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공주 축산폐수공공처리장에서의 바이오가스-마이크로터빈 분산발전시스템 개발
박정극(Park, Jung-Keuk),허광범(Hur, Kwang-Beom),이기철(Lee, Ki-Chul),강호(Kang, Ho),임상규(Rhim, Sang-Gyu) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.05
Korea Electric Power Corporation (KEPCO) has started the nation's first biogas-microturbine project in the city of Gongju as an effort to encourage the utilization of wasted biogas containing useful energy source in the form of CH₄. The goal of the project is to set up the biogas microturbine co-generation system for utilizing biogas as an energy source and improving the economics of the wastewater treatment plant. Wastewater treatment processes were investigated in depth to find improvement possibility. Changes in internal recirculation ratio and pre-treatment degree are needed to optimize plant operation and biogas production. Biogas pre-treatment system satisfies Capstone's fuel condition requirement with the test result of 99.9% and 90.2% of hydrogen sulphide and ammonia is removal performance. Installation of microturbine and manufacture of heat exchanger to warm anaerobic digester has been done successfully. Expected economic profit produced by the system is coming from energy saving including electricity 115,871kWh/year and heat contained in exhaust gas 579GJ/year.
매립가스 마이크로가스터빈 배가스 분석에 관한 실험적 연구
박정극(Park, Jung-Keuk),허광범(Hur, Kwang-Beom),임상규(Rhim, Sang-Gyu),오일홍(Oh, Il-Hong),이인화(Lee, In-Hwa) 한국신재생에너지학회 2011 신재생에너지 Vol.7 No.3
MGT fuelled by landfill gas was tested to asses feasibility of its exhaust gas application for CO₂ enrichment. The exhaust gas was analyzed during start-up and normal operation with different MGT load conditions. Due to the changes of air/fuel ratio and combustion mode, O₂, CO₂, CO and NOx concentration were varied within wide ranges during the MGT start-up. Especially, NOx emissioin level was increased up to 20.01 ppmv. Different tendencies of O₂, CO₂, CO and NOx concentrations were observed with MGT output changes. O₂ and CO concentrations were shown to be decreased and NOx and CO₂ concentrations were shown to have opposite trends. NOx emission level (0.8~1.88 ppmv) was very low compared to other types of combustion based power generation equipment. Unburned hydrocarbon emission level was substantially decreased with MGT load increase. Especially, C₂H₄ concentration was below the detection limit(0.2 ppmv) around the nominal load condition. The exhaust gas from landfill gas fuelled MGT system was shown to be feasible for CO₂ fertilization. Concentrations of major components were within or below the maximum allowable ranges.
60㎾급 마이크로가스터빈 배가스 구동 흡수식 냉/온수발생기의 성능특성 연구
박정극(Jung-keuk Park),임상규(Sang-Kyu Rhim),허광범(Kwang-Beom Hur) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Micro gas turbine(MGT) is expected to become widespread in a wide range of applications, including residential and small-scale industrial use. Aforementioned MGT's advantages can be even stronger when MGT consists of MGT-absorption chiller/heater system which produces simultaneously mechanical power (electricity) and heat or cooling from a single fuel. The exhaust heat emitted by the MGT is in the form of about 300 clean exhaust gas. The exhaust gas is suitable for absorption chiller/heater system. Korea Electric Power Corporation (KEPCO) has researched performance characteristcis of the 60kW class MGT-absorption chiller-heater system in the local condition. Variations of heat recovery from exhaust gas has measured according to micro gas turbine output of 15, 30, 45, 60㎾. From those results, the performance of the MGT-absorption chiller/heater system has been evaluated.
농작물의 CO<sub>2</sub> 고정화 연계 LFG-MGT 시스템의 타당성 연구
박정극(Park, Jung-Keuk),허광범(Hur, Kwang-Beom),임상규(Rhim, Sang-Gyu) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
LFG-MGT CHP system development project with CO₂ enrichment in greenhouses was introduced. LFG is produced from the anaerobic digestion of landfilled waste and it has been utilized for power/heat generation since it contains around 50% of CH₄. Utilization of LFG from small scale landfill is also needed as well as large scale landfill. However, due to economy of scale, it is very difficult to develop business model. In this context, combining CHP system with greenhouses is considered as feasible option for LFG utilization. LFG-MGT CHP system with CO₂ fixation in greenhouses has been derived as an active greenhouse gas reduction strategy, The focus of the system is beyond carbon neutral LFG utilization to neutral carbon absorption. The system is feasible in terms of direct and indirect CO₂ emission reduction with more economical way.
