Kyungdong Navien Co. and Alantum Co. | Date: 2017-01-04
An object of the present disclosure is to provide a pre-mixed burner capable of preventing a backfire, improving flame stability, and responding to various combustion loads. To attain the object, the present disclosure is implemented by including a flame hole member made of a foam body which is made from a plurality of metal alloys through a sintering process and in which an air hole being a space between struts configuring a framework is formed, and configured to form a flame by allowing a mixed gas of gas and air to be sprayed through the air hole, a flame hole member fixing plate configured to fixedly couple the flame hole member to a burner main body, and a distributing plate provided in front of the flame hole member and at which a plurality of distributing holes are formed so as to uniformly supply the mixed gas to the flame hole member.
Research Institute Of Industrial Science & Technology and Alantum Corporation | Date: 2014-12-24
The present invention relates to a cathode current collector for a solid oxide fuel cell and, more particularly, to a cathode current collector inserted between a cell and a metal separator constituting a unit of a fuel cell stack, and a solid oxide fuel cell comprising the same.
Research Institute Of Industrial Science & Technology and Alantum Corporation | Date: 2016-11-02
The present invention relates to a cathode current collector for a solid oxide fuel cell and, more particularly, to a cathode current collector inserted between a cell and a metal separator constituting a unit of a fuel cell stack, and a solid oxide fuel cell including the same.
Choi K.,Korea University |
Kim J.,Korea University |
Ko A.,Korea University |
Myung C.-L.,Korea University |
And 2 more authors.
Journal of Aerosol Science | Year: 2013
The particulate emissions generated from a side-mounted 2.4L gasoline direct injection (GDI) engine were evaluated using a metal foam-type gasoline particulate filter (GPF), placed on the downstream of a three-way catalyst. An ULEV legislation-compliant light-duty vehicle was tested under the new European driving cycle (NEDC) and at constant-speed driving conditions. Particle number (PN) concentrations, particulate size distribution and the filtration efficiency of the GPF were evaluated with the condensation particle counter (CPC) and the differential mobility spectrometer (DMS). The PN emissions for the entire NEDC were 1.17E+12N/km for the base GDI vehicle and 4.99E+11N/km for the GPF-equipped GDI vehicle, and the filtration efficiency of the GPF was 57%. In particular, the number of sub-23nm particles formed in the GDI vehicle was substantially reduced, with 97% efficiency. The pressure drop in the metal foam-type GPF was constrained to be below 1.0kPa at a 120km/h vehicle speed, and as a result, the fuel economy and the CO2 emission for the GPF-applied vehicle were equivalent to those for the base vehicle. © 2012 Elsevier Ltd.
Liu Z.,ALANTUM Corporation |
Chun K.,Yonsei University |
Song S.,Yonsei University
SAE Technical Papers | Year: 2013
Soot particles accumulated in a DPF should be removed after a certain service time due to high pressure drop. The most common method is oxygen active regeneration which sometimes DPF cracking or melting. In this study, the authors aim to investigate the low temperature regeneration with hydrogen, which could prolong the DPF lifespan and facilitate CDPF regeneration efficiency. The DPF used in this research was coated with Pt/Al2O3 25g/ft 3 and all experiments were performed on engine test bench. Results showed that DPF regeneration can be realized at about 150°C or even lower. During regeneration, the inside temperature at front part (about 20mm) of DPF was about 40°C higher than the other parts during regeneration. The maximum inside temperatures during regeneration depend only on the hydrogen concentration and soot oxidation can be calculated simply from the Arrhenius equation using the experimental temperatures. Copyright © 2013 SAE International and Copyright © 2013 TSAE.
Park C.H.,Korea Institute of Materials Science |
Oh C.-S.,Korea Institute of Materials Science |
Kim S.,Korea Institute of Materials Science |
Kim S.,Alantum Corporation
Materials Science and Engineering A | Year: 2012
Uniaxial tensile properties influenced by the dynamic recrystallization (DRX) behavior of the partially strain-hardened magnesium AZ31 sheets (H24) containing scores of twins were investigated and compared to those of fully annealed ones (O) with absence of twins. For this purpose, a series of uniaxial tensile tests were carried out for the H24 and O materials at temperatures ranged from room temperature to 300°C and at strain rates between 10 -3 and 10 -1s -1. At 150 and 200°C, the H24 material exhibited higher yield strength without much loss in elongation compared to those of the O material; this trend was attributed to the continuous DRX along or around grain boundaries as well as extensive twin-aided DRX inside grains. In addition, the post-deformation hardness value of the H24 material showed higher than that of the O material. On the other hand, at higher temperatures of 250 and 300°C, it was observed that twins shown in the H24 material were disappeared even prior to deformation, resulting in the similar grain structure and mechanical property values to those of the O material, e.g., discontinuous DRX associated with grain boundary bulging. Finally, the initiation of DRX was rationalized in terms of microstructure morphology, deformation temperature and strain rate, and then modeled in the context of strain hardening rate analysis. A comparison of experimental results and predictions for both H24 and O materials showed that the model can provide a reasonable prediction of critical strain to initiate DRX. © 2012 Elsevier B.V.
Oh J.-S.,Andong National University |
Shim M.-C.,Andong National University |
Park M.-H.,Alantum Corporation |
Lee K.-A.,Andong National University
Metals and Materials International | Year: 2014
This study investigated the high temperature oxidation behavior of newly developed Ni-Cr-Al powder porous metal. High temperature isothermal oxidation tests were conducted at 900, 1000 and 1100 °C temperatures for 24 h under an atmosphere of 79% N2 + 21% O2 gas. Oxidation weight gain vs. time curves represented typical oxidation behavior of parabolic shape. Weight gain increased with increasing oxidation temperature. Ni-Cr-Al porous metal mainly created oxides such as α-Al203, Cr2O3, NiCr2O4. The α-Al203 oxide could be still maintained up to 1100 °C oxidation temperature as a thick and stable protective layer. It was noted that Ni-Cr-Al porous metal had better high temperature oxidation resistance than those of other Ni-based and Fe-based porous metals. The catastrophic degradation of oxidation resistance especially at very high temperature was not observed up to 1100 °C in this porous metal. The micro-mechanism of high temperature oxidation of Ni-Cr-Al porous metal was also discussed. © 2014, The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.
Alantum Co. | Date: 2016-12-21
An exemplary embodiment of the present invention provides an electrostatic metal porous body forming apparatus including: a transfer module transferring a porous body substrate; and a coating module coating a metal powder on the porous body substrate, wherein the transfer module includes a substrate supporter fixing the porous body substrate while the porous body substrate is transferred, and wherein the coating module includes: an electrifier including a first electrode electrifying the metal powder, a second electrode facing the first electrode, a first power supplier connected with the first electrode supplying electricity to the first electrode, and a second power supplier connected with the second electrode supplying electricity electrified with an opposite charge to a charge caused by the electrification of the first electrode to the second electrode, and generating a pulse type of voltage; and a metal powder supplier including a metal powder vessel storing the metal powder therein and supplying the metal powder to the outside, and an outlet separately disposed above or below the porous body substrate injecting the metal powder, and transferring or injecting the metal powder that is electrified and coated by the electrifier.
Alantum Corporation | Date: 2015-05-10
Alantum Corporation | Date: 2015-05-10
Particulate air filters for exhaust systems for internal conbustion engines.