many lessons learned. Generally, the thermal conductivity values of VIPs often reported in the literature are the center-of-panel thermal conductivity ( λ cop ) and effective thermal conductivity ( λ eff ), factoring thermal bridges. However, there are other indexes, such as λ 90/90 (declared value in the 90% percentile with a confidence of 90%) and λ cop,90/90,aged (factoring aging), that increase consistently and reliably in the declared thermal conductivity value for VIPs. These indexes are scarcely computed and hardly reported. The main aim of this study was to examine the different declared thermal conductivity values of VIP-based guidelines, such as draft ISO DIS 16478, and evaluate their implications on annual building energy consumption. The main study constitutes four parts: (1) experimental evaluation of the thermal properties of pristine and aged VIP samples, (2) computation of thermal conductivity indexes, (3) numerical investigation of thermal conductivity indexes based on a reference building, and (4) related building energy implications. The mean λ cop for 10 VIP samples was 0.0042 W/(mK) and increased to 0.0073 W/(mK) for λ 90 / 90 , bridge, aged. Results show a significant bearing on building energy performance of as much as 2.1 GJ.

Keywords: vacuum insulation panel (VIP); thermal conductivity; building energy; experimental evaluation; numerical modeling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/15/5841/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/15/5841/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:15:p:5841-:d:1212150

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().