Effect of Thermosyphon cross section shape on the Heat Transfer Characteristics
الشريط الجانبي للمقالة
محتوى المقالة الرئيسي
الملخص
Thermosyphon is considered a heat transfer device in which its operating principle depends on the
evaporation and condensation of a working fluid which use the gravity forces to ensure the fluid
circulation. In the present paper, thermosyphon has been constructed to simulating the actual
applications to study the characteristics of heat transfer and its influence on the variation of cross
section shape. This paper, includes the procedure of a series experiments for three iron tubes in
vertical position with different cross section shape (square, rectangular and circular) having the
same hydraulic diameter and total length. Many factors have been investigate to distinguish their
effect on the heat transfer coefficient and temperature distribution on the surface. These variables
are: various cross section shape, heat input and coolant flow rate of the condenser, with the
methanol as working fluid of fixed rate at operating pressure which is near to the atmospheric
pressure. It has been demonstrated that from the total comparison of all shapes in the same
conditions, the performance of the square thermosyphon is higher than that of circular and
rectangular thermosyphon, respectively. Also, it has been found that the highest value of the heat
transfer coefficient at the square thermosyphon (1812W/m2oC) when it is compared with the
practical results of the other two types geometric shapes.
المقاييس
تفاصيل المقالة
هذا العمل مرخص بموجب Creative Commons Attribution 4.0 International License.
THIS IS AN OPEN ACCESS ARTICLE UNDER THE CC BY LICENSE http://creativecommons.org/licenses/by/4.0/
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