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Journals / Mühendislik Bilimleri Dergisi / 2004 / Cilt: 10 - Sayı: 1

A parametric study of flow and heat transfer in closed thermosyphon loop

Kapalı termosifon döngüsünde akış ve ısı transferi üzerine parametrik çalışma

Tahsin BAŞARAN
MUSTAFA SERHAN KÜÇÜKA
Pages
127–135
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The dependence of this correlation on Grashof and Prandtl numbers was determined.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, closed loop rectangular thermosyphon was studied parametrically.
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Key Findings & Data:Two-dimensional numerical model was solved using uniform surface temperature boundary condition in the vertical heated and cooled sections of the thermosyphon loop.
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Conclusion & Impact:The dependence of this correlation on Grashof and Prandtl numbers was determined.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, closed loop rectangular thermosyphon was studied parametrically. Two-dimensional numerical model was solved using uniform surface temperature boundary condition in the vertical heated and cooled sections of the thermosyphon loop. In two-dimensional model, results for laminar flow case were obtained by solving the momentum and the energy equations through the SIMPLEX Algorithm. Used parameters are Prandtl numbers, Grashof numbers and H/D which is obtained from the elevation difference between the mid-point of heated and cooled sections divided by inside diameter of the thermosyphon pipe. In addition, a correlation for the Nusselt number of the thermosyphon loop was developed. The dependence of this correlation on Grashof and Prandtl numbers was determined.

Özet

Bu çalışmada, dikdörtgen formdaki kapalı döngü bir termosifon üzerine, parametrik bir çalışma gerçekleştirilmiştir. Termosifon döngünün düşeyde olan ısıtma ve soğutma bölgelerinde, sabit yüzey sıcaklığı sınır koşulu kullanılarak; iki-boyutlu sayısal çözümleme yapılmıştır. Sayısal sonuçlar, laminer akış kabulü ile ve süreklilik, momentum ve enerji denklemlerinin SIMPLEX algoritması ile çözümlenmesiyle elde edilmiştir. Kullanılan parametreler, Prandtl sayısı, Grashof sayısı ve ısıtma ile soğutma bölgelerinin orta noktaları arasındaki yükseklik farkının boru iç çapına bölünmesiyle elde edilen H/D'dir. Ayrıca, bir termosifon döngüsü için Nusselt sayısı tanımlanmış ve aktarılan ısının Grashof ve Prandtl sayılarına bağlı olarak değişimini veren bir bağıntı geliştirilmiştir.

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Cite This Article

BAŞARAN, T., KÜÇÜKA, M. S. (2004). A parametric study of flow and heat transfer in closed thermosyphon loop. Mühendislik Bilimleri Dergisi, Cilt: 10 - Sayı: 1, 127–135. https://ajindex.com/articles/289207

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