Cem ÖMÜR, Osman Furkan MURATOĞLU, İLHAMİ HORUZ

Methodology and Realization of a Heat Pipe Performance Test in a Thermal Vacuum Chamber

In this study, a newly developed test set-up installed in a thermal vacuum chamber and the thermal performance test conducted with this set-up is described. Evaporator is simulated by using mounted resistive heaters on it whereas two black painted aluminum plates in contact with the condenser are used to remove heat from heat pipe. Thanks to the vacuum level obtained in the chamber, the convection heat transfer is eliminated; so, the heat loss from heat pipe can be neglected while calculating the maximum heat transport capacity of the heat pipe. When the proposed test methodology is applied and the measured test parameters are used, maximum heat transport capacity and effective thermal conductivity of a heat pipe can be calculated with uncertainties of % 2 and % 6.4, respectively. Therefore, the proposed test set-up and test methodology is demonstrated to be an efficient tool for the determination of heat pipe thermal parameters.

Bir Isıl Vakum Odasında Isı Borusu Performans Testi Gerçekleştirilmesi ve Testin Metodolojisi

Bu çalışmada, ısıl vakum odasına konumlandırılmış, ısı borusunun ısıl performans testine yönelik yeni geliştirilmiş bir test düzeneği ve bu düzenekle gerçekleştirilen ısıl performans testi üzerinde durulmuştur. Buharlaştırıcı, yüzeylerine yerleştirilen direnç telli ısıtıcılarla temsil edilirken, yoğuşturucu ise her iki yüzeyine temas halinde olan siyah boyalı alüminyum plakalar kullanılarak elde edilmiştir. Isıl vakum odasında elde edilen vakum seviyesi sayesinde taşınım ısı transferi ortamdan kaldırılmış, böylece ısı borusundan olan ısı kaçakları ihmal edilerek maksimum ısı taşıma kapasitesi hesaplanabilmiştir. Çalışmada önerilen test metodolojisi uygulanıp test verileri kullanıldığında ısı borusunun maksimum ısı taşıma kapasitesi ve etkin ısıl iletkenliği nispeten küçük belirsizliklerle bulunabilmiş, böylece önerilen test düzeneği ve yönteminin ısı borusu ısıl performans parametrelerinin elde edilebilmesinde etkin bir düzenek ve yöntem olduğu gösterilmiştir.

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