Thermal Design Theory of Three-Fluid Heat Exchangers

D. P. Sekulić, R. K. Shah

Research output: Contribution to journalArticlepeer-review

86 Scopus citations


The thermal and hydraulic design theory of a direct-transfer-type two fluid heat exchanger (tubular, plate-type, and extended-surface exchangers) is well developed and is available in standard heat transfer literature. The well-established algorithm for thermal design of a two-fluid heat exchanger, however, has no adequate equivalent when the physical situation implies more than one thermal communication. This chapter outlines only the effectiveness- NTU (number of heat transfer units) approach and corresponding rating and sizing problems for the determination of the effectiveness or NTU for a three-fluid heat exchanger. The thermal design theory of multifluid heat exchangers (having more than three-fluid streams) and multistream plate-fin heat exchangers and the study of nonlinear problems are not considered in this chapter.

Original languageEnglish
Pages (from-to)219-328
Number of pages110
JournalAdvances in Heat Transfer
Issue numberC
StatePublished - Jan 1 1995

ASJC Scopus subject areas

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


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