# US 11,028,724 B2 · Partial admission operation turbine apparatus for improving efficiency of continuous partial admission operation and method for operating turbine apparatus using same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,724 B2 - Document ID: US11028724B2 - Status: Granted - Kind: B2 - Application number: 16/469,941 - Filed: 2017-11-01 - Published: 2020-03-26 - Granted: 2021-06-08 - Earliest claimed: 2016-12-15 - Assignees: Korea Institute of Energy Research - Applicants: Korea Institute of Energy Research - Inventors: Hyung Ki Shin; Jun Hyun Cho; Young Jin Baik; Gil Bong Lee; Beom Joon Lee; Chui Woo Roh; Ho Sang Ra; Jong Jae Cho - Web page: https://patentgrep.com/patent/US11028724B2 ## CPC - F01D 17/105: {by passing part of the fluid} - F01D 5/141: {Shape, i.e. outer, aerodynamic form (F01D5/148 - F01D5/20 take precedence; blade construction F01D5/147)} - F01D 9/04: forming ring or sector - F01D 17/18: varying effective number of nozzles or guide conduits {, e.g. sequentially operable valves for steam turbines} - F01K 7/32: the engines using steam of critical or overcritical pressure - F01K 25/103: {Carbon dioxide (F01K25/065 takes precedence)} - F05D 2220/31: in steam turbines - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F01K: STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants F02; nuclear power plants, engine arrangements therein G21D) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract The present invention provides a partial admission operation turbine apparatus comprising: a rotor portion rotatably coupled to a rotary shaft of a turbine and including a plurality of rotor blades; a nozzle portion fixedly coupled to the rotary shaft in front of the rotor portion and guiding and supplying a working fluid to the rotor blades through a plurality of nozzle blades; and an inlet disk coupled to the rotary shaft in front of the nozzle portion in a plate shape and having a plurality of admission holes formed therein so as to supply the working fluid to the nozzle portion to partially admit the working fluid into the nozzle portion, wherein each of the admission holes is formed to have a different passage cross-sectional areas, so that the opening and closing of the admission holes are controlled according to operating flow rate conditions to control a partial admission ratio of the working fluid supplied to the nozzle portion. Due to the aforementioned feature, since continuous partial admission can be operated for a supercritical power generation system, it is possible to resolve the difficulties in designing and manufacturing turbines. Also, since the partial admission ratio can be adjusted according to operating conditions, it is possible to improve the performance of a turbine that is operated by continuous partial admission. Furthermore, even if the operating flow rate conditions change in the same cycle, it is possible to operate the same turbine with high efficiency. ## Claims ### Claim 1 A partial admission operation turbine apparatus comprising: a rotor portion rotatably coupled to a rotary shaft of a turbine and including a plurality of rotor blades; a nozzle portion disposed in front of the rotor portion and guiding and supplying a working fluid to the rotor blades through a plurality of nozzle blades; and an inlet disk disposed in front of the nozzle portion in a plate shape and having a plurality of admission holes formed therein so as to supply the working fluid to the nozzle portion to partially admit the working fluid into the nozzle portion, wherein each of the admission holes is formed to have at least two different passage cross-sectional areas, so that the opening and closing of the admission holes are controlled according to operating flow rate conditions to control a partial admission ratio of the working fluid supplied to the nozzle portion, and wherein the plurality of nozzle blades form differently a flow path passage area of the working fluid that flows between the nozzle blades due to the different passage cross-sectional areas of the admission holes. ### Claim 2 (depends on 1) The partial admission operation turbine apparatus of claim 1, wherein the partial admission operation turbine apparatus includes different separation distances between the nozzle blades due to the different passage cross-sectional areas of the admission holes. ### Claim 3 (depends on 2) The partial admission operation turbine apparatus of claim 2, wherein, in the nozzle blades, the smaller the passage cross-sectional areas of the admission holes, the shorter the separation distances between the nozzle blades. ### Claim 4 (depends on 3) The partial admission operation turbine apparatus of claim 3, wherein the nozzle blades form differently thickness