Parametric study of boiling heat transfer in horizontal tube bundles

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5653516

Hsu, J T

Boiling heat transfer outside a section of a uniformly heated horizontal tube bundle in an upward crossflow was investigated using R-113 as the working fluid. Two in-line tube bundles with pitch-to-diameter ratios of 1.3 and 1.7 were tested. Each tube bundle had five columns and 27 rows. Heat transfer coefficients obtained from 14 instrumented tubes are reported for a variety of flow conditions. The effects of heat flux, mass velocity, pressure and pitch-to-diameter ratio of the heat transfer coefficient were determined. At high heat fluxes there was no significant variation in the heat transfer coefficient in the tube bundle. However, at low heat fluxes and mass velocities, the heat transfer coefficient increased at positions higher in the tube bundle. As pressure and mass velocity increased so did the heat transfer coefficients. The tube bundle with the larger pitch-to-diameter ration had higher heat transfer coefficients than the smaller test section at low heat fluxes. However, the differences decreased as heat flux increased. A Chen-type correlation was developed, with an S factor and an F factor being described for tube bundles, for the prediction of local tube-averaged heat transfer coefficients.

• Research Organization: Wisconsin Univ., Milwaukee, WI (USA)
• OSTI ID: 5653516
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BOILING
HEAT TRANSFER
ROD BUNDLES
TUBES
EXPERIMENTAL DATA
PRESSURE EFFECTS
VELOCITY
DATA
ENERGY TRANSFER
INFORMATION
NUMERICAL DATA
PHASE TRANSFORMATIONS
420400* - Engineering- Heat Transfer & Fluid Flow