Liquid heaters and vaporizers – Feeders – Automatic
Patent
1975-07-08
1977-09-27
Sprague, Kenneth W.
Liquid heaters and vaporizers
Feeders
Automatic
122 32, 176 20R, 165 40, F22B 106, F22D 526
Patent
active
040504182
ABSTRACT:
Heat produced in a fast breeder reactor is introduced out of the reactor by liquid sodium into an intermediate heat-exchanger where the heat is transferred to the secondary coolant sodium. In an evaporator, vapor is generated by heat-exchange between the secondary coolant sodium and feed-water supplied thereto through a feed-water valve. In a superheater, superheated vapor is obtained through heat-exchange between the secondary coolant sodium and the vapor supplied from the evaporator. The superheated vapor is introduced into a turbine to drive the same. A permissible vapor temperature which is higher than a saturated temperature is established in dependence on the vapor pressure at the outlet of the evaporator. The flow rate of the feed-water is reduced by closing the feed-water valve when the vapor temperature at the outlet of the evaporator is close to the saturated temperature. The result is that the super-heater is prevented from suffering from the damage of liquid water because the super-heater is weak in liquid water.
REFERENCES:
patent: 3126053 (1964-03-01), Brunner
patent: 3247069 (1966-04-01), Powell et al.
patent: 3253994 (1966-05-01), Kagi
patent: 3349003 (1967-10-01), Kagi
patent: 3369971 (1968-02-01), Kagi
patent: 3434924 (1969-03-01), Pouderoux
Hitachi , Ltd.
Sprague Kenneth W.
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