Studies on MHD flow characteristics and heat transfer of liquid metal two-phase flow cooling systems for magnetically confined fusion reactor
- Tokyo Inst. of Technology (Japan); and others
The first wall and blanket cooling systems using liquid metals such as Li, Li-Pb alloys and K are superior to those using normal fluids such as He or water because of liquid metals` higher heat transfer characteristics, lower operational pressure at high temperature, and simpler system of tritium self-breeding. However, under a magnetic field as high as about 10T in a magnetic confined fusion reactor, the liquid metal single-phase flow cooling system receives very high MHD pressure drop and the enhancement of heat transfer, the authors have proposed advanced cooling systems which employ the following liquid metal two-phase flows: a He-Li two-phase annular-mist flow and low-pressure Li or K boiling flows, because it has been expected that overall electrical conductivity can be reduced in the two-phase mixture and the laminarization may be suppressed by two-phase agitating motions. The He-Li two-phase flow system has an additional merit of preheating the cooling circuit by hot helium flow before lithium charge, and the liquid metal boiling flow system has the merits of its simplicity and high thermal efficiency by constructing topping cycle. The advantages of these liquid metal two-phase flow cooling systems are discussed as well as their disadvantages.
- OSTI ID:
- 196879
- Report Number(s):
- CONF-940664-; TRN: 95:005767-0047
- Resource Relation:
- Conference: ISFNT-3: international symposium on fusion nuclear technology, Los Angeles, CA (United States), 27 Jun - 1 Jul 1994; Other Information: PBD: 1994; Related Information: Is Part Of Third international symposium on fusion nuclear technology; PB: 362 p.
- Country of Publication:
- United States
- Language:
- English
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