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Development of diffusion welded compact heat exchanger technology.

Author(s) : MORTEAN M. V. V., CISTERNA L. R. H., PAIVA K. V., et al.

Type of article: Article

Summary

Compact heat exchangers are heat transfer equipment employed in applications where weight and volume are significantly relevant constraints, such as vehicles (automotive, maritime, avionics and space). The main characteristic of this equipment is the high heat transfer rate for small volumes. Only recently compact heat exchangers have received greater attention from the researchers, and therefore, manufacturing processes and mathematical modeling still demand development. The main objective of this work is to present and analyze four new fabrication technologies for compact heat exchanger cores, resulting in small cross sectional controlled geometry. Three of them consist of sandwiches of flat plates filled with: parallel circular wires, rectangular wires or rectangular tubes. The fourth consists of stacking flat plates interfiled with water jet machined plates. In all these procedures, stacks of metal layers are formed and diffusion bonding process is proposed for soldering. Copper prototypes were constructed to test the fabrication technologies. Results showed that stacking layers of machined comb-like plates interfiled with flat plates is the most promising fabrication technology, which was used to construct a copper prototype that was tested using water as both hot and cold fluids. The present technology was compared for both the volumetric power and the overall heat transfer coefficients with other heat exchangers, presenting an intermediate performance. Experimental results were compared favorably with numerical and analytical results from the literature.

Details

  • Original title: Development of diffusion welded compact heat exchanger technology.
  • Record ID : 30017067
  • Languages: English
  • Subject: Technology
  • Source: Applied Thermal Engineering - vol. 93
  • Publication date: 2016/01/25
  • DOI: http://dx.doi.org/10.1016/j.applthermaleng.2015.09.021

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