Boiling heat transfer in a small horizontal rectangular channel

Conference · Sun Aug 01 04:00:00 EDT 1993

OSTI ID:10184288

Tran, T N; Wambsganss, M W; Jendrzejczyk, J A ^[1]; France, D M ^[2]

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1. Argonne National Lab., IL (United States)
2. Illinois Univ., Chicago, IL (United States). Dept. of Mechanical Engineering

Compact heat exchangers have traditionally found wide application in the transportation industry, where they are used as evaporators and condensers in vapor compression cycles for air conditioning and refrigeration. Such heat exchangers possess numerous attractive features including high thermal effectiveness, small size, low weight, design flexibility, and pure counterflow, and they can accommodate multiple streams. Today, there is a widespread interest in expanding the range of application of compact heat exchangers to include phase-change heat transfer in the process industries, among others. An overall objective of this effort is to provide the basis for establishing design technology in this area. In the present study, small channel flow boiling heat transfer was extended to a rectangular channel (4.06 {times} 1.70 mm) using refrigerant 12 (R-12). As with the circular tube studies, the flow channel wall was electrically heated providing a constant heat flux. Tests were performed over a quality range of 0.15 to 0.80, and large ranges of mass fluxes (50 to 400 kg/m{sup 2}s) and heat flux (4 to 34 kW/m{sup 2}). Heat transfer was measured and results are compared with correlation predictions.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10184288
• Report Number(s): ANL/MCT/CP--78815; CONF-930830--27; ON: DE93019527
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400
BOILING
FLUID FLOW
HEAT EXCHANGERS
HEAT TRANSFER
HEAT TRANSFER AND FLUID FLOW
MATHEMATICAL MODELS
RECTANGULAR CONFIGURATION
TEST FACILITIES
TUBES