A new configuration of bend tubes for compound optimization of heat and fluid flow

作者：Hajmohammadi M R^*; Eskandari H; Saffar Avval M; Campo A

来源：Energy, 2013, 62: 418-424.

DOI：10.1016/j.energy.2013.09.046

• Bend tube
• Curved tube
• Optimization
• Entropy generation minimization
• Heat exchanger
• Pressure drop

Curved pipes constitute essential components in engineering systems such as heat exchangers, and process pipelines. In curved pipes with 180 degrees bends, the excess pressure drop, and the excess entropy generation (through heat and fluid flow) bring forth serious penalties. To overcome these difficulties a new partially curved pipe will be examined in this paper. It consists of three straight pipe segments connected with two 90 degrees bends. The pressure drop and entropy generation are determined numerically for several configurations of %26apos;partially curved%26apos; pipes when the fluid flow is laminar, viscous and incompressible. It is shown that the new curved pipe is advantageous because the pressure drop and entropy generation are considerably reduced when implementing the optimum layout, compared to the standard case of a fully curved section with 180 bend. As an added value, it is shown that the new optimum partially curved pipes are almost independent of Reynolds and Prandtl numbers.

• 出版日期2013-12-1