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公开(公告)号：KR1020110047430A
公开(公告)日：2011-05-09
申请号：KR1020090104054
申请日：2009-10-30
Applicant: 한국전력공사
IPC: C10M177/00 , C10M125/04 , C10M101/00 , C10N30/06
CPC classification number: C10M177/00 , B82Y30/00 , C10M101/02 , C10M101/04 , C10M125/04
Abstract: PURPOSE: Lubricating oil for metallic nanopowder is provided to secure the excellent dispersion stability and oxidation resistance of the metallic nanopowder by directly dispersing the metallic nanopowder inside the lubricating oil. CONSTITUTION: Lubricating oil for metallic nanopowder is produced by a step of producing a mixed solution, a step of synthesizing lubricating base oil, a step of separating the lubricating base oil, and a step of removing the moisture. The mixed solution producing process is performed by mixing a metal aqueous solution and a dispersing agent with the lubricating base oil. The synthesizing process is performed by adding a reducing agent to the mixed solution for reducing metallic ions.
Abstract translation: 目的：提供金属纳米粉末的润滑油，通过将金属纳米粉末直接分散在润滑油内，确保金属纳米粉末的优异的分散稳定性和抗氧化性。 构成：用于金属纳米粉末的润滑油是通过生产混合溶液的步骤，合成润滑油基础油的步骤，分离润滑油基础油的步骤和除去水分的步骤来生产的。 混合溶液的制造方法是通过将金属水溶液和分散剂与润滑油基础油混合而进行的。 合成过程是通过向用于还原金属离子的混合溶液中加入还原剂进行的。
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公开(公告)号：KR1020110001772A
公开(公告)日：2011-01-06
申请号：KR1020090059460
申请日：2009-06-30
Applicant: 한국전력공사
Abstract: PURPOSE: An apparatus and a method for measuring a convective heat-transfer coefficient of nano-fluid are provided to save time and cost to be consumed for manufacturing sample since the moving speed of a heat-ray sensor in the fluid is accurately controlled. CONSTITUTION: An apparatus(100) for measuring a convective heat-transfer coefficient of nano-fluid comprises a sensor unit(110), a transfer unit(120) and a liquid container(130). The transfer unit is formed on the upper side of the sensor unit. The transfer unit makes the sensor unit reciprocate in a longitudinal direction in a state of being separated from the ground surface. The liquid container is located in a state of being separated from the lower part of the sensor unit. The liquid container holds nano-fluid or basic fluid for measuring a convective heat-transfer coefficient. The sensor unit comprises a cylindrical heat-ray sensor, which is formed from metallic heat-ray.
Abstract translation: 目的：提供一种用于测量纳米流体的对流传热系数的装置和方法，以节省制造样品所消耗的时间和成本，因为流体中热射线传感器的移动速度被精确控制。 构成：用于测量纳米流体的对流传热系数的装置（100）包括传感器单元（110），传送单元（120）和液体容器（130）。 传送单元形成在传感器单元的上侧。 传送单元使得传感器单元在与地面分离的状态下沿纵向往复运动。 液体容器位于与传感器单元的下部分离的状态。 液体容器容纳用于测量对流传热系数的纳米流体或碱性流体。 传感器单元包括由金属热射线形成的圆柱形热射线传感器。
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公开(公告)号：KR100913944B1
公开(公告)日：2009-08-25
申请号：KR1020070098514
申请日：2007-09-29
Applicant: 한국전력공사
IPC: C10M125/04 , C10M169/04 , B82Y30/00
Abstract: 본 발명은 고효율의 나노윤활유에 관한 것으로서, 더욱 상세하게는 금속 및 탄소 계열 재료의 나노 입자를 포함하는 고효율 나노윤활유에 관한 것이다. 본 발명의 나노윤활유에 포함되는 나노 입자는 열전도도와 분산성이 우수한 금, 은, 구리, 알루미늄, 니켈 등의 금속 및 이들의 합금, 금, 은, 구리, 알루미늄, 니켈 등의 금속 및 이들의 합금과 탄소로 이루어진 복합 입자, 풀러렌(Fullerene), 그래파이트(Graphite), CNT(Carbon nanotube, 탄소나노튜브), MWCNT(Multi-wall Carbon nanotube, 다층탄소나노튜브), 카본블랙(Carbonblack) 등의 탄소 계열 재료, CNT에 금, 은, 구리, 알루미늄, 니켈 및 이들의 합금으로 이루어진 금속 입자가 끼워져 있는 형태의 복합체로 이루어진 군으로부터 선택된 1종 이상인 것으로 입경이 1nm 내지 100 nm 정도의 나노 입자인 것을 특징으로 한다.
본 발명의 나노윤활유는 나노 입자의 응집체를 액상 용매에 분산시킨 뒤 비드밀, 고압균질기 및 초음파분산기 등을 이용하여 습식 분쇄함과 동시에 친유성 표면개질을 한 후, 초미세 한외여과막을 이용하여 과잉의 분산제와 물 등을 제거하고 마지막으로 진공농축기를 이용하여 액상 용매를 특정 오일로 치환함으로써 제조될 수 있다.
본 발명의 나노윤활유는 윤활유의 열전도도가 향상시키고, 마찰계수를 저감시키는데 효과적인 윤활특성 및 냉각특성이 향상된 고효율의 나노윤활유를 제공한다.
나노유체, 열전도도, 표면개질, 분산, 한외여과막, 진공농축, 윤활유-
公开(公告)号：KR1020080038625A
公开(公告)日：2008-05-07
申请号：KR1020060105762
申请日：2006-10-30
Applicant: 한국전력공사
CPC classification number: C10M125/00 , B01F3/1207 , B82Y40/00 , C10M171/06
Abstract: An oil-based nanofluid is provided to improve the energy efficiency, service life, and reliability of a potential transformer by increasing heat transfer characteristics of an insulating oil by 10% or more. A method for preparing an oil-based nanofluid includes the steps of: dispersing a metal, non-metal or ceramic-based nano powder aggregate in a liquid solvent and performing wet grinding; performing a lipophilic surface modification of the nano powder; removing superfluous dispersant and water using ultrafiltration membranes; and replacing the liquid solvent with a predetermined oil using a vacuum evaporator. The oil-based nanofluid is obtained by dispersing 0.01-5 vol% of the metal, non-metal, or ceramic-based nano powder in oil, wherein the nano powder has a diameter of 1-100 nm.
Abstract translation: 提供了一种油性纳米流体，通过增加绝缘油的传热特性提高10％以上，提高了电压互感器的能源效率，使用寿命和可靠性。 制备油性纳米流体的方法包括以下步骤：将金属，非金属或陶瓷基纳米粉末骨料分散在液体溶剂中并进行湿磨; 进行纳米粉末的亲油表面改性; 使用超滤膜除去多余的分散剂和水; 并使用真空蒸发器用预定的油代替液体溶剂。 通过将0.01-5体积％的金属，非金属或陶瓷基纳米粉末分散在油中而得到，其中纳米粉末的直径为1-100nm。
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