소규모 매립가스 자원화를 위한 마이크로터빈 열병합발전 및 유리온실 CO₂ 농도 증가 시스템의 타당성 연구
박정극(Park, Jung-Keuk),허광범(Hur, Kwang-Beom),임상규(Rhim, Sang-Gyu),이인화(Lee, In-Hwa) 한국신재생에너지학회 2009 신재생에너지 Vol.5 No.2
As new small scale LFG (landfill gas) energy project model which can improve economic feasibility limited due to the economy of scale, LFG-Microturbine combined heat and power system with CO₂ fertilization into greenhouses was proposed and investigated including basic design process prior to the system installation at Gwang-ju metro sanitary landfill. The system features CH₄ enrichment for stable microturbine operation, reduction of compressor power consumption and low CO emission, and CO₂ supplement into greenhouse for enhancement plant growth. From many other researches, high CO₂ concentration was found to enhance CO₂ assimilation (also known as photosynthesis reaction) which converts CO₂ and H₂O to sugar using light energy. For small scale landfills which produce LFG under 3;m³/min, among currently available prime movers, microturbine is the most suitable power generation system and its low electric efficiency can be improved with heat recovery. Besides, since its exhaust gas contains very low level of harmful contaminants to plant growth such as NOx, CO and SOx, microturbine exhaust gas is a suitable and economically advantageous CO₂ source for CO₂ fertilization in greenhouse. The LFG-Microturbine combined heat and power generation system with CO₂ fertilization into greenhouse gas to enhance plant growth is technologically and economically feasible and improves economical feasibility compared to other small scale LFG energy project model.
허광범(Hur, Kwang-Beom),박정극(Park, Jung-Keuk),이정빈(Lee, Jung-Bin),임상규(Rhim, Sang-Gyu),김재훈(Kim, Jae-Hoon) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06
As the distributed generation becomes more reliable and economically feasible, it is expected that a higher application of the distributed generation units would be interconnected to the existing grids. This new generation technology is linked to a large number of factors like economics and performance, safety and reliability, market regulations, environmental issues, or grid connection constrains. KEPCO (Korea Electric Power Corporation) is performing the project to develope the Distributed Micro Gas Turbine (MGT) technolgies by using Swine BIO-ENERGY. This paper describes the plans and strategies for the renewable energy of MGT on actual grid-connection under Korean situations. KEPCO also, has a research plan on bio-gas pretreatment system applicable to our domestic swine renewable resources and is performing concept design of pilot plant to test grid operation. In addition, this testing will be conducted in order to respond to a wide variety of needs for application and economic evaluation in the field of On-site generation.
허광범(Hur, Kwang-Beom),박정극(Park, Jung-Keuk),임상규(Rhim, Sang-Gyu),김재훈(Kim, Jae-Hoon) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.05
As the distributed generation becomes more reliable and economically feasible, it is expected that a higher application of the distributed generation units would be interconnected to the existing grids. In this context, the Micro Gas Turbines (MGT) by using Bio-gas is being considered as a promising solution. In order to propose a feasible concept of those technologies such as improving environmental effect and economics, we performed a sensitivity study for a biomass fueled MGT using a simulation model. The study consists of 1) the fundamental modeling using manufacturer's technical specifications, 2) the correction with the experimental data, and 3) the prediction of off-design characteristics. The performance analysis model was developed by PEPSE-GT 72, commercial steam/gas turbine simulation technicque.
허광범(Hur, Kwang-Beom),박정극(Park, Jung-Keuk),이정빈(Lee, Jung-Bin),임상규(Rhim, Sang-Gyu) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
Bio energy development by using Low Calorific Gas Turbine(LCGT) has been developed for New & Renewable energy source for next generation power system, low fuel and operating cost method by using the renewable energy source in landfill gas (LFG), Food Waste, water waste and Livestock biogas. Low calorific fuel purification by pretreatment system and carbon dioxide fixation by green house system are very important design target for evaluate optimum applications for bio energy. Main problems and accidents of Low Calorific Gas Turbine system was derived from bio fuel condition such as hydro sulfide concentration, siloxane level, moisture concentration and so on. Even if the quality of the bio fuel is not better than natural gas, LCGT system has the various fuel range and environmental friendly power system. The mechanical characterisitics of LCGT system is a high total efficiency (>70%), wide range of output power (30kW - 30MW class) and very clean emmission from power system (low NOx). Also, we can use co-generation system. A green house designed for four different carbon dioxide concentration from ambient air to 2000 ppm by utilizing the exhaust gas and hot water from LCGT system. We look forward to contribute the policy for Renewable Portfolio Standards(RPS) by using LCGT power system.
Low Calorific Gasturbine 매립지 적용 및 유리온실 운용기술 설계
허광범(Hur, Kwang-Beom),박정극(Park, Jung-Keuk),이정빈(Lee, Jung-Bin),임상규(Rhim, Sang-Gyu) 한국신재생에너지학회 2010 신재생에너지 Vol.6 No.2
Low Calorific Gas Turbine (LCGT) has been developed as a next generation power system using landfill gas (LFG) and biogas made from various organic wastes, food Waste, waste water and Livestock biogas. Low calorific fuel purification by pretreatment system and carbon dioxide fixation by green house system are very important design target for the optimum applications of LCGT. Main troubles of Low Calorific Gas Turbine system was derived from the impurities such as hydro sulfide, siloxane, water contained in biogas. Even if the quality of the bio fuel is not better than natural gas, LCGT may take low quality gas fuel and environmental friendly power system. The mechanical characterisitics of LCGT system is a high energy efficiency (>70%), wide range of output power (30 kW - 30 MW class) and very clean emission from power system (low NOx). A green house has been designed for four different carbon dioxide concentration from ambient air to 2000 ppm by utilizing the exhaust gas and hot water from LCGT system. LCGT is expected to contribute achieving the target of Renewable Portfolio Standards (RPS).