A new method to simultaneously measure local heat transfer and visualize flow boiling in plate heat exchanger

Shenghan Jin, Pega Hrnjak

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents the development of a novel method to combine measurement of local heat transfer coefficient and flow visualization in frame-and-plate heat exchanger (FPHE) simultaneously. A heat flux plate is built using two original chevron plates and clay as thermal infills. Thermocouples are deployed on the inner surfaces of both plates. With the known thickness and thermal conductivity of the clay, the instrumented plate functions as a heat flux sensor. After initial calibration, this plate is installed to measure fluid heat transfer from one side, while leaving visual access from the other. Preliminary results of water-water single-phase heat transfer and R245fa-water flow boiling are presented. Combined with visualization, the method provides a viable solution to relate local heat transfer with flow regime within a plate channel, while preserving the real geometry and operating condition.

Original languageEnglish (US)
Pages (from-to)635-646
Number of pages12
JournalInternational Journal of Heat and Mass Transfer
Volume113
DOIs
StatePublished - 2017

Keywords

  • Flow boiling
  • Flow visualization
  • Local heat transfer
  • Plate heat exchanger

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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