Heat transfer with phase change in plate-fin heat exchangers

Conference · Sun Jan 01 00:00:00 EST 1984

OSTI ID:6820209

Panchal, C B

A theoretical and experimental study was conducted for convective evaporation and condensation in plate-fin compact heat exchangers. The overall performance of a brazed-aluminum heat exchanger in the evaporation mode with ammonia and in the condensation mode with both ammonia and refrigerant R-22 as working fluids. The heat exchanger has straight perforated fins on the working-fluid side and extruded rectangular channels on the single-phase (water) side. The two-phase flow in narrow channels of the heat exchanger is modeled using a triangular relationship between pressure gradient, liquid film flow rate, and film thickness. The overall performance of the heat exchanger is calculated by employing local heat-transfer analysis and integrating mass- and heat-balance equations along the heat-exchanger length. Theoretical predictions are found to agree favorably with experimental results for a prototypical heat exchanger unit.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 6820209
• Report Number(s): CONF-840816-4; ON: DE84006405
• Resource Relation: Conference: 22. national heat transfer conference, Niagara Falls, NY, USA, 5 Aug 1984
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
HEAT EXCHANGERS
PERFORMANCE
PHASE CHANGE MATERIALS
AMMONIA
EVAPORATION
FINS
FLOW MODELS
FLOW RATE
HEAT TRANSFER
PLATES
PRESSURE DROP
REFRIGERANTS
TWO-PHASE FLOW
VAPOR CONDENSATION
ENERGY TRANSFER
FLUID FLOW
FLUIDS
HYDRIDES
HYDROGEN COMPOUNDS
MATERIALS
MATHEMATICAL MODELS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
PHASE TRANSFORMATIONS
WORKING FLUIDS
420400* - Engineering- Heat Transfer & Fluid Flow