Thermal Performance Degradation of Vacuum Insulation Panels under Vacuum Loss Conditions

Borys Basok; Andrii Danishevskyi; Hanna Koshlak; Svitlana Goncharuk; Oleksii Shmatok; Anna Wypych-Gawronska

doi:10.2478/rtuect-2026-0030

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Thermal Performance Degradation of Vacuum Insulation Panels under Vacuum Loss Conditions

Environmental and Climate Technologies

Volume 30 (2026): Issue 1 (January 2026)

By: Borys Basok , Andrii Danishevskyi , Hanna Koshlak , Svitlana Goncharuk , Oleksii Shmatok and Anna Wypych-Gawronska

Open Access

|Sep 2026

Abstract

This paper presents an experimental study of thermal performance degradation of vacuum insulation panels under vacuum loss conditions. The experiments were carried out under field conditions using heat flux and temperature measurements. Two configurations were investigated: a single intact vacuum insulation panel and a sandwich system consisting of two vacuum insulation panels separated by an air layer after destructive damage. The effective thermal conductivity was determined under quasi-steady-state conditions. The results showed that the effective thermal conductivity of the intact vacuum insulation panel was in the range of 0.0094–0.0105 W/(m·K), which is higher than the nominal value of approximately 0.008 W/(m·K). After vacuum loss, the effective thermal conductivity increased to 0.030–0.035 W/(m·K), approaching the level of conventional thermal insulation materials. This confirms that vacuum loss causes a stepwise degradation of the thermal insulation properties of vacuum insulation panels.

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Articles in this issue

DOI: https://doi.org/10.2478/rtuect-2026-0030 | Journal eISSN: 2255-8837 (formerly 2255-8845) | Journal ISSN: 1691-5208

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Language: English

Page range: 445 - 453

Submitted on: May 27, 2026

Accepted on: Jul 1, 2026

Published on: Sep 20, 2026

Published by: Riga Technical University

In partnership with: Paradigm Publishing Services

Publication frequency: Volume open

Keywords:

thermal conductivity,

thermal resistance,

vacuum insulation panel,

vacuum loss

Related subjects:

Life sciences,

Life sciences, other

© 2026 Borys Basok, Andrii Danishevskyi, Hanna Koshlak, Svitlana Goncharuk, Oleksii Shmatok, Anna Wypych-Gawronska, published by Riga Technical University
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 30 (2026): Issue 1 (January 2026)