ratios due to the admission holes so as to form differently the separation distances between the adjacent nozzle blades. ### Claim 5 (depends on 2) The partial admission operation turbine apparatus of claim 2, wherein the nozzle blades form differently thickness ratios due to the admission holes so as to form differently the separation distances between the adjacent nozzle blades. ### Claim 6 (depends on 1) The partial admission operation turbine apparatus of claim 1, further comprising a flow rate control unit controlling a supply flow rate of the working fluid in response to the passage cross-sectional areas of the admission holes. ### Claim 7 (depends on 6) The partial admission operation turbine apparatus of claim 6, wherein the flow rate control unit comprises: a plurality of supply lines supplying the working fluid; and a plurality of flow rate control valves respectively installed in the plurality of supply lines. ### Claim 8 (depends on 1) The partial admission operation turbine apparatus of claim 1, wherein the working fluid is in a supercritical state. ### Claim 9 (depends on 1) The partial admission operation turbine apparatus of claim 1, wherein the working fluid is supercritical carbon dioxide (CO2). ### Claim 10 (depends on 1) The partial admission operation turbine apparatus of claim 1, further comprising an opening/closing unit coupled to the inlet disk and opening or closing the plurality of admission holes. ### Claim 11 (depends on 10) The partial admission operation turbine apparatus of claim 10, wherein the opening/closing unit comprises opening/closing covers coupled to a front surface or rear surface of the inlet disk corresponding to the admission holes, the opening/closing unit having a plate shape. ### Claim 12 A method for operating a partial admission operation turbine apparatus, the method comprising: assembling a partial admission operation turbine apparatus including: rotatably coupling a rotor portion to a rotary shaft of a turbine, the rotor portion including a plurality of rotor blades; providing a nozzle portion disposed in front of the rotor portion and guiding and supplying a working fluid to the rotor blades through a plurality of nozzle blades; and providing an inlet disk disposed in front of the nozzle portion in a plate shape and forming a plurality of admission holes so as to supply the working fluid to the nozzle portion to partially admit the working fluid into the nozzle portion, wherein each of the admission holes is formed to have at least two different passage cross-sectional areas; and controlling a partial admission ratio of the working fluid supplied to the nozzle portion by opening and closing the admission holes according to set operating flow rate conditions, wherein the assembling of the partial admission operation turbine apparatus further comprises differently forming separation distances between the nozzle blades due to the passage cross-sectional areas of the opened admission holes. ### Claim 13 (depends on 12) The method of claim 12, wherein the partial admission operation turbine apparatus further comprises a flow rate control unit including a plurality of supply lines supplying the working fluid, a plurality of flow rate control valves respectively installed in the plurality of supply lines, and a controller controlling an operation of the plurality of flow rate control valves, and the controller controls a supply flow rate of the working fluid by controlling an operation of the flow rate control valves according to the passage cross-sectional areas of the admission holes. ### Claim 14 A method for operating a partial admission operation turbine apparatus, the method comprising: assembling a partial admission operation turbine apparatus including: rotatably coupling a rotor portion to a rotary shaft of a turbine, the rotor portion including a plurality of rotor blades; providing a nozzle portion disposed in front of the rotor portion and guiding and supplying a working fluid to the rotor blades through a plurality of nozzle blades; and providing an inlet disk disposed in front of the nozzle portion in a plate shape and forming a plurality of admission holes so as to supply the working fluid to the nozzle portion to partially admit the working fluid into the nozzle portion, wherein each of the admission holes is formed to have at least two different passage cross-sectional areas; and controlling a partial admission ratio of the working fluid supplied to the nozzle portion by opening and closing the admission holes according to set operating flow rate conditions, wherein, in the nozzle blades, the smaller the passage cross-sectional areas of the admission holes, the shorter the separation distances between the nozzle blades.