• Title/Summary/Keyword: 수소-LPG

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An Experimental Study on Hydrocarbon Emission Characteristics of Hydrogen Enriched LPG Fuel in a LPG Engine at Cold Start (LPG 기관의 수소 분사비율에 따른 냉간시동시 미연탄화수소 배출 특성에 관한 실험적 연구)

  • LEE, YEONGJAE;KIM, HYUNGKEUN;BANG, TAESEOK;LEE, JAEWOONG;CHO, YONGSEOK
    • Transactions of the Korean hydrogen and new energy society
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    • v.26 no.4
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    • pp.363-368
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    • 2015
  • Finding an alternative fuel and reducing environmental pollution are the main goals for future internal combustion engines. The purpose of this study is to obtain low-emission and high-efficiency by hydrogen enriched LPG fuel in a LPG engine. An experimental study was carried out to obtain fundamental data for the emit HC emission characteristics at cold start of pre-mixed LPG and hydrogen in a LPG engine with various fractions of hydrogen-LPG blends. To maintain equal volume ratio of fuel blend, the amount of HC was decreased as hydrogen was gradually added. The results showed that as hydrogen increases, in-cylinder pressure increased. Also emission of unburned hydrocarbon (HC) is sharply decreased.

A Study on the Quantitative Risk Assessment of Hydrogen-LPG Combined Refueling Station (수소-LPG 복합충전소 정량적 위험성평가에 관한 연구)

  • Kang, Seung Kyu
    • Journal of Energy Engineering
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    • v.28 no.4
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    • pp.29-34
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    • 2019
  • In this study, a quantitative risk assessment was carried out for a hydrogen complex station. The complex fueling station to be evaluated was hydrogen-LPG, and the components of each station were analyzed and the risk was evaluated. The final risk is assessed by individual and societal risks, taking into account the impact of damage and the frequency of accidents. As a result of individual risk calculation for the hydrogen-LPG fueling station that is the subject of this study, the hydrogen-LPG type fueling station does not show the unacceptable hazardous area (> 1 × 10E-3) proposed by HSE. The level of individual risk for both the public and the worker is within acceptable limits. In societal risk assessment, the model to be interpreted shows the distribution of risks in an acceptable range(ALARP, As Low As Reasonably Practicable). To ensure improved safety, we recommend regular inspections and checks for high-risk hydrogen reservoirs, dispensers, tube trailer leaks, and LPG vapor recovery lines.

An Experimental Study on the Performance and Emission Characteristics with Hydrogen Enrichment at Part Load Conditions Using a LPG Engine (LPG기관의 부분부하 조건에서 수소 혼합에 따른 성능 및 배출가스 특성에 관한 실험적 연구)

  • Kim, Ingu;Kim, Kijong;Lee, Seangwock;Cho, Yongseok
    • Transactions of the Korean hydrogen and new energy society
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    • v.24 no.3
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    • pp.242-248
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    • 2013
  • The purpose of this study is to obtain low-emission and high-efficiency by hydrogen enriched LPG fuel in LPG engine and is to clarify the effects of hydrogen enrichment in LPG fuelled engine on exhaust emission and performance. An experimental study was carried out to obtain fundamental data for performance and emission characteristics of hydrogen enrichment in LPG engine. The research was held by changing the hydrogen ratio to 0, 5, 10, 20% in 1500rpm, bmep 2 and 4bar. The result turned out that the combustion duration was shortened due to fast flame propagation of hydrogen. And the amount of Carbon dioxide and Hydrocarbon decreased. However, the amount of NOX increased, which is thought to be the result of high adiabatic flame temperature of hydrogen. It has been confirmed that this phenomenon has changed by the Hydrogen mixing ratio.

Comparison of H2, LNG, and LPG explosion characteristics in a limited space using CFD Simulation (CFD 시뮬레이션을 이용한 제한된 공간에서의 수소, LNG, LPG 폭발특성 비교)

  • Baek, Ju-Hong;Lee, Hyang-Jig;Jang, Chang Bong
    • Journal of the Korean Institute of Gas
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    • v.20 no.3
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    • pp.12-21
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    • 2016
  • The demand for hydrogen is steadily increasing every year, and the facilities to produce and transfer hydrogen are being increased as well. Therefore, the possibility of a critical accident at hydrogen is expected to increase. Furthermore, the materials most likely to cause accidents at industrial sites are LPG 61%, hydrogen 12%, and LNG 10%, and the frequency of accidents due to these three combustible gases is relatively high. Thus, a CFD simulation was used to compute the explosion risk of danger-frequent combustible gases-hydrogen, LNG, and LPG-within a limited space, and the outcomes were compared and analyzed to review the risk of explosion of each gase within a limited space.

An Experimental Study on the Performance Characteristics of a Hydrogen Fueled LPi Engine (LPi기관에서 수소첨가에 따른 성능특성에 관한 실험적연구)

  • Choi, Gyeung Ho
    • Transactions of the Korean hydrogen and new energy society
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    • v.15 no.2
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    • pp.129-136
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    • 2004
  • 환경문제와 석유자원의 고갈이 많은 연구자들을 기존 탄화수소연료를 대체할수 있는 재생 가능한 연료를 구하는데 많은 노력을 기울이고 있다. 수소연료는 유해배기물질이 없는 연소와 또한 연소후에 재생 가능한 물성분만 배출하는 속성으로 미래의 청정에너지로 각광을 받고 있다. 이러한 이유로 수소연료는 수송기계의 연료로도 주목을 받고 있다. 따라서 수소연료기관 개발은 21세기에도 지속적으로 진행될 것이다. 이에대한 초기연구로 기체 LPG 연료가 아닌 액체 LPG 연료를 흡기관에 분사하여 기화된 LPG 연료를 엔진으로 흡입하는 LPi엔진에 수소연료를 과급하여 엔진에 성능을 연구하고자 하였다.

