Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Patent
1985-02-28
1986-12-16
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
60677, F01K 1702
Patent
active
046286934
ABSTRACT:
IP or HP casing for a turbine designed for cogeneration of electric power and heat for district heating purposes, comprising blades carried by a rotor (31) rotating in a stator (32), an inlet steam admission (8'), two exhausts (12' and 17') at different pressures p.sub.1 and p.sub.2 (p.sub.2 >p.sub.1) feeding a LP section (4) of the turbine, and two further exhausts (15', 20') at pressures p.sub.1 and p.sub.2 feeding two district heating heat exchangers (22, 23) arranged in series, each of said exchangers providing substantially half of the heating output. Turbine efficiency is improved by providing a single flow (27) from the steam inlet (8'), which is then split into two partial flows (28) with substantially equal steam flow rates as of a flow-splitting point located far enough from the two exhausts at pressure p.sub.2 (17', 20') so that changes in flow rates have little or no effect on the steam pressure at said flow-splitting point.
REFERENCES:
patent: 4170879 (1979-10-01), Laing et al.
patent: 4492084 (1985-01-01), Spliethoff
Alsthom-Atlantique
Ostrager Allen M.
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