Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Makine Mühendisliği, Türkiye
Tezin Onay Tarihi: 2022
Tezin Dili: Türkçe
Öğrenci: BURAK BODUR
Danışman: Abuzer Özsunar
Özet:
In recent years, electronic equipment that is consuming much power is developed. Rising power in electronic equipment leads to revealing high heat loads that need to be removed from the equipment. Especially issues that concentrate on a small area and cause hot spots reveal a big problem for the equipment. One of the solutions is vapor chamber systems. Vapor chamber systems provide high thermal conductivity with phase change material. Because of using phase change material lining two axes, vapor chamber is called heat spreader device. There are many academic studies about vapor chamber performance by comparing traditional high conductivity materials like copper and aluminum. Many studies with vapor chamber are conducted on electronic devices under gravity force and atmospheric condition. Convection and radiation heat transfer modes are used in order to spread and remove heat from these systems. However, dominant heat transfer mode in these systems is convection. In this study, vapor chamber performance is thermally analyzed only for space systems where heat can be passively removed by radiation. With the ANSYS ICEPACK package program, the heat produced by star tracker equipment on a satellite in geostationary orbit is examined and the situation of removing this heat emitted from the star tracker by the vapor chamber system is analyzed. Because of space vacuum conditions, radiating heat transfer mode is the only way to remove the heat from star tracker. Analysis results show that star tracker temperature can remain in between working temperatures with proper heat sink design. Moreover, vapor chamber provides higher heat conductivity in both axes than usual material like copper in space environment. Heat sink is more efficient with vapor chamber because of presenting more isothermal surface than copper ones.
Key Words : Vacuum, radiation, conductivity, heat