Numerical optimization of baffle configuration in header of heat exchanger using sequential approximate optimization

Kitayama, Satoshi; MIYAMOTO, Kohei; Izutsu, Rihito; Tabuchi, Sadaharu; Yamada, Sayaka

doi:10.1016/j.simpat.2021.102429

Cited by 6 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, this assumption is not realistic, based on actual HX operation. Because of the HX shape and complex operating conditions, the flow distribution of each single tube is significantly different; this is called flow maldistribution [5][6][7]. Flow maldistribution is one of the factors that significantly influences the performance of HXs, leading to a reduction of heat transfer efficiency.…”

Section: Introductionmentioning

confidence: 99%

Reducing the Flow Maldistribution in Heat Exchangers through a Novel Polymer Manifold: Numerical Evaluation

Zhang,

Yang,

et al. 2023

Energies

View full text Add to dashboard Cite

The maldistribution of working fluid is one of the issues in heat exchangers that causes a reduction in performance of not only the heat exchanger but also the entire HVAC system. One of the methods to reduce such maldistribution is to improve manifold design to evenly distribute the flow. In the present work, an advanced maldistribution reduction manifold, which was based on a preliminary maldistribution reduction manifold, was designed to further improve the flow distribution in the heat exchanger. In the design, spiral baffles are used to create vortices in the tubes to regulate the flow in each tube. The design also keeps the tubes away from the manifold inlet to avoid direct flow from the inlet. Due to the complexity, the design of the advanced maldistribution reduction manifold is for AM only, which cannot be fabricated by traditional manufacturing. To evaluate the design, a computational fluid dynamic model is developed to study flow distribution in heat exchanger manifolds. The simulation results reveal that the relative standard deviation of the tubes in the advanced maldistribution reduction design is half of the preliminary maldistribution reduction design and about 1/20 of the reference design.

show abstract

Section: Introductionmentioning

confidence: 99%