Heat transfer in a sodium--potassium heat exchanger (potassium boiler) made of helically-coiled tubes
Results of an experimental study of heat transfer and its crisis for potassium boiling in (stainless-steel or niobium-alloy) tubes heated by electricity or by hot sodium are described. The relationships governing the process are analyzed and expressions are derived for the potassium boiling heat transfer rate, critical heat fluxes, transcritical heat transfer rates and convective heat transfer over the hot sodium temperature range of 880 to 1350/sup 0/K. The tube wall temperature along the coil is calculated from the above relationships and is then compared with experimental data; the comparison points to satisfactory agreement. The results are an addition to the theory of processes occurring in coiled-tube vapor generators, and the empirical equations obtained are recommended for design of coiled-tube liquid metal boilers.
- OSTI ID:
- 7094620
- Journal Information:
- Heat Transfer - Sov. Res.; (United States), Journal Name: Heat Transfer - Sov. Res.; (United States) Vol. 8:3; ISSN HTSRA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420200* -- Engineering-- Facilities
Equipment
& Techniques
420400 -- Engineering-- Heat Transfer & Fluid Flow
ALKALI METALS
BOILERS
BOILING
CRITICAL HEAT FLUX
ELEMENTS
ENERGY TRANSFER
HEAT EXCHANGERS
HEAT FLUX
HEAT TRANSFER
HEATING
METALS
PERFORMANCE
PHASE TRANSFORMATIONS
POTASSIUM
PRESSURE DEPENDENCE
SODIUM
STEAM GENERATORS
SUPERHEATING
TEMPERATURE DISTRIBUTION
TUBES
VAPOR GENERATORS