# US 9,039,352 B2 · Sound attenuating chimney element for a turbomachine system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,352 B2 - Document ID: US9039352B2 - Status: Granted - Kind: B2 - Application number: 13/668,855 - Filed: 2012-11-05 - Published: 2014-05-08 - Granted: 2015-05-26 - Earliest claimed: 2012-11-05 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Eric Tracy Watson; Joseph Gabriel Harris; Quoc Hoai Nguyen; Yunyi Zou - Web page: https://patentgrep.com/patent/US9039352B2 ## CPC - F01D 25/30: Exhaust heads, chambers, or the like - F02C 7/24: Heat or noise insulation (air intakes having provisions for noise suppression F02C7/045; turbine exhaust heads, chambers, or the like F01D25/30; silencing nozzles of jet-propulsion plants F02K1/00) - G10K 11/168: Plural layers of different materials, e.g. sandwiches - F05D 2260/96: Preventing, counteracting or reducing vibration or noise - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A sound attenuating chimney element for a turbomachine system includes a high density outer body having an external surface and an internal surface, and one or more acoustic attenuation layers provided on the external surface of the outer body. The one or more acoustic attenuation layers include an outer surface portion and an inner surface portion. A structural layer is provided on the outer surface portion of the one or more acoustic attenuation layers. The structural layer includes an external surface that defines a duct configured and disposed to pass gases from the turbomachine system. ## Claims ### Claim 1 A sound attenuating chimney element for a turbomachine system comprising: a high density outer body including an external surface and an internal surface; one or more acoustic attenuation layers provided on the internal surface of the high density outer body, the one or more acoustic attenuation layers including an outer surface portion and an inner surface portion; and a structural layer comprising concrete provided on the inner surface portion of the one or more acoustic attenuation layers, the structural layer including an internal surface section that defines a duct configured and disposed to pass exhaust gases from the turbomachine system. ### Claim 2 (depends on 1) The sound attenuating chimney element according to claim 1, wherein the high density outer body comprises steel. ### Claim 3 (depends on 2) The sound attenuating chimney element according to claim 2, wherein the steel comprises 16-gauge steel. ### Claim 4 (depends on 1) The sound attenuating chimney element according to claim 1, wherein the one or more acoustic attenuation layers include a first acoustic attenuation layer including a first inner surface portion and a first outer surface portion and a second acoustic attenuation layer including a second inner surface portion and a second outer surface portion, the second outer surface portion abutting the first inner surface portion. ### Claim 5 (depends on 4) The sound attenuating chimney element according to claim 4, wherein the first acoustic attenuation layer comprises a substantially pliable material. ### Claim 6 (depends on 5) The sound attenuating chimney element according to claim 5, wherein the substantially pliable material comprises a fiber-blanket. ### Claim 7 (depends on 4) The sound attenuating chimney element according to claim 4, wherein the second acoustic attenuation layer comprises a substantially rigid material. ### Claim 8 (depends on 7) The sound attenuating chimney element according to claim 7, wherein the substantially rigid material comprises fiber board. ### Claim 9 (depends on 4) The sound attenuating chimney element according to claim 4, wherein the first acoustic attenuation layer includes a first thickness and the second acoustic attenuation layer includes a second thickness, the second thickness being about twice the first thickness. ### Claim 10 (depends on 9) The sound attenuating chimney element according to claim 9, wherein the structural layer includes a third thickness, the third thickness being about four times the second thickness. ### Claim 11 (depends on 1) The sound attenuating chimney element according to claim 1, wherein the concrete comprises reinforced concrete. ### Claim 12 (depends on 1) The sound attenuating chimney element according to claim 1, wherein the sound attenuating chimney element comprises a sound attenuating chimney stack base including one or more openings extending through the high density outer body to the duct. ### Claim 13 (depends on 12) The sound attenuating chimney element according to claim 12, further comprising: one or more diffusers provided in respective ones of the one or more openings. ### Claim 14 A turbomachine system comprising: a compressor portion; a turbine portion fluidically connected to the compressor portion; a fluid duct fluidically coupled to one of the compressor portion and the turbine portion; and a sound attenuating chimney element mechanically linked to the fluid duct, the sound attenuating chimney element comprising: a high density outer body including an external surface and an internal surface; one or more acoustic attenuation layers provided on the internal surface of the high density outer body, the one or more acoustic attenuation layers including an outer surface portion and an inner surface portion; and a structural layer comprising concrete provided on the inner surface portion of the one or more acoustic attenuation layers the structural layer including an internal surface section that defines a duct configured and disposed to pass exhaust gases from the turbomachine system. ### Claim 15 (depends on 14) The turbomachine system according to claim 14, wherein the high density outer body comprises steel. ### Claim 16 (depends on 14) The turbomachine system according to claim 14, wherein the one or more acoustic attenuation layers include a first acoustic attenuation layer including a first inner surface portion and a first outer surface portion and a second acoustic attenuation layer including a second inner surface portion and a second outer surface portion, the second outer surface portion abutting the first inner surface portion. ### Claim 17 (depends on 16) The turbomachine system according to claim 16, wherein the first acoustic attenuation layer comprises a fiber-blanket and the second acoustic attenuation layer comprises a fiber board. ### Claim 18 (depends on 16) The turbomachine system according to claim 16, wherein the first acoustic attenuation layer includes a first thickness, the second acoustic attenuation layer includes a second thickness, and the structural layer includes a third thickness, the second thickness being about twice the first thickness and the third thickness being about four times the second thickness. ### Claim 19 (depends on 14) The turbomachine system according to claim 14, further comprising: an intercooler fluidically connected to the compressor portion, the intercooler being fluidically connected to the sound attenuating chimney element through the fluid duct.