Determination of thermal contact resistance in thermo-vacuum chamber experiments

Determination of thermal contact resistance in thermo-vacuum chamber experiments

Paper in proceedings (conference paper)

Thermal contact resistance (TCR) caused by surface imperfections results in a reduced heat transfer rate on the interface of two solids in contact. The exact prediction of these resistances may enhance the accuracy of the thermal conductance measurements in a thermo-vacuum chamber. Such an enhancement is crucial for the development and performance testing of the Miniaturized Heat Switch – a passive thermal management unit for satellites or robotic missions. This study presents an experimental investigation of low contact-pressure TCR within thermo-vacuum chamber measurement. We will use a custom-built experimental setup to measure the steady-state temperature difference across the calibration specimen and chamber interface while varying the applied heat load. The results quantify the effect of low contact pressure TCR within the experiments and provide insights into the design of heat transfer interfaces. This knowledge may be also applied in heat switch technology that relies on efficient heat transfer.

Thermal contact resistance (TCR) caused by surface imperfections results in a reduced heat transfer rate on the interface of two solids in contact. The exact prediction of these resistances may enhance the accuracy of the thermal conductance measurements in a thermo-vacuum chamber. Such an enhancement is crucial for the development and performance testing of the Miniaturized Heat Switch – a passive thermal management unit for satellites or robotic missions. This study presents an experimental investigation of low contact-pressure TCR within thermo-vacuum chamber measurement. We will use a custom-built experimental setup to measure the steady-state temperature difference across the calibration specimen and chamber interface while varying the applied heat load. The results quantify the effect of low contact pressure TCR within the experiments and provide insights into the design of heat transfer interfaces. This knowledge may be also applied in heat switch technology that relies on efficient heat transfer.

thermo-vacuum chamber, thermal contact resistance, experimental, steady-state

thermo-vacuum chamber, thermal contact resistance, experimental, steady-state

LAZAR, V.; MAŠEK, J.; POPELA, R.; JEBÁČEK, I.

2025

06.10.2023

International Astronautical Federation

Baku, Azerbaijan

Proceedings of the International Astronautical Congress, IAC

0074-1795

Proceedings of the International Astronautical Congress, IAC

2023

unknown

5

https://www.scopus.com/record/display.uri?eid=2-s2.0-85187988272&origin=resultslist&sort=plf-f&src=s&sid=d0793b63fb226882f45b4ea4527a3c69&sot=b&sdt=cl&cluster=scosubjabbr%2C%22ENGI%22%2Ct&s=FIRSTAUTH%28lazar%29&sl=20&sessionSearchId=d0793b63fb226882f45b4ea4527a3c69&relpos=9

IAC_23-Determination of thermal contact resistance in thermo-vacuum chamber experiments_LAZAR