• Title/Summary/Keyword: Bio-power

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Energy Harvesting from Bio-Organic Substance Using Microbial Fuel Cell and Power Conditioning System (미생물 연료 전지와 전력 조절 시스템을 이용한 생체 유기 물질로부터의 전력 생산)

  • Yeo, Jeongjin;Yang, Yoonseok
    • Journal of Biomedical Engineering Research
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    • v.38 no.5
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    • pp.242-247
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    • 2017
  • This study presents a bio-chemical energy harvesting system which can generate electric power from bioorganic substance contained in vermicompost. It produced electricity by inoculating microbial fuel cell(MFC) with earthworm-composted food waste. The generated electricity was converted into usable voltage level for mobile electronics through power conditioning circuits. The implemented prototype showed $200{\mu}W$ of maximum output electric power, which successfully supplied a beacon device which continuously transmitted data to nearby smartphone without a battery. The proposed system can help develop portable or bio-mimetic energy supply for sustainable use with further improvement.

Humanism of The Movie by Foucault (푸코로 읽는 영화 <네버 렛 미 고>의 휴머니즘)

  • Choi, Young-Mi;Jo, I-Un
    • The Journal of the Korea Contents Association
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    • v.18 no.1
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    • pp.395-402
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    • 2018
  • This study aims to analyze the film "Never Let Me" by human value which is to be realized in the social structure suppressed by the power of life and the power of discipline in Foucault 's power theory. After 18century having changed monarch power holding the power of life-and-death that enforced corporal punishment, bio-power that corrected body and granted ability suitable discipline to people makes people worked like machine. In control of the bio-power, human achieved safe desire that cure disease and prolong life-span and worked as producer goods. School controls body and make people internalized rule using discipline for working bio-power efficiently. There is differentiation between this movie and the other about human clone. The clones adapt role as organ donator without resistance and there is no conflict between original and copy. Instead of preexistence novel and movie that is set in future, it is a form of past retrospect from the 1970s to 1990s. having emotions, They find independence ego and realize value of life in finite living by depending relation or undergoing loss.

A Study on the Quality Characteristics of Feedstocks for Power Bio-Fuel Oil (발전용 바이오중유용 원료물질의 품질특성 연구)

  • Jang, Eun-Jung;Lee, Mi-Eun;Park, Jo-Yong;Min, Kyung-Il;Yim, Eui-Soon;Ha, Jong-Han;Lee, Bong-Hee
    • Journal of the Korean Applied Science and Technology
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    • v.32 no.1
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    • pp.136-147
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    • 2015
  • As it carry out RPS(Renewable Portfolio Standards), power producers are using the power bio-fuel oil to meet their RPS quota. In this study, we test the quality characteristics of raw materials for power bio-fuel oil and the property changes of power bio-fuel oil by the kind of feedstocks. The power bio-fuel oil and feedstocks were analyzed for item of quality standard such as acid number, viscosity and metal contents. And it was analyzed for composition distribution by FT-IT and HPLC. Such as low priced palm oil series has high acid number and ash contents due to high free-fatty acid and metal contents. And by-product of biodiesel have a tendency of high viscosity. The fuel properties of power bio-fuel oil, such as viscosity, acid number and metal contents are correlated with the constituent and the mixing ratio of the feedstocks.

A Study on the Quality Characteristic of Power Bio-Fuel Oil for Alternative Fuel oil (중유 대체연료로서 발전용 바이오중유의 품질특성 연구)

  • Jang, Eun-Jung;Park, Jo-Yong;Min, Kyung-Il;Yim, Eui-Soon;Ha, Jong-Han;Lee, Bong-Hee
    • Journal of the Korean Applied Science and Technology
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    • v.31 no.4
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    • pp.562-571
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    • 2014
  • In these days, many countries carry out many renewable energy policies to increase the renewable energy portion and to reduce the GHG(Green House Gas). In Korea, RPS(Renewable Portfolio Standards) focused on over 500MW power producers is conducting. And they are using the bio-fuel oil to meet their RPS quota. The oil is a mixture of animal and vegetable fat or fatty acid ester of them and should satisfy some specifications to use the power generation such as viscosity, pour point, acid number. Depends on the raw materials, quality characteristics of power bio-fuel oil are changed. By adding the power bio-fuel oil, pour point, density, sulfur content and viscosity are decreased and acid number, iodine number, oxygen content are increased. In this study, we test the quality characteristic of power bio-fuel oil and the property changes by the blending ratio of power bio-fuel oil & conventional fuel oil.

