Heat transfer analysis on dimple geometries and arrangements in dimple jacketed heat exchanger

Research output: Contribution to journalArticle

Abstract

Purpose: The purpose of this paper is to study the effects of dimple geometries and arrangements on the heat transfer enhancement in a dimple jacketed heat exchanger. Design/methodology/approach: For the purpose of this paper, with the experimental validated numerical model, this paper carries out numerical simulations of both single dimples with different geometries and the whole dimple jacketed heat exchanger with different dimple arrangements. For a single dimple, its secondary vortex flow, temperature differences and the pressure drop performance for different geometries are analyzed. For the whole dimple jacketed heat exchanger, the heat transfer and pressure drop performances are investigated by comparing the no dimple, triangular and rectangular dimple arrangements. Findings: Results show that dimples can improve the heat transfer efficiency compared with conventional jacketed heat exchanger, and specific geometries and arrangement of dimples for better heat transfer performance are figured out. Originality/value: This paper considers both dimple geometries and arrangements, which can be useful for further applications in specific integrated devices or similar applications.

Details

Authors
Organisations
External organisations
  • Zhejiang University
  • Sinochem Group
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering

Keywords

  • Computational fluid dynamics, Dimple arrangements, Dimple jacketed heat exchanger, Geometric parameter, Heat transfer
Original languageEnglish
JournalInternational Journal of Numerical Methods for Heat and Fluid Flow
Publication statusE-pub ahead of print - 2019 Jul 31
Publication categoryResearch
Peer-reviewedYes