Lee M.C.,Seoul National University |
Lee M.C.,Technology Commercialization Office |
Yoon Y.,Seoul National University
Fuel | Year: 2012
DME (dimethyl ether, CH 3OCH 3) is a potentially attractive fuel for gas turbines because of low pollutant emission and easy transportation and storage. However, the high flame speed and a low ignition temperature of DME present a high risk of flash-back, which can be a potentially serious problem. To solve this problem and achieve better combustion performance, the present study contrived a new fuel nozzle for DME that can obtain optimal combustion of DME in the gas turbine combustor, thereby achieving cost reduction of power generation, enhancement in reliability of power plants and diversification of usable fuel. The configuration of a fuel nozzle for DME and a design method using Wobbe Index are both described in detail. The combustion performance of the newly developed DME fuel nozzle was verified through a gas turbine combustion test and the results showed considerable improvement in the performance of NO x and CO emissions and the prevention of flash-back. © 2012 Elsevier Ltd. All rights reserved.
Technology Commercialization Office | Date: 2011-07-26
A system and method for visually displaying and analyzing public health data for geospatial and/or time variations, including the collection of symptom data coupled with geographic and time data, filtering the symptom data based upon a selected time period and geographic range, and creating a visual result based upon statistical modeling including power transform and/or data normalization. According to at least one embodiment, the system for visually displaying and analyzing includes selecting and performing at least one aberration detection method such as applying CUSUM analysis, quantile measures, and/or bootstrapping analysis, and displaying the result to a user via a visual analytics arrangement.
Technology Commercialization Office | Date: 2014-03-13
A hemostatic putty for treatment of a variety of wounds topographies, including but not limited to highly three dimensional wounds, for example gunshot wounds and impalements, is disclosed. The putty is comprised of a matrix polymer weakly crosslinked or not crosslinked such that a viscoelastic matrix is formed. The viscoelastic nature of the putty is tunable by the composition and enables the putty to conform to a variety of wound topographies. Likewise, a hemostatic polymer, for example chitosan or hydrophobically modified chitosan, is included in this matrix to impart hemostatic properties and tissue adhesive on the putty. The hemostatic polymers disclosed prevent microbial infection and are suitable for oxygen transfer required during normal wound metabolism.
Park S.H.,Institute for Advanced Engineering IAE |
Lee S.J.,Institute for Advanced Engineering IAE |
Lee J.W.,Institute for Advanced Engineering IAE |
Chun S.N.,Technology Commercialization Office |
Lee J.B.,Technology Commercialization Office
Energy | Year: 2015
Integrated Gasification Combined Cycle technology with Carbon Capture Storage has many potentialadvantages for future power generation system and many pre-combustion CO2 capture technologies have been developed for removing the acid gas and CO2 from the syngas. In this study, redesign and modeling of the two-stage pre-combustion CO2 capture process, using three different physical solvents, was conducted. The quantitative design modeling analysis was performed using the computational software ASPEN Plus®. The Selexol process was evaluated as the most efficient pre-combustion CO2 capture process from the points of electric/thermal energy consumption as a result of ASPEN Plus® modeling. The Selexol modeling process resulted in electric energy of about 3.2 MWe to maintain the operating temperature and pressure by using the pump, the compressor and the chiller. The consumption of thermal energy was also evaluated to be 0.85MWth for regeneration of the solvent in the H2S stripper. Concomitantly, various comparison and performance results were obtained by changing the key design modeling parameters; Water-Gas Shift conversion rate, operating temperature and CO2 capture rate were varied for their individual effects on energy consumption, solvent and hydrogen loss. As Water-Gas Shift conversion rate increased, the Selexol process consumes the least amount of electric energy among the modeled CO2 capture processes using the physical solvents. On the other hand, changing the operating temperature turned out to be advantageous for the Rectisol process over other CO2 capture processes using the physical solvents. The reboiler heat duty and hydrogen loss with total solvent flow rate can also be reduced by dropping the operating temperature. As CO2 capture rate increased, Selexol process was more efficient than other processes using the Methanol and NMP (NMethyl- 2-Pyrrolidone). This modeling result is explained by the decrease in the reboiler heat duty and electrical energy consumption although the solvent flow rate increased. © 2014 Elsevier Ltd. All rights reserved.
Technology Commercialization Office | Date: 2014-11-25
A formulation for coating surfaces, for example gloves, with a tacky film comprises a hydrophobically modified biopolymer, where the hydrophobic modifications of the biopolymer correspond to between 1 and 90% of available functional groups, a plasticizer, and a volatile solvent. The formulation quickly dries into a tacky film that provides an enhanced friction of the surface.