Local heat transfer coefficients for forced-convection condensation of steam in a vertical tube in the presence of a noncondensable gas
- Massachusetts Inst. of Tech., Cambridge (United States)
An experimental investigation has been conducted to determine the local condensation heat transfer coefficient (HTC) of steam in the presence of air or helium flowing downward inside a 46-mm-i.d. vertical tube. The gas-steam mixture flow rate was measured with a calibrated vortex flowmeter before it entered the 2.54-m-long test condenser. Cooling water flow rate in an annulus around the tube was measure with a calibrated rotameter. Temperatures of the cooling water, the gas-steam mixture, and the tube inside and outside surfaces were measured at 0.3-m intervals in the test condenser. Inlet and exit pressures and temperatures of the gas-steam mixture and of the cooling water were also measured. The local heat flux was obtained from the slope of the coolant axial temperature profile and the coolant mass flow rate. It was found that for the same mass fraction of the noncondensable gas, compared with air, helium has a more inhibiting effect on the heat transfer, but for the same molar ratio, air was found to be more inhibiting. An application where there is important is the proposed advanced passive boiling water reactor design (Simplified Boiling Water Reactor), which utilizes the isolation condenser as a main component of the passive containment cooling system (PCCS).
- OSTI ID:
- 6552658
- Journal Information:
- Nuclear Technology; (United States), Journal Name: Nuclear Technology; (United States) Vol. 102:3; ISSN 0029-5450; ISSN NUTYBB
- Country of Publication:
- United States
- Language:
- English
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Light-Water Moderated
Boiling Water Cooled
AIR
BWR TYPE REACTORS
CONDENSERS
CONVECTION
COOLING SYSTEMS
DESIGN
ELEMENTS
ENERGY TRANSFER
ENRICHED URANIUM REACTORS
FLOWMETERS
FLUIDS
FORCED CONVECTION
GASES
HEAT FLUX
HEAT TRANSFER
HELIUM
MASS TRANSFER
MEASURING INSTRUMENTS
METERS
NONMETALS
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POWER REACTORS
RARE GASES
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
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STEAM
STEAM CONDENSERS
THERMAL REACTORS
VAPOR CONDENSATION
VAPOR CONDENSERS
WATER COOLED REACTORS
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