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Kang, Kyoung Ho; Youn, Young Jung; Park, Jong Kuk; Choo, Yeon Jun; Chun, Se Young; Song, Chul Hwa
Proceedings of the KSME 2008 fall annual meeting2008
Proceedings of the KSME 2008 fall annual meeting2008
AbstractAbstract
[en] A series of experiments have been performed in a vertical tube of 9.4 mm inner diameter using the Freon, HFC-134a as working fluid medium under the supercritical pressure range. Two kinds of experiments, i.e. steady-state and pressure transient, have been carried out. As for the steady-state heat transfer experiment, the mass flux was in the range between 600 and 2000 kg/m2s and the maximum heat flux was 160 kW/m2. The selected pressures were 4.1, 4.3 and 4.5 MPa which correspond to 1.01, 1.06 and 1.11 times the critical pressure, respectively. In the pressure transient experiments, the inlet pressures were varied from 3.8 to 4.5 MPa and vice versa in the pressure transient simulations. In this study, heat transfer correlation and criterion for the heat transfer deterioration are suggested under the supercritical pressures. And also heat transfer characteristics during the pressure transient are examined
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Source
The Korean Society of Mechanical Engineers, Seoul (Korea, Republic of); [2 CD-ROMS]; 2008; p. 2242-2247; KSME 2008 fall annual meeting; Pyeongchang (Korea, Republic of); 5-7 Nov 2008; Available from KSME, Seoul (KR); 4 refs, 10 figs, 2 tabs
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Miscellaneous
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AbstractAbstract
[en] Ions produced by crossed-beam collisions of pulsed monoenergetic electrons and supersonic expansion molecules have been analysed by time-of-flight mass spectroscopy (TOF-MS) in order to determine the appearance potentials, absolute total, dissociative and parent ionization cross sections and nascent ion kinetic energy distributions. The electron impact study was conducted at incident electron energies up to 100 eV on the parent CH2F2 molecule (and Ar/CH2F2 mixtures), a fluoromethane where the CH2F+ ion is produced at higher yields (1:18) than the parent molecule ion, CH2F2+. TOF-MS band profiles analysis has enabled us to determine the ions' nascent kinetic energy distributions, information that combined with the dissociative ionization appearance potentials, calculated molecular orbital energies and orbital bond characters, leads to improved identification of the electron impact dissociative channels. (author)
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Country of input: International Atomic Energy Agency (IAEA); 43 refs.; E-mail: qfpcaalf at lg.ehu.es; This record replaces 31050741
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Journal Article
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Journal of Physics. B, Atomic, Molecular and Optical Physics (Online); ISSN 1361-6455;
; v. 33(18); p. 3615-3630

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AbstractAbstract
[en] To understand heat transfer mechanism from general character and make clear the difference caused by properties, experiments of heat transfer to water and Freon R134a flowing upward in vertical tubes were conducted on SWAMUP and SMOTH test facilities, respectively. The variations of heat transfer coefficients of water and Freon with dimensionless temperature are coincident in the case of normal heat transfer, heat transfer enhancement and heat transfer deterioration due to buoyancy force and acceleration effect. The HTC ratio decreases with the increase of dimensionless parameter πB. The HTC ratio increases first and then decreases with the increase of dimensionless parameters πA. The dimensionless parameters πB and πA show better relevance on the supercritical water and Freon experimental data, respectively. The investigation of the heat transfer behavior of supercritical water in the SCWRs by means of model fluid Freon R134a is proved reasonable and feasible because of the similarity dependence on dimensionless parameters. (authors)
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7 figs., 2 tabs., 10 refs.; http://dx.doi.org/10.7538/yzk.2016.50.08.1395
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Journal Article
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Atomic Energy Science and Technology; ISSN 1000-6931;
; v. 50(8); p. 1395-1401

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AbstractAbstract
[en] Experiments on Critical Heat Flux (CHF) of Freon-12 have been carried out in the rectangular vertical channels with gap sizes of 1 mm, 2 mm, and 3 mm, respectively. Analysis of CHF data in the different channels shows that CHF decreases as the increase of pressure, and while the exit quality rises, CHF falls down quickly. Meanwhile, CHF goes up as the mass velocity increases when the exit quality is lower, and contrarily, when the exit quality is higher, the increase of mass velocity results in the decrease of CHF. According to the analysis results, a conclusion can be drawn that gap sizes almost have no effect on the CHF in rectangular channels with gaps from 1 mm to 3 mm under the same condition in the experiment. (authors)
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7 figs., 1 tabs., 3 refs.
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Journal Article
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Nuclear Power Engineering; ISSN 0258-0926;
; v. 33(3); p. 42-45

