http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hydrothermal Synthesis of Fe Based MOFs with Energy Economy Approach
Israr, Farrukh,Kim, Duk Kyung,Kim, Yeongmin,Oh, Seung Jin,Ng, Kim Choon,Chun, Wongee The Korean Society for Energy 2015 에너지공학 Vol.24 No.2
The mesoporous metal organic framework structure Fe-BTC was successfully synthesized by hydrothermal process with noticeable yield. The synthesis operation was conducted at intermediate temperature and for shortened operation time as compared to conventional procedures. This process approach with reduced operating temperature and shortened operation time may open an opportunity window towards process economy with reduction in energy consumption. A simple mathematical approach of diffraction indexing using X-ray diffraction patterns of synthesized powder was employed to confirm its crystalline nature and to investigate its high temperature stability. The crystallite size was calculated by using Debye-Scherrer equation.
Cost effective and low energy consuming hydrothermal synthesis of Ni based MOF
Israr, Farrukh,Kim, Duk Kyung,Kim, Yeongmin,Oh, Seung Jin,Ng, Kim Choon,Chun, Wongee The Korean Society for Energy 2015 에너지공학 Vol.24 No.2
The mesoporous metal organic framework structure of Ni-BTC was successfully synthesized in a low temperature and short operation time via hydrothermal synthesis process. Such operational route virtuously consumed less electrical and thermal energy. It proved time saving along with acceptable product yield (38%). The product was characterized through FESEM, FT-IR, XRD and $N_2$ gas adsorption measurement. Hightemperature stability of synthesized MOF was gauged by diffraction indexing of XRD patterns of as synthesized and heat treated samples of MOFs. The mathematically calculated particle size of Ni-BTC was found to be 42nm.
저온 활용을 위한 실리카겔 흡착식 담수화시스템의 성능연구
현준호(Hyun, Jun-Ho),Farrukh israr,이윤준(Lee, Yoon-Joon),천원기(Chun, Won-Gee) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.6
This work introduces a simple one-reactor adsorption desalination system that harnesses low temperature heat sources (solar energy, waste heat), which has been experimentally studied to elicit the most suitable design parameters and operating conditions. The design process of the system was divided into three parts to reflect the operating principle of desalination technology with application of adsorption processes. First, the evaporator for the vaporization of saline water was designed, then the reactor for the adsorption and release of the steam, followed by the condenser for condensation of the fresh water. The specific water yield is measured experimentally with respect to the time while controlling parameters such as heat source temperatures, coolant temperatures, system switching and half-cycle operational times. The present system well demonstrates the applicability of silica gel in relation to adsorption technologies that utilize low temperature heat sources ranging from 60 to 80℃, such as solar energy and waste heat.
현준호(Hyun Jun-Ho),Farrukh israr,이윤준(Lee Yoon-Joon),천원기(Chun Won-Gee) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.3
The development of solar thermal energy used adsorption desalination technology have been examined as a viable option for supplying clean energy. In this study, the modelling of the main devices for solar thermal energy used and adsorption desalination system was introduced. Silica gel type adsorption desalination system is considered to be a promising low-temperature heat utilization system. The design is divided into three parts. First, the evaporator for the vaporization of the tap water is designed, and then the reactor for the adsorption and release of the steam is designed, followed by the condenser for the condensation of the fresh water is designed. In addition, new features based on the energy balance are also included to design absorption desalination system. In this basic research, One-bed(reactor) adsorption desalination plant that employ a low-temperature solar thermal energy was proposed and experimentally studied. The specific water yield is measured experimentally with respect to the time controlling parameters such as heat source temperatures, coolant temperatures, system switching and half-cycle operational times. Desalination is processes that permeate our daily lives, but It requires substantial energy input, powered either from electricity or from thermal input. From the environmental and sustainability perspecives, innovative thermodynamic cycles are needed to produce the above-mentioned useful effects at a lower specific energy input. This article describes the development of adsorption cycles for the production of desalting effects. We want that this adsorption system can be driven by low temperature heat sources at 60 to 80℃, such as renewable, solar thermal energy.
Optimization of Operational and Constitutional Geometric Parameters for Acoustic energy Output
Kuan Chen,Seung Jin Oh,Farrukh Israr,Sanket Kolhe,Sang Woong Shin,Wongee Chun 한국에너지기후변화학회 2013 에너지기후변화학회지 Vol.8 No.2
These days, much attention has been drawn to the conversion of low grade energy into any usable form of high grade energy, such as acoustic energy. Many efforts have been made in this regard as a means to abate carbon (CO2) emissions. This paper studied the effects of geometric parameters and varying input power on acoustic energy output. The acoustic laser kit (Garret 2000) was used for the construction of TA lasers. A series of sound pressure level measurements in different orientations did not differ significantly confirming that the sound wave generated could be assumed as a spherical wave. An increase in acoustic pressure was recorded with respective increase in input power, stack and resonator tube lengths owing to their relative influence over heat transfer rate and critical temperature gradient across the stack.