BASIC EXPERIMENTAL STUDIES OF BOILING FLUID FLOW AND HEAT TRANSFER AT ELEVATED PRESSURES. Monthly Progress Report for Month of February 1963

Technical Report · Thu Feb 28 04:00:00 EST 1963

OSTI ID:4733615

Matzner, B

During February 1962, 44 instrumented burnout points and 38 points for conditions beyond the instrumented burnout point were obtained for a bundle of 19 electrically heated rods with vertical upflow of boiling water at 1000 psig. This test section consisted of (19) 0.550 in. OD lieater tubes on 0.633 in. centers with a 6 ft heated length and contained in a 3.195 in ID housing tube. Twelve of the rods were wrapped with 0.083 in. OD hypodermic needle tubing. The range of variables covered in these tests were: instrumented burnout heat flux, 0.25 --0.74 x 10/sup 6/ Btu/hr-ft/sup 2/; exit steam quality, 17 --60%; inlet subcooling, 20 -295 deg F; mass velocity, 0.5--2.0 x 10/sup 6/ lb/hr-ft/sup 2/; max. d-c power input, 3.35 Mw. In general the burnout points for this 6-ft bundle were somewhat lower than those reported previously for 3-ft bundles of the same cross section. Above an exit quality of about 24%, a strong reverse mass velocity effect was observed which had not been noted for the shorter 3-ft bundles. The heat transfer coefficients measured at the downstream end of the test section were about 25% lower than those for the shorter 3-ft bundles. For the tests beyond the instrumented burnout point, heater wall temperatures of 700, 800, 900, and 1000 deg F were successively measured. Noted temperature rises were not of the very rapid type characteristic of the low quality nucleate boiling region. Only the wrapped rods showed evidence of severe overheating at the conclusion of the tests. (auth)

• Research Organization: Columbia Univ., New York. Engineering Research Labs.
• NSA Number: NSA-17-018274
• OSTI ID: 4733615
• Report Number(s): TID-18296; MPR-XIII-2-63
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
BURNOUT
CONFIGURATION
CONTAMINATION
COOLING
CURRENTS
DETECTION
EFFICIENCY
ELECTRICITY
ENGINEERING AND EQUIPMENT
HEAT TRANSFER
HEATING
HOT SPOT
INSTRUMENTS
LABORATORY EQUIPMENT
MASS
MEASURED VALUES
NUCLEATE BOILING
PERFORMANCE
POWER
RADIOACTIVITY
STEAM
STEAM QUALITY
SUBCOOLING
SUPERHEATING
SURFACES
TEMPERATURE
TUBES
VELOCITY
WATER