Patents by Inventor Chul Woo ROH
Chul Woo ROH has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11028711Abstract: According to the present invention, part of carbon dioxide heated by a heater is supplied to a dry gas seal portion of a compressor so that a device for pressurizing and heating a seal gas is not additionally required, configuration can be simplified and cost can be reduced. In addition, a seal gas flow path includes a low-temperature seal gas flow path and a high-temperature seal gas flow path so that, in an initial driving mode, carbon dioxide heated by a high-temperature portion of the heater is used as a seal gas and in a turbine-driving mode, carbon dioxide heated by a low-temperature portion of the heater is used as a seal gas and thus a more efficient operation can be performed.Type: GrantFiled: June 26, 2019Date of Patent: June 8, 2021Assignee: KOREA INSTITUTE OF ENERGY RESEARCHInventors: Jun Hyun Cho, Bong Su Choi, Ho Sang Ra, Hyung Ki Shin, Jong Jae Cho, Beom Joon Lee, Chul Woo Roh, Gil Bong Lee, Young Jin Baik
-
Publication number: 20200131920Abstract: According to the present invention, part of carbon dioxide heated by a heater is supplied to a dry gas seal portion of a compressor so that a device for pressurizing and heating a seal gas is not additionally required, configuration can be simplified and cost can be reduced. In addition, a seal gas flow path includes a low-temperature seal gas flow path and a high-temperature seal gas flow path so that, in an initial driving mode, carbon dioxide heated by a high-temperature portion of the heater is used as a seal gas and in a turbine-driving mode, carbon dioxide heated by a low-temperature portion of the heater is used as a seal gas and thus a more efficient operation can be performed.Type: ApplicationFiled: June 26, 2019Publication date: April 30, 2020Applicant: KOREA INSTITUTE OF ENERGY RESEARCHInventors: Jun Hyun CHO, Bong Su CHOI, Ho Sang RA, Hyung Ki SHIN, Jong Jae CHO, Beom Joon LEE, Chul Woo ROH, Gil Bong LEE, Young Jin BAIK
-
Publication number: 20200095885Abstract: 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.Type: ApplicationFiled: November 1, 2017Publication date: March 26, 2020Applicant: KOREA INSTITUTE OF ENERGY RESEARCHInventors: Hyung Ki SHIN, Jun Hyun CHO, Young Jin BAIK, Gil Bong LEE, Beom Joon LEE, Chul Woo ROH, Ho Sang RA, Jong Jae CHO
-
Publication number: 20190323704Abstract: In the present invention, a recuperator is used in a refrigerant cycle to make a heat exchange between a refrigerant generated in a condenser and a refrigerant before flowing into a compressor, thereby supercooling the refrigerant to minimize the quality of the refrigerant introduced into an evaporator, elevating temperatures at an inlet and an outlet of the compressor, and increasing condensed heat of the condenser. In the present invention, a recuperator is used to increase condensed heat of the condenser, leading to increasing the heat which circulation water circulating in a steam producing cycle receives from the condenser, whereby steam production efficiency can be improved.Type: ApplicationFiled: November 1, 2017Publication date: October 24, 2019Applicant: KOREA INSTITUTE OF ENERGY RESEARCHInventors: Beom Joon LEE, Gil Bong LEE, Young Jin BAIK, Hyung Ki SHIN, Jun Hyun CHO, Chul Woo ROH, Ho Sang RA, Eun Seok WANG, Young Soo LEE
-
Patent number: 10233785Abstract: In a steam turbine power generation system according to the present invention, a regenerator and an ejector are selectively operated according to outdoor air temperature so that the effects of the outdoor air temperature can be minimized and thus an increase in back pressure of a turbine is prevented and thus the operating efficiency of the steam turbine power generation system can be guaranteed. In addition, when the outdoor air temperature is lower than a set temperature, only a steam condenser and an air cooling condenser are used, and when the outdoor air temperature is equal to or higher than the set temperature, the regenerator and the ejector are operated so that the condensation efficiency of the air cooling condenser is improved and thus the cooling efficiency of the steam turbine power generation system can be maximized.Type: GrantFiled: August 29, 2017Date of Patent: March 19, 2019Assignee: KOREA INSTITUTE OF ENERGY RESEARCHInventors: Gil Bong Lee, Beom Joon Lee, Chul Woo Roh, Ho Sang Ra, Young Jin Baik
-
Publication number: 20190063264Abstract: In a steam turbine power generation system according to the present invention, a regenerator and an ejector are selectively operated according to outdoor air temperature so that the effects of the outdoor air temperature can be minimized and thus an increase in back pressure of a turbine is prevented and thus the operating efficiency of the steam turbine power generation system can be guaranteed. In addition, when the outdoor air temperature is lower than a set temperature, only a steam condenser and an air cooling condenser are used, and when the outdoor air temperature is equal to or higher than the set temperature, the regenerator and the ejector are operated so that the condensation efficiency of the air cooling condenser is improved and thus the cooling efficiency of the steam turbine power generation system can be maximized.Type: ApplicationFiled: August 29, 2017Publication date: February 28, 2019Applicant: KOREA INSTITUTE OF ENERGY RESEARCHInventors: Gil Bong LEE, Beom Joon LEE, Chul Woo ROH, Ho Sang RA, Young Jin BAIK
-
Patent number: 9926814Abstract: A supercritical CO2 generation system including a compressor configured to compress a working fluid; a first heat exchanger that exchanges heat with the working fluid passing through the compressor; a high temperature turbine that expands the working fluid passing through the first heat exchanger and connects to a power generator to produce power; a second heat exchanger that exchanges heat with the working fluid passing through the compressor; a low temperature turbine that expand the working fluid passing through the second heat exchanger and connects to the power generator to produce power; a third heat exchanger between the first heat exchanger and the high temperature turbine that exchanges heat with the working fluid recuperated by the first heat exchanger; and a cooler that cools the working fluid passing through the high temperature turbine and the low temperature turbine and supplies the cooled working fluid to the compressor.Type: GrantFiled: January 21, 2016Date of Patent: March 27, 2018Assignee: DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD.Inventors: Chul Woo Roh, Sung Gju Kang, Jeong Ho Hwang
-
Publication number: 20160326916Abstract: A supercritical CO2 generation system including a compressor configured to compress a working fluid; a first heat exchanger that exchanges heat with the working fluid passing through the compressor; a high temperature turbine that expands the working fluid passing through the first heat exchanger and connects to a power generator to produce power; a second heat exchanger that exchanges heat with the working fluid passing through the compressor; a low temperature turbine that expand the working fluid passing through the second heat exchanger and connects to the power generator to produce power; a third heat exchanger between the first heat exchanger and the high temperature turbine that exchanges heat with the working fluid recuperated by the first heat exchanger; and a cooler that cools the working fluid passing through the high temperature turbine and the low temperature turbine and supplies the cooled working fluid to the compressor.Type: ApplicationFiled: January 21, 2016Publication date: November 10, 2016Applicant: DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD.Inventors: Chul Woo ROH, Sung Gju KANG, Jeong Ho HWANG