Application Research on LPG Injector type Plasma Reformer (LPG 인젝터형 플라즈마 개질기 적용연구)

  • Kim, Changup;Lee, Deahoon
    • Journal of the Korean Institute of Gas
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    • v.18 no.1
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    • pp.1-7
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    • 2014
  • In this study, plasma reformer technology with a LPG injector was investigated. It was developed with injection of LPG fuel and air in a region where the plasma discharge to make the thermal decomposition carbon fuel and to generate additional hydrogen. As a result of reforming test, when power is 70~100W supply, about HC 0.7% of the full reformed gas and hydrogen was generated from 1.2 to 1.5 %.

Characteristics of LPG fuel Reforming in Plasma Reformer for Hydrogen Production (수소 생성을 위한 플라즈마 개질기에서의 LPG 연료의 개질 특성)

  • Park, Yunhwan;Lee, Deahoon;Kim, Changup;Kang, Kernyong
    • Journal of the Korean Institute of Gas
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    • v.17 no.6
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    • pp.8-14
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    • 2013
  • In this study, characteristics of the geometric design changes of plasma reformer for LPG fuelled vehicles were studied. To improve the yield of hydrogen, reformer 1st, and 2nd were designed. Secondary reformer compared to the primary reformer to increase the volume of the rear part of reformed gas having passed through the plasma and increased reaction time. To compare reforming results of two reformers, various experimental conditions such as, from partial oxidation to total oxidation conditions $O_2/C$ ratios, and total flow rate of 20, 30, 40, 50 lpm conditions, were varied. Results showed that with increasing $O_2/C$ ratios, LPG conversion rate increased, decreased hydrogen selectivity and hydrogen yield optimal point existed and secondary reformer 4.5 times larger than the primary reformer at the same flow rate to 4~14% increase in the yield of hydrogen.

An Experimental Study on the Combustion and Emission Characteristics of Hydrogen Enriched LPG Fuel in a Constant Volume Chamber (정적연소기내 H2-LPG 연료의 혼합 비율에 따른 연소 및 배출가스 특성에 관한 실험적 연구)

  • Lee, Seang-Wock;Kim, Ki-Jong;Ko, Dong-Kyun;Yoon, Yu-Bin;Cho, Yong-Seok
    • Transactions of the Korean hydrogen and new energy society
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    • v.23 no.3
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    • pp.227-235
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    • 2012
  • Finding an alternative fuel and reducing environmental pollution are the main goals for future internal combustion engines. The purpose of this study is to obtain low-emission and high-efficiency by hydrogen enriched LPG fuel in constant volume chamber. An experimental study was carried out to obtain fundamental data for the combustion and emission characteristics of pre-mixed hydrogen and LPG in a constant volume chamber (CVC) with various fractions of hydrogen-LPG blends. To maintain equal heating value of fuel blend, the amount of LPG was decreased as hydrogen was gradually added. Exhaust emissions were measured using a HORIBA exhaust gas analyzer for various fractions of hydrogen-LPG blends. The results showed that the rapid combustion duration was shortened, and the rate of heat release elevated as the hydrogen fraction in the fuel blend was increased. Moreover, the maximum rate of pressure rise also increased. These phenomena were attributed to the burning velocity which increased exponentially with the increased hydrogen fraction in the $H_2$-LPG fuel blend. Exhaust HC and $CO_2$ concentrations decreased, while NOX emission increased with an increase in the hydrogen fraction in the fuel blend. Our results could facilitate the application of hydrogen and LPG as a fuel in the current fossil hydrocarbon-based economy and the strict emission regulations in internal combustion engines.

Characteristics of LPG Fuel Reforming Utilizing Plasma Reformer (LPG 연료의 플라즈마 개질 특성연구)

  • Park, Yunhwan;Lee, Deahoon;Kim, Changup;Kang, Kernyoung;Cho, Yongseok
    • Journal of the Korean Institute of Gas
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    • v.16 no.6
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    • pp.17-22
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    • 2012
  • In this study, characteristics of reforming process of Automotive LPG fuel using plasma reactor are investigated. Because plasma reformer technology has advantages of a fast start-up and wide fuel/oxidizer ratio of operation, and reactor size is smaller and more simple compared to typical combustor and catalytic reactor, plasma reforming is suitable to the on-board vehicle reformer. To evaluate the characteristics of the reforming process, parametric effect of $O_2$/C ratio, reactant flow rate and plasma power on the process were investigated. In the test of varying $O_2$/C ratio from partial oxidation stoichiometry to combustion stoichiometry, conversion of LPG was increased but selectivity of $H_2$ decreased. The optimum condition of $O_2$/C ratio for the highest $H_2$ yield was determined to be 0.8~0.9 for 20~50 lpm. The result can be a guide to map optimal condition of reforming process.