Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Patent
1974-12-16
1976-03-30
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
122479R, 122479S, F01K 1302
Patent
active
039465667
ABSTRACT:
Method and apparatus are described that are operative to elevate the temperature of superheated vapor delivered to a turbine, especially during startup of a power plant. A bypass circuit containing a heat exchanger is interposed in the main steam generator evaporative flow circuit whereby regulated amounts of heat are extracted from the plant operating fluid thereby subcooling the same prior to its passage to the evaporator section of the unit. Reduced amounts of steam are thus produced in the evaporator section for a given amount of heat input to the unit and a concomitant increase realized in the temperature to which the steam passed to the superheater is heated.
Economies as well as operational advantages are achieved by the production in the heat exchanger of low pressure steam that is usable in the plant to augment steam flow to the low pressure section of the turbine, for soot blowing purposes, and/or for other low pressure steam needs during startup and normal operation of the plant.
REFERENCES:
patent: 3205664 (1965-09-01), Nettel
patent: 3264826 (1966-08-01), Kane et al.
Combustion Engineering Inc.
Olson Robert L.
Ostrager Allen M.
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