US 11,939,913 B2
Turbine engine with inverse Brayton cycle
Neil J. Terwilliger, Cheshire, CT (US); and Joseph B. Staubach, Colchester, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Feb. 11, 2022, as Appl. No. 17/670,045.
Prior Publication US 2023/0258125 A1, Aug. 17, 2023
Int. Cl. F02C 7/08 (2006.01); F02C 6/00 (2006.01); F02C 7/36 (2006.01)
CPC F02C 6/006 (2013.01) [F02C 7/08 (2013.01); F02C 7/36 (2013.01); F05D 2260/10 (2013.01); F05D 2260/213 (2013.01); F05D 2260/232 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An engine system, comprising:
a turbine engine comprising a compressor section, a combustor section having a burner, a turbine section, and a nozzle in an open-loop configuration, wherein the compressor section and the turbine section are mechanically coupled by a first shaft;
a bottoming-cycle apparatus comprising a bottoming-cycle compressor and a bottoming-cycle turbine coupled to a second shaft independent of the first shaft;
an exhaust heat exchanger downstream of the turbine section of the turbine engine configured to reject heat from the turbine engine to the bottoming-cycle apparatus and create a cooled turbine exhaust stream in the turbine engine from a turbine exhaust stream of the turbine section, wherein the bottoming-cycle turbine is arranged in a closed-loop configuration to expand a bottoming-cycle fluid and drive power to the second shaft after receiving heat transfer from the cooled turbine exhaust stream; and
an exhaust compressor arranged downstream of the exhaust heat exchanger and upstream of the nozzle of the turbine engine configured to compress the cooled turbine exhaust stream and increase a pressure of the cooled turbine exhaust stream prior to exiting the nozzle of the turbine engine, wherein the exhaust compressor is mechanically coupled to the turbine section by at least one shaft.