TY  - JOUR
AU  - Mirković-Marjanović, Milica
AU  - Kijanović, Aleksandar
AU  - Ilić, Snežana
AU  - Janković, Ksenija
AU  - Zakić, Dimitrije
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/444
AB  - The Guarded hot plate method (GHP) is a widely used technique to measure thermal conductivity of thermal insulation specimens in steady-state conditions. In this paper, an advance of GHP has been developed in the Laboratory for Thermal technique and fire protection in Institute IMS. The innovative GHP has been applied for measuring thermal conductivity using additional heat flux meters. The design of this GHP is similar to the design of the plate for GHP apparatus; however, it has different design: smaller width of thermal barrier, which is filled with insulation glue. Heaters inside hot and guard plates are built from wire for thermocouples, which is a unique type of heater. Geometry of heater has been optimized inside plates to achieve uniform temperature distribution along the specimen surface. Temperature uniformity of guarded hot plate and energy balance were experimentally determined. The verification and validation results of improved GHP have been shown. The test method was validated comparing test results of thermal conductivity with results of the round-robin test. Four national companies participated in the round-robin comparison on thermal conductivity measurement by guarded hot plate method. The measurement was performed on the same specimen of thermal insulation material (expanded polystyrene) according to SRPS EN 12667 at temperatures ranging between 10℃-40℃. The measured thermal conductivity of all participants in the round-robin test was input data for statistical processing according to SRPS ISO 5725-2 and ISO 13528. To evaluate the performance of the participants, the “z” score has been used. Measurements were conducted successively for all participants. Since 2020, the Accreditation Body of Serbia also approved this test method.
T2  - Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747
T1  - Verification and validation of an advanced guardedhot plate for determination of thermal conductivity
EP  - 4747
SP  - 4735
VL  - 26
DO  - 10.2298/TSCI220311108M
ER  - 

@article{
author = "Mirković-Marjanović, Milica and Kijanović, Aleksandar and Ilić, Snežana and Janković, Ksenija and Zakić, Dimitrije",
year = "2022",
abstract = "The Guarded hot plate method (GHP) is a widely used technique to measure thermal conductivity of thermal insulation specimens in steady-state conditions. In this paper, an advance of GHP has been developed in the Laboratory for Thermal technique and fire protection in Institute IMS. The innovative GHP has been applied for measuring thermal conductivity using additional heat flux meters. The design of this GHP is similar to the design of the plate for GHP apparatus; however, it has different design: smaller width of thermal barrier, which is filled with insulation glue. Heaters inside hot and guard plates are built from wire for thermocouples, which is a unique type of heater. Geometry of heater has been optimized inside plates to achieve uniform temperature distribution along the specimen surface. Temperature uniformity of guarded hot plate and energy balance were experimentally determined. The verification and validation results of improved GHP have been shown. The test method was validated comparing test results of thermal conductivity with results of the round-robin test. Four national companies participated in the round-robin comparison on thermal conductivity measurement by guarded hot plate method. The measurement was performed on the same specimen of thermal insulation material (expanded polystyrene) according to SRPS EN 12667 at temperatures ranging between 10℃-40℃. The measured thermal conductivity of all participants in the round-robin test was input data for statistical processing according to SRPS ISO 5725-2 and ISO 13528. To evaluate the performance of the participants, the “z” score has been used. Measurements were conducted successively for all participants. Since 2020, the Accreditation Body of Serbia also approved this test method.",
journal = "Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747",
title = "Verification and validation of an advanced guardedhot plate for determination of thermal conductivity",
pages = "4747-4735",
volume = "26",
doi = "10.2298/TSCI220311108M"
}

Mirković-Marjanović, M., Kijanović, A., Ilić, S., Janković, K.,& Zakić, D.. (2022). Verification and validation of an advanced guardedhot plate for determination of thermal conductivity. in Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747, 26, 4735-4747.
https://doi.org/10.2298/TSCI220311108M

Mirković-Marjanović M, Kijanović A, Ilić S, Janković K, Zakić D. Verification and validation of an advanced guardedhot plate for determination of thermal conductivity. in Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747. 2022;26:4735-4747.
doi:10.2298/TSCI220311108M .

Mirković-Marjanović, Milica, Kijanović, Aleksandar, Ilić, Snežana, Janković, Ksenija, Zakić, Dimitrije, "Verification and validation of an advanced guardedhot plate for determination of thermal conductivity" in Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747, 26 (2022):4735-4747,
https://doi.org/10.2298/TSCI220311108M . .