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AbstractAbstract
[en] Initial energy audit has been conducted in the framework of energy saving program in PSTBM - BATAN, from the result of initial energy audit of electric energy consumption one month is worth 41.871.27 kWh. With the target of Energy Consumption Intensity of PSTBM Building obtained at 13.56 kWh/m2, the achievement target of IKE is categorized as efficient (8.5 - 14 kWh/m2) pursuant to Regulation of Minister of Energy and Mineral Resources, 13 in 2012, and quite efficient (12.08 - 14.58 kWh/m2) based on IKE Criteria Standard building based on the Ministry of National Education Year 2004. The initial energy audit was conducted in February 2017 by collecting historical data and then conducting a direct energy audit on all buildings in PSTBM. After completion, the data obtained were analyzed and then it was concluded that 40 buildings consumed most electricity at 29,990.78 kWh/month or about 73 %, and 41 buildings consumed at least 586.85 kWh/month or about 1 %. Electrical cooling from air conditioners is 74 % of most sectors in total, it is necessary to modify the cooling room with the latest AC technology using R410 type freon gas. The recommendation of this initial energy audit program is to carry out a detailed energy audit that will produce energy saving recommendations electricity. (author)
Original Title
Studi awal audit energi pada gedung Pusat Sains Teknologi Bahan Maju - Badan Tenaga Nuklir Nasional
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Budi Setiawan; Aisyah (Center for Radioactive Waste Technology, National Nuclear Energy Agency, Serpong (Indonesia)) (eds.); Sigit Santoso (ed.) (Center for Nuclear Reactor Technology and Safety, National Nuclear Energy Agency, Serpong (Indonesia)); Heny Suseno (ed.) (Center for Radiation Safety Technology and Metrology, National Nuclear Energy Agency, Jakarta (Indonesia)); Djoko Hari Nugroho (ed.) (Nuclear Energy Regulatory Agency, Jakarta (Indonesia)); Mohammad Hasroel Thayeb; Hayati Sari Hasibuan (University of Indonesia, Depok (Indonesia)) (eds.); Center for Radioactive Waste Technology, National Nuclear Energy Agency, Serpong (Indonesia); 293 p; ISSN 1410-6086;
; Nov 2017; p. 267-276; Innovative, reliable and sustainable waste management as a form of concern for the environment; Pengelolaan limbah yang inovatif, handal dan berkelanjutan sebagai wujud kepedulian terhadap lingkungan; Depok (Indonesia); 26 Sep 2017; Also available from Center for Utilization of Informatics and Region Strategic Nuclear, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560895, Serpong, Tangerang Selatan 15314 (ID); 10 refs.; 7 tabs.; 6 figs.

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AbstractAbstract
[en] A novel method of measuring the rate of nucleation of superheated drops and also the lifetime of metastable superheated drops accurately has been developed. The lifetime of superheated drops of Freon-12 has been determined by measuring the time dependence of the volume of vapour formed due to spontaneous nucleation of the drops using a relative water manometer. The time dependence of the nucleated volume of vapour indicates the presence of two lifetimes of decay of superheated droplets by spontaneous nucleation
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S1350448798000353; Copyright (c) 1997 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Filin, S A; Rogalin, V E; Kaplunov, I A, E-mail: Kaplunov.IA@tver.su2019
AbstractAbstract
[en] Metal optics is actively used in IR optics, which makes it necessary to clean it from dust and other operational contaminants. This increases the life of these notably expensive products. Usually their mechanical wiping is excluded, since it leads to the appearance of scratches and other defects on the surface, markedly increasing the scattering of radiation. Methods for the selection of solvents have been analyzed and experiments have been carried out that make it possible to accept efficient their use in the purification of metal optics from contaminations. Contaminations have different physicochemical properties and are present, as a rule, together on the surface of metal optics (taking into account the corrosion properties of the latter). Solvent compositions based on azeotrope mixes with freon-114B2, having a solubility parameter (δ) corresponding or close to the solubility parameter (δ) of the main (by weight) contamination or a mixture of contaminants which are present on the optical surface, were used. (paper)
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International Scientific and Practical Conference on Mathematical Modeling, Programming and Applied Mathematics; Veliky Novgorod (Russian Federation); 27-28 Jun 2019; Available from http://dx.doi.org/10.1088/1742-6596/1352/1/012019; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Literature Type
Conference
Journal
Journal of Physics. Conference Series (Online); ISSN 1742-6596;
; v. 1352(1); [7 p.]