A Study on the Development of Bio-gas Engine Using Livestock Manure - Fundamental Design and Experimental Analysis on the Performance - (축분을 이용한 바이오가스 엔진 개발 - 기초설계 및 성능분석 -)

  • Paek Y.;Kim Y. J.;Kang G. C.;Ryou Y. S.;Cho K. H.
    • Journal of Biosystems Engineering
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    • v.30 no.6 s.113
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    • pp.354-359
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    • 2005
  • This is a fundamental study to develop a bio-gas utilization technology using livestock manure. Especially, this study was carried out to develop an engine using bio-gas. A bio-gas engine was designed and manufactured by modification of a diesel engine of 3 cylinders powering 13.31 kW/2800 rpm, changing the fuel supplying system fit for bio-gas. The result showed that, when the Air/Fuel ratio was controlled with fixed spark timing, the power of biogas-fueled engine is about $10.6{\~}14.6\%$ lower then that of LNG-fueled engine because of low volumetric efficiency. The engine output and torque was $11.85{\~}13.3$ kW, $39.5{\~}40.8\;N{\cdot}m$, respectively at the engine speed of 2600 rpm. Bio-gas consumption rate was 260.20 g/kW/hr, 315.20 g/kW/hr in engine speed or 1000 rpm, 2800 rpm, respectively.

Effects of Biofertilizer on the Quality and Antioxidant Property of Rice (Oryza sativa L.)

  • Rico, Cyren Mendoza;Bhuiyan, Mohammad Kamrul Islam;Mintah, Lemuel O.;Shin, Dong-Il;Chung, Il-Kyung;Son, Tae-Kwon;Lee, Sang-Chul
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.52 no.3
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    • pp.274-280
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    • 2007
  • The effect of biofertilizer in enhancing nutrient quality and antioxidant property of rice grain was investigated. The experiment was carried out in a randomized complete block design with 3 replications and 7 treatments namely : RF = $N-P_2O_5-K_2O(11-5.5-4.8kg\;10a^{-1});$ half of the recommended fertilizer rate, $HRF=N-P_2O_5-K_2O(5.5-2.75-2.4kg\;10a^{-1}):$ HRF+Bio 250=HRF combined with 250 kg Biofertilizer 10 $a^{-1}$; HRF+Bio 500=HRF combined with 500 kg Biofertilizer 10 $a^{-1};$ Bio 250=250 kg Biofertilizer 10 $a^{-1};$ Bio 500=500 kg Biofertilizer 10 $a^{-1};$ and NF=No Fertilizer. Results showed that HRF+Bio 500 obtained a significantly higher protein content but a significantly lower amylose content compared with RF and NF treatments. Highest phytic acid content was recorded in NF treatment while the lowest was observed in HRF+500 treatment. The highest values in both electron donating ability and reducing power were obtained in HRF+Bio 500 treatment. All treatments obtained higher reducing power than that of the RF treatment and that NF treatment showed comparable values in both electron donating ability and reducing power with those of the treated plots. Highest antimutagenicity property was also observed in HRF+Bio 500 treatment followed by Bio 500 treatment. This study showed the possibility of using biofertilizer to enhance nutritional quality and antioxidant property of rice.

