Patents by Inventor Dae-Keun Lee

Dae-Keun Lee 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: 11466618
    Abstract: The present invention provides a direct-fired supercritical carbon dioxide power generation system and a power generation method thereof, the system comprising: a combustor for burning hydrocarbon fuel and oxygen; a turbine driven by combustion gas discharged from the combustor; a heat exchanger for cooling combustion gas discharged after driving the turbine, by heat exchange with combustion gas recycled and supplied to the combustor; and an air separation unit for separating air to produce oxygen, wherein a portion of the combustion gas discharged after driving the turbine is branched before being introduced to the heat exchanger and is supplied to the air separation unit.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: October 11, 2022
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Dae-Keun Lee, Dong-Soon Noh, Chang-Bog Ko, Young-Tae Guahk, Seung-Gon Kim, Min-Jung Lee, Eun-Kyung Lee, Woo-Nam Jung, Nam-Su Kim
  • Patent number: 11433384
    Abstract: A nitrogen-doped catalyst for oxidative coupling of methane, which is a catalyst for obtaining a C2 hydrocarbon product with high yield, and a method for manufacturing the catalyst are provided. An embodiment of the present inventive concept relates to a nitrogen-doped catalyst for oxidative coupling of methane having a silica support; and sodium tungstate and manganese supported on the support.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: September 6, 2022
    Assignee: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Hee-yeon Kim, Tae-woo Kim, Ji-haeng Yu, Dae Keun Lee
  • Publication number: 20220161249
    Abstract: A nitrogen-doped catalyst for oxidative coupling of methane, which is a catalyst for obtaining a C2 hydrocarbon product with high yield, and a method for manufacturing the catalyst are provided. An embodiment of the present inventive concept relates to a nitrogen-doped catalyst for oxidative coupling of methane having a silica support; and sodium tungstate and manganese supported on the support.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 26, 2022
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Hee-yeon KIM, Tae-woo Kim, Ji-haeng Yu, Dae Keun Lee
  • Publication number: 20210404381
    Abstract: The present invention provides a direct-fired supercritical carbon dioxide power generation system and a power generation method thereof, the system comprising: a combustor for burning hydrocarbon fuel and oxygen; a turbine driven by combustion gas discharged from the combustor; a heat exchanger for cooling combustion gas discharged after driving the turbine, by heat exchange with combustion gas recycled and supplied to the combustor; and an air separation unit for separating air to produce oxygen, wherein a portion of the combustion gas discharged after driving the turbine is branched before being introduced to the heat exchanger and is supplied to the air separation unit.
    Type: Application
    Filed: September 30, 2019
    Publication date: December 30, 2021
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Dae-Keun LEE, Dong-Soon NOH, Chang-Bog KO, Young-Tae GUAHK, Seung-Gon KIM, Min-Jung LEE, Eun-Kyung LEE, Woo-Nam JUNG, Nam-Su KIM
  • Patent number: 10836128
    Abstract: An embodiment of the present invention provides an air injection valve-integrated spray for spraying and applying polyurethane foam to a desired portion of a tire. The spray includes a polyurethane foam chamber disposed at an end of a coupling portion and keeping polyurethane foam under pressure and an air delivery chamber delivering air injected from an air injection valve to a breaking portion of the polyurethane foam chamber, in which the breaking portion of the polyurethane foam chamber is broken by air coming out of the air delivery chamber, so the polyurethane foam is sprayed.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: November 17, 2020
    Assignee: HANKOOK TIRE CO., LTD.
    Inventor: Dae-Keun Lee
  • Patent number: 10465905
    Abstract: The present invention relates to a combustion device 100 for burning refractory hazardous gases and a burning method for the combustion device. More particularly, the combustion device 110 for burning refractory hazardous gases, which is provided in a scrubber system 1 for burning waste gases, the combustion device 110 includes: a first porous body 141; a second porous body 142; and an igniter for forming a flame surface 143 at the interior of the combustion device 110, wherein the flame surface 143 formed by the igniter is located between the first porous body 141 and the second porous body 142, and so as to form the flame surface 143, at least one of the first porous body 141 and the second porous body 142 is moved to conduct excess enthalpy combustion.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: November 5, 2019
    Assignee: Korea Institute of Energy Research
    Inventors: Dae Keun Lee, Seung-gon Kim, Dong-soon Noh, Chang-bog Ko, Young-tae Guahk
  • Publication number: 20170341324
    Abstract: An embodiment of the present invention provides an air injection valve-integrated spray for spraying and applying polyurethane foam to a desired portion of a tire. The spray includes a polyurethane foam chamber disposed at an end of a coupling portion and keeping polyurethane foam under pressure and an air delivery chamber delivering air injected from an air injection valve to a breaking portion of the polyurethane foam chamber, in which the breaking portion of the polyurethane foam chamber is broken by air coming out of the air delivery chamber, so the polyurethane foam is sprayed.
    Type: Application
    Filed: April 7, 2017
    Publication date: November 30, 2017
    Inventor: Dae-Keun Lee
  • Publication number: 20170102143
    Abstract: The present invention relates to a combustion device 100 for burning refractory hazardous gases and a burning method for the combustion device. More particularly, the combustion device 110 for burning refractory hazardous gases, which is provided in a scrubber system 1 for burning waste gases, the combustion device 110 includes: a first porous body 141; a second porous body 142; and an igniter for forming a flame surface 143 at the interior of the combustion device 110, wherein the flame surface 143 formed by the igniter is located between the first porous body 141 and the second porous body 142, and so as to form the flame surface 143, at least one of the first porous body 141 and the second porous body 142 is moved to conduct excess enthalpy combustion.
    Type: Application
    Filed: March 26, 2015
    Publication date: April 13, 2017
    Applicant: KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Dae Keun Lee, Seung-gon KIM, Dong-soon NOH, Chang-bog KO, Young-tae GUAHK
  • Patent number: 5771705
    Abstract: An operating method for a room air conditioner(RAC) which is capable of enhancing an alertness level of a user based upon a human electroencephalogram(EEG), includes inputting an alertness operation mode key when the user desires to heighten an alertness degree of the user, performing an air conditioning operation to maintain a first standard temperature and a range of a temperature variation corresponding thereto to enhance the user's alertness degree, performing an air conditioning operation to maintain a second standard temperature and the range of the temperature variation corresponding thereto when the user feels cold at the first standard temperature, and to maintain a third standard temperature and the range of the temperature variation corresponding thereto when the user feels hot at the first standard temperature, repeating the second step when the user feels cold at the third standard temperature, and when the user feels hot at the second standard temperature, and performing an air conditioning oper
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: June 30, 1998
    Assignee: LG Electronics
    Inventors: Ho Seon Choi, Dae-Keun Lee, See-Poong Seong, Deok Huh