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Egorov, A.V.; Zezin, A.A.; Fel'dman, V.I.
3. Bakh conference on radiation chemistry. Abstracts of reports2000
3. Bakh conference on radiation chemistry. Abstracts of reports2000
AbstractAbstract
No abstract available
Original Title
Konformatsionnye ehffekty v protsessakh perenosa dyrki mezhdu molekulami alkilbenzolov v zamorozhennykh matritsakh
Primary Subject
Source
Rossijskaya Akad. Nauk, Nauchnyj Sovet RAN po Khimicheskoj Fizike, Moscow (Russian Federation); Inst. Ehlektrokhimii RAN im A.N. Frumkina, Moscow (Russian Federation); MGU im. M.V. Lomonosova, Khimicheskij Fakul'tet, Moscow (Russian Federation); Assotsiatsiya Delovogo Sotrudnichestva Radtekh-Evraziya, Moscow (Russian Federation); 110 p; 2000; p. 28; 3. Bakh conference on radiation chemistry; 3. Bakhovskaya konferentsiya po radiatsionnoj khimii; Moscow (Russian Federation); 5-7 Jun 2000
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Michael G. Waddell; William J. Domoracki; Tom J. Temples
National Energy Technology Lab., Pittsburgh, PA (United States); National Energy Technology Lab., Morgantown, WV (United States). Funding organisation: US Department of Energy (United States)2001
National Energy Technology Lab., Pittsburgh, PA (United States); National Energy Technology Lab., Morgantown, WV (United States). Funding organisation: US Department of Energy (United States)2001
AbstractAbstract
[en] This annual technical progress report is for part of Task 4 (site evaluation), Task 5 (2D seismic design, acquisition, and processing), and Task 6 (2D seismic reflection, interpretation, and AVO analysis) on DOE contact number DE-AR26-98FT40369. The project had planned one additional deployment to another site other than Savannah River Site (SRS) or DOE Hanford Site. After the SUBCON midyear review in Albuquerque, NM, it was decided that two additional deployments would be performed. The first deployment is to test the feasibility of using non-invasive seismic reflection and AVO analysis as a monitoring tool to assist in determining the effectiveness of Dynamic Underground Stripping (DUS) in removal of DNAPL. The second deployment is to the Department of Defense (DOD) Charleston Naval Weapons Station Solid Waste Management Unit 12 (SWMU-12), Charleston, SC to further test the technique to detect high concentrations of DNAPL. The Charleston Naval Weapons Station SWMU-12 site was selected in consultation with National Energy Technology Laboratory (NETL) and DOD Naval Facilities Engineering Command Southern Division (NAVFAC) personnel. Based upon the review of existing data and due to the shallow target depth, the project team collected three Vertical Seismic Profiles (VSP) and an experimental P-wave seismic reflection line. After preliminary data analysis of the VSP data and the experimental reflection line data, it was decided to proceed with Task 5 and Task 6. Three high resolution P-wave reflection profiles were collected with two objectives; (1) design the reflection survey to image a target depth of 20 feet below land surface to assist in determining the geologic controls on the DNAPL plume geometry, and (2) apply AVO analysis to the seismic data to locate the zone of high concentration of DNAPL. Based upon the results of the data processing and interpretation of the seismic data, the project team was able to map the channel that is controlling the DNAPL plume geometry. The AVO analysis located a major amplitude anomaly, which was tested using a Geoprobe(trademark) direct push system. The Geoprobe(trademark) was equipped with a membrane interface probe (MIP) that was interfaced with a sorbent trap/gas chromatograph (GC) system. Both the Photo Ionization Detector (PID) and Electron Capture Detector (ECD) on the GC exceeded the maximum measurement values through the anomaly. A well was installed to collect a water sample. The concentration of chlorinated solvents in the water sample was in excess of 500 ppm. Other amplitude anomalies located directly under an asphalt road were also tested. Both the PID and ECD were zero. It appears that editing of poor quality near-offset traces during data processing caused these anomalies. Not having the full range of source to receiver offset traces in those areas resulted in a false anomaly during AVO analysis. This phenomenon was also observed at the beginning and end of each seismic profile also for the same reason. Based upon the water samples and MIP probes, it appears that surface seismic and AVO analysis were able to detect the area of highest concentration of DNAPL
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1 Dec 2001; 66 p; AC26-98FT40369; Available from OSTI as DE00791064
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Report
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AbstractAbstract
[en] CHF experiment is carried out in φ20x2.5 tube on the Freon-12 thermal hydraulic facility in order to assess the CHF Fluid-to-fluid scaling technique. Based on different databases, the compensated distortion model of Ahmad, Lu Zhongqi model, Groeneveld model and the empirical scaling model of Stevens-Kirby are compared on the aspect of predication precision and applicable range. It is the fundament for the experimental study of CHF Fluid-to-fluid scaling technique in complex channel
Original Title
The CHF is stated for Critical Heat Flux
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Journal Article
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Nuclear Power Engineering; ISSN 0258-0926;
; v. 24(4); p. 354-358

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