Analysis of Power Shuttle Characteristics of Agricultural Tractor (농업용 트랙터의 전후진 파워시프트 변속 특성 해석)

  • 김대철;이호상;정병학;김경욱
    • Journal of Biosystems Engineering
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    • v.27 no.6
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    • pp.479-490
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    • 2002
  • A dynamic model of a power shuttle transmission was developed and its validity was verified using the experimental data obtained from a transmission test bench. A 40㎾, 4WD tractor was also modeled using an application software EASY5 to investigate parameters and their effects on the power shifting performance. For a tractor model, the manual reverse gear was replaced by a power shuttle transmission. The tractor model also included an engine, main-gears for transmission, wheels, differentials and planet gears. Using the tractor model, the effects of the parameters such as modulating pressure and time, engine speed, tractor speed. tractor weight. reverse to forward speed ratio and torsional damper on the transient characteristics at starting and shuttle shifting were investigated by the computer simulation. The transient characteristics were represented by variations in clutch pressure, torque transmitted to input shaft and driving wheels, and power transmission capacity of the clutch. It was found that the modulating pressure and time affected most significantly the torque transmission and shifting time. The input torque, axle torque, power transmission capacity of the clutch and transmission time all increased with increase in engine speed, tractor speed. tractor weight and ratio of reverse to forward speeds. However, the axle torque decreased with tractor speed. Both the axle torque and power transmission capacity of the clutch also decreased with the ratio of reverse to forward speeds.

Bio-Piezoelectric Generator with Silk Fibroin Films Prepared by Dip-Coating Method (딥코팅에 의한 실크 피브로인막으로 제조한 바이오 압전발전기)

  • Kim, Min-Soo;Park, Sang-Shik
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.34 no.6
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    • pp.487-494
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    • 2021
  • Piezoelectric generators use direct piezoelectric effects that convert mechanical energy into electrical energy. Many studies were attempted to fabricate piezoelectric generators using piezoelectrics such as ZnO, PZT, PVDF. However, these various inorganic/organic piezoelectric materials are not suitable for bio-implantable devices due to problems such as brittleness, toxicity, bio-incompatibility, bio-degradation. Thus, in this paper, piezoelectric generators were prepared using a silk fibroin film which is bio-compatible by dip-coating method. The silk fibroin films are a mixed state of silk I and silk II having stable β-sheet type structures and shows the d33 value of 8~10 pC/N. There was a difference in output voltages according to the thickness. The silk fibroin generators, coated 10 times and 20 times, revealed the power density of 16.07 μW/cm2 and 35.31 μW/cm2 using pushing tester, respectively. The silk fibroin generators are sensitive to various pressure levels, which may arise from body motions such as finger tapping, foot pressing, wrist shaking, etc. The silk fibroin piezoelectric generators with bio-compatibility shows the applicability as a low-power implantable piezoelectric generator, healthcare monitoring service, and biotherapy devices.

Design for Landfill Gas Application by Low Calorific Gas Turbine and Green House Optimization Technology (Low Calorific Gasturbine 매립지 적용 및 유리온실 운용기술 설계)

  • Hur, Kwang-Beom;Park, Jung-Keuk;Lee, Jung-Bin;Rhim, Sang-Gyu
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.06a
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    • pp.244.1-244.1
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    • 2010
  • 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.

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A Low-Power Design of Delta-Sigma Based Digital Frequency Synthesizer for Bio Sensor Networks (의료용 센서 네트워크를 위한 저전력 델타 시그마 디지털 주파수 합성기 설계)

  • Bae, Jung-Nam;Kim, Jin-Young
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.17 no.5
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    • pp.193-197
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    • 2017
  • In this paper, we present a low-power delta-sigma based digital frequency synthesizer with high frequency resolution for bio sensor networks. Biomedical radio-frequency (RF) transceivers require miniaturized forms with a long battery life and low power consumption. For the technology scaling, digital circuits have become preferable compared to analog circuits because of the aggressive cost, size, flexibility, and repeatability. Therefore, the digital circuits based on standard-cell library are used to reduce a power consumption. Additionally, a delta-sigma is used for making fractional frequency tuning range. From the simulation, we confirmed that proposed scheme has good performance in accordance with power and frequency resolution.