Power plants – Combustion products used as motive fluid – Combustion products generator
Reexamination Certificate
2011-03-22
2011-03-22
Cuff, Michael (Department: 3741)
Power plants
Combustion products used as motive fluid
Combustion products generator
C428S034600, C415S173400
Reexamination Certificate
active
07908867
ABSTRACT:
A ceramic hybrid structure (207, 502, 602, 608) that includes a wavy ceramic matrix composite (CMC) wall (214, 532, 603, 609) bonded with a ceramic insulating layer (230, 538, 604, 610) having a distal surface (242) that may define a hot gas passage (250, 550, 650) or otherwise be in proximity to a source of elevated temperature. In various embodiments, the waves (216, 537, 637) of the CMC wall (214, 532, 603, 609) may conform to the following parameters: a thickness (222) between 1 and 10 millimeters; an amplitude (224) between one and 2.5 times the thickness; and a period (226) between one and 20 times the amplitude. The uninsulated backside surface (218) of the CMC wall (214) provides a desired stiffness and strength and enhanced cooling surface area. In various embodiments the amplitude (224), excluding the thickness (222), may be at least 2 mm.
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E. Utriainen, B. Sundén; “Evaluation of the Cross Corrugated and Some Other Candidate Heat Transfer Surfaces for Microturbine Recuperators”; Transactions of the ASME; Jul. 2002; vol. 124; pp. 550-560; XP009108742.
Keller Douglas A.
Morrison Jay A.
Schiavo Anthony L.
Cuff Michael
Siemens Energy Inc.
Wongwian Phutthiwat
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