Dryout heat flux in a volumetrically heated porous bed

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5747997

Tsai, F P

The effects of system pressure, bottom forced flow, and bed multi-dimensionality on dryout heat flux of a volumetrically heated porous bed were studied both experimentally and numerically. The pressure effects were studied by conducting experiments with system pressure varied from 4.9 psia to 14.7 psia. The heat flux scaling factor was modified to be able to scale the dryout data of small particle beds. Then, the bottom flow effects were studied experimentally. Freon-113, methanol, and water were used. The flow rate was varied from no flow to a value that the bottom forced flow dominated the dryout process. The dryout heat flux increases as the inlet mass flux increases. The asymptotic limit is the total evaporation energy of the inlet flow. The measured data were correlated to be within 20% error. In the mean time, pressure drop across the bed was also measured. Several calculations were made and compared reasonably well with the measurements. Besides, the multi-dimensional effects on dryout were studied experimentally. The apparatus was built such that the heated bed was surrounded by unheated glass beads. The diameter of the heated bed varied from 3.0 cm to 7.5 cm. The dryout heat flux was found to be a strong function of the bed configuration. If the diameter of the heated bed is small, the dryout heat flux is considerably higher than that of a similar 1-D bed. However, as the heated bed diameter increases, the dryout heat flux decreases very rapidly, i.e. the multi-dimensional effects are important only when the heated bed diameter is small. Finally, a set of three nonlinear partial differential equation was solved numerically to developed a methodology to simulate two-phase flow process inside a porous bed. The calculated results agree well with the measured data.

• Research Organization: California Univ., Los Angeles, CA (USA)
• OSTI ID: 5747997
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALCOHOLS
BENCH-SCALE EXPERIMENTS
ENGINEERING
ENHANCED RECOVERY
EVAPORATION
FLOW MODELS
FLUID FLOW
FREONS
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT FLUX
HYDROGEN COMPOUNDS
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MANY-DIMENSIONAL CALCULATIONS
MATERIALS
MATHEMATICAL MODELS
METHANOL
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
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PHASE TRANSFORMATIONS
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PRESSURE DEPENDENCE
PRESSURE DROP
RECOVERY
RESERVOIR ENGINEERING
THERMAL RECOVERY
TWO-PHASE FLOW
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