Abstract:
Nano-particles 1 of a metal or the like are dispersed in a liquid fluid 2. Thereby, the reactivity or toxicity of the liquid fluid can be reduced when the liquid fluid has reactivity or toxicity. The flow resistance of the liquid fluid can be raised, and the leakage of the liquid fluid from minute cracks can be reduced. By using the liquid fluid as a heat transfer medium of a heat exchanger, the heat transfer performance equivalent to or higher than the heat transfer performance of the original heat exchanger can be obtained.
Abstract:
An electromagnetic flowmeter designed to use a smaller excitation device and applicable to measurement on tubular channels of various sectional shapes. The electromagnetic flowmeter includes an excitation device for forming a magnetic field perpendicular to an outer wall of a tubular channel, and a pair of electrodes for measuring an electromotive force generated by the movement of the electroconductive fluid across the magnetic field. The electrodes and two magnetic poles of the excitation device are collectively placed on the outer wall at one side of the tubular channel.
Abstract:
An object of the present invention is to efficiently produce ultrafine particles having such a small diameter as 50 nm or less, a narrow range of size distribution, and a non-oxidation surface. According to the present invention, the metallic ultrafine particles are produced by dropping a raw metallic powder onto a controllably heated evaporating surface in a decompressed inert gas; instantly evaporating the raw metallic powder to form the ultrafine particle; and condensing and depositing the ultrafine particle on a trapping surface arranged above the evaporating surface. The raw metallic powder is any one of a single metal, an alloy and an intermetallic compound, preferably has an average particle diameter controlled to 500 μm or smaller so that the powder can be instantly evaporated, and is preferably supplied by a minute amount.
Abstract:
A heat exchanger having an intermediate heating medium has a shell of the heat exchanger, a plurality of cylindrical partition tubes each of which has an annular space therein and is closed at both end portions thereof with annular walls, the cylindrical partition tubes being arranged concentrically in a mutually spaced manner in the shell, and helical coil-shaped heat exchanger tubes each of which is disposed in the annular space in the cylindrical partition tube. A high-temperature heating medium flows in the shell through clearances among the helically arranged multiple cylindrical partition tubes, a low-temperature heating medium flows in each of the helical coil-shaped heat exchanger tubes, and an intermediate heating medium chemically inactive with respect to both the high-temperature heating medium and the low-temperature heating medium and excellent in the heat transferring performance is passed through each of the annular spaces in the cylindrical partition tubes.
Abstract:
Suppression or enhancement of various properties of a liquid fluid is aimed by improving uniform dispersion of nanoparticles by means of making a state in which no oxidized film exists on the surfaces of the nanoparticles to be dispersed in the liquid fluid. The location of the liquid fluid is confirmed with ease by enhancing the brightness of light emission of the fluid through uniform dispersion of the nanoparticles in the liquid fluid containing a material having a flame reaction. In this way, as to liquid fluids utilized in various industries, it is possible to offer a technology to desirably enhance or suppress a property desired to be enhanced and a property desired to be suppressed among various properties that its constituents have.
Abstract:
The present invention relates to maintaining the fundamental physical properties of a liquid alkali metal with dispersed nanoparticles which is such that nanoparticles are uniformly dispersed and mixed in a liquid alkali metal used in heat exchange, cooling and other applications, and suppressing the reaction of the liquid alkali metal with dispersed nanoparticles. Provided is a method of manufacturing a liquid alkali metal with dispersed nanoparticles by dispersing nanoparticles in a liquid alkali metal. In this method, the nanoparticles are made of a metal having a large atomic bonding due to a combination with the liquid alkali metal compared to the atomic bonding of atoms of the liquid alkali metal and a metal having a large amount of charge transfer is used in the nanoparticles. The liquid alkali metal is selected from sodium, lithium and sodium-potassium alloys, and the nanoparticles to be dispersed are made of transition metals, such as titanium, vanadium, chromium, iron, cobalt, nickel and copper.
Abstract:
Suppression or enhancement of various properties of a liquid fluid is aimed by improving uniform dispersion of nanoparticles by means of making a state in which no oxidized film exists on the surfaces of the nanoparticles to be dispersed in the liquid fluid. The location of the liquid fluid is confirmed with ease by enhancing the brightness of light emission of the fluid through uniform dispersion of the nanoparticles in the liquid fluid containing a material having a flame reaction. In this way, as to liquid fluids utilized in various industries, it is possible to offer a technology to desirably enhance or suppress a property desired to be enhanced and a property desired to be suppressed among various properties that its constituents have.
Abstract:
An object of the present invention is to efficiently produce ultrafine particles having such a small diameter as 50 nm or less, a narrow range of size distribution, and a non-oxidation surface. According to the present invention, the metallic ultrafine particles are produced by dropping a raw metallic powder onto a controllably heated evaporating surface in a decompressed inert gas; instantly evaporating the raw metallic powder to form the ultrafine particle; and condensing and depositing the ultrafine particle on a trapping surface arranged above the evaporating surface. The raw metallic powder is any one of a single metal, an alloy and an intermetallic compound, preferably has an average particle diameter controlled to 500 μm or smaller so that the powder can be instantly evaporated, and is preferably supplied by a minute amount.
Abstract:
Discriminating radioactive nuclides of a gamma ray source and nondestructively measuring an image concentration and spatial distribution of a gamma ray by radioactive nuclides. A visualizing apparatus having a container 1 including a gamma ray source 2; a gamma ray detector 7 around the container 1 which detects gamma rays through a collimator 6; a gamma ray detection signal processing device 9 which processes a gamma ray detection signal measuring energy and counted value thereof; an energy discrimination processing device 10 which performs discrimination and intensity analysis of radioactive nuclides by performing spectrum analysis of gamma ray energy and intensity measured for each unit time or position; an imaging calculation processing device 11 which forms images of concentration and space distribution of the gamma ray source for each discriminated radioactive nuclide; and an image display device 12 which performs visual display based on a result of the calculation processing.
Abstract:
To discriminate radioactive nuclides of a gamma ray source included in an apparatus and the like, and to nondestructively measure and image concentration and spatial distribution of gamma ray by radioactive nuclide. There is provided a visualizing apparatus comprising: a container 1 including a gamma ray source 2; a gamma ray detector 7 which is arranged around the container 1 and which detects gamma rays emitted from the gamma ray source through a collimator 6; a gamma ray detection signal processing device 9 which processes a detected gamma ray detection signal to measure energy and counted value of the signal; an energy discrimination processing device 10 which performs discrimination and intensity analysis of the radioactive nuclides by performing spectrum analysis of gamma ray energy and gamma ray intensity measured for each unit time or unit position; an imaging calculation processing device 11 which forms images of concentration and space distribution of the gamma ray source for each discriminated radioactive nuclide; and an image display device 12 which performs visual display on the basis of the result of the calculation processing.