F - Mech Eng,Light,Heat,Weapons – 01 – K
Patent
F - Mech Eng,Light,Heat,Weapons
01
K
60/51
F01K 7/22 (2006.01) F01D 25/08 (2006.01) F01K 13/02 (2006.01)
Patent
CA 1145567
17TU-2815 ABSTRACT OF THE DISCLOSURE Method and apparatus to limit and control rotational loss heating such as occurs in a large steam turbine in the bypass mode of operation under no-load and low-load operating conditions. According to the invention, a portion of the high pressure bypass steam is admitted to the lower pressure sections of the turbine to provide motive fluid for driving the turbine while, simultaneously, a second portion of the high-pressure bypass steam is admitted to the high-pressure section of the turbine in a reverse-flow direction to pass backwards therethrough and limit the rotational loss heating. The two flows may be proportioned to control rotational loss heating in both the high-pressure and lower pressure sections of the turbine. A reverse-flow valve and a ventilator valve are provided for routing the reverse-flow of steam.
366133
Koran Kenneth W.
Parry William T.
Company General Electric
Eckersley Raymond A.
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