• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.742-749
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• 2008

In 21th century, high oil price and environmental pollution appeared by serious social problem. It brought important change of logistics environment, and environmentally-friendliness and sustainability are emphasized. In spite of that railroad has high energy efficiency and environmental-friendliness to advantage traditionally, there is still transport division rate of railroad in declining tendency as investment policy that is concentrated on road and insufficiency of social realization about environmental problem. The construction of environment-friendly transport system and the reasonable role sharing between modes of transportation are important. Transportation policy of Korea is presented through plans to constructs efficiently and manages national transportation system. In this study, examine development process of national railroad logistics plan with logistics environment change, and proposes the following ways to development of railroad logistics policy.

• 환경영향평가
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• 제26권2호
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• pp.105-113
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• 2017

최근 국토의 산악자원을 활용한 철도를 도입하는 등 산악관광 활성화를 도모하려는 움직임이 나타나고 있으며, 친환경 교통수단으로의 철도수송 분담률을 증대시키려는 정책이 수행됨에 따라 단선철도의 복선화 및 선형개량 사업 등 전국 철도망이 확대되고 있는 추세이다. 그러나 "환경친화적 철도지침"에 따르면, 철도건설 시 고려해야 할 주요 환경영향평가항목으로 대기질, 수질, 지형 지질, 동 식물상, 자연환경자산, 소음 진동, 위락 경관 등 7개 항목을 선언적으로만 제시하고 있으며, 특히 동 식물상과 자연환경자산 항목에서는 법제적 측면에서 환경보호지역의 유무만을 고려하고 있다. 이에 따라 본 연구에서는 환경 생태적 가치를 정량적 평가항목으로 고려할 것을 제안하였고, 이를 계량적으로 뒷받침하기 위해 평가 지표와 평가 항목을 선정하고 각각의 주제도와 철도망을 중첩하여 분석하였다. 주요 지표로 자연성과 다양성을 선정하였고, 각 지표별 항목의 평점을 산정하여 철도개발지 선정에 반영하고자 하였다. 이와 같은 평가 방법을 활용하여 추후 환경친화적인 철도건설에 적용할 수 있을 것으로 판단된다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.296-302
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• 2004

After the Rio declaration on environment and development in 1992, developed countries are undertaking 'environmentally sustainable transportation (EST)' projects. To meet the needs for EST, current transportation policies in Korea are rapidly reforming and one of its concerns is modernizing and upgrading railway freight system. Planning new railroad construction projects is increasing and subsequent environmental impact assessment (EIA) demands improvements, especially in both the EIA and decision making systems. In this paper, we discuss the present status of EIA for railroad construction projects, especially, by analyzing the EIA documents accumulated for last six years. The EIA for railroad construction projects .accounts for only $4.9\%$ of total project EIAs during 1998-2003. However, the portion is gradually increasing. Major environmental concerns for EIA in railroad construction projects were geomorphological and ecological changes, protection of rare organisms, air pollution, water quality, wast management, noise, etc. We also compared the characteristics of environmental impacts of railroad construction with those of vehicle road construction. The result shows that railroad construction usually requires 3${\~}$4 times longer tunnels and bridges for a given length than vehicle road construction. In addition, the amounts of geomorphological and ecological changes (road-cutting, embankment, devegetation, etc.) in railroad construction were generally less than $40\%$ of those in vehicle road construction. In order to develop environmentally friendly railway systems, monitoring studies for environmental impacts of railroads such as habitat fragmentation and road kills, dispersal of alien plants, tunnelling effects on groundwater and vegetation, and noise impacts are highly required.

• 환경영향평가
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• 제13권6호
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• pp.295-305
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• 2004

After the Rio declaration on environment and development in 1992, developed countries are undertaking "environmentally sustainable transportation (EST)" projects. To meet the needs for EST, current transportation policies in Korea are rapidly reforming and one of its concerns is modernizing and upgrading railway freight system. Planning new railroad construction projects is increasing and subsequent environmental impact assessment (EIA) demands improvements, especially in both the EIA and decision making systems. In this paper, we discuss the present status of EIA for railroad construction projects, especially, by analyzing the EIA documents for the last six years. The EIA for railroad construction projects accounts for only 4.9% of total 918 project EIAs during 1998-2003, and the portion is gradually increasing. Major environmental concerns for EIA in railroad construction projects were geomorphological and ecological changes, protection of rare organisms, air pollution, water pollution, waste management, and noise, etc. We compared characteristics of environmental impacts of railroad construction with those of vehicle road construction, based on environmental and construction-planning indicators appeared in Environmental Impact Statements. Railroad construction usually requires longer tunnels and bridges for a given length than those for vehicle road construction. In addition, the amounts of geomorphological and ecological changes (road-cutting, embankment, devegetation, etc.) in railroad construction were generally less than 50% of those in vehicle road construction. To develop environmentally friendly railway systems, monitoring studies for environmental impacts of railroads such as habitat fragmentation and road kills, dispersal of alien plants, tunnelling effects on groundwater and vegetation, and noise impacts are highly recommended.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.589-593
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• 2007

Due to sustainable development, international environmental regulations have been reinforced continuously. Especially, Kyoto protocol related to energy consumption affects to national production system seriously. Even if railroad is the most environmental- friendly transportation, it is necessary to improve its environment. Life cycle assessment (LCA) is a representative tool to evaluate the environment impacts of a product. In the EU's railroad companies, the recycling efficiency and the waste emissions of rolling stocks have improved considering their environment impacts with LCA from a design step. Also, the LCA system of Korean electric motor units has been developed to build an environmentally sound railroad as one of national transportation core technology R&D projects. Therefore, the introduction of LCA will be required to decrease environmental impacts released from rolling stocks in the future.

• 전기학회논문지
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• 제67권12호
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• pp.1729-1734
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• 2018

Recently, interest in environmentally friendly transportation systems has been increasing, and study on railway systems has been aggressively conducted. Therefore, lots of studies have been done in railway advanced countries to improve performance of PWM converter. The research on the PWM converter for railway vehicle was mainly carried out on the converter mounted on railway vehicle such as the high-speed railway and metropolitan railway. In also, a lot of study has been carried out to improve converter performance installed in the ground. The high-capacity transform used in this paper converted from AC 22.9kV to AC 590V. The converter changed from AC 590V to DC 950V. In general, in the case of rectifier, the DC power supply system has a negative impact on inverter control characteristics because it can not avoid the pulsating component. In this study, it was performed current control for high-capacity converter using Matlab Simulink. The PWM converter is normally performed through the voltage and current at starting mode, powering mode, and braking mode. In the light-load test and the on-line test, we have studied for the PWM converter characteristics. Using this research, we have founded that the converter has excellent performance.

• 조명전기설비학회논문지
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• 제30권1호
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• pp.38-43
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• 2016

Recent social needs for promoting traffic safety increased and the demand social security in economic, increasing the demand for environmentally friendly rail transport. In particular, when train express such as to secure reliability KTX(Korea Train eXpress) from potential disaster(fire) in the train operation caused by the train express running has been very important. Railroad fire extinguishing system is operated to fire exploding before reaching the flashing point more important than early to quickly detect because of CAN(Controller Area Network) communication to fire suppression and fire receiver, interface, fire fighting equipment from HMI((Human Machine Interface) and fire high-performance to research and development for intelligent composite fire receiver is required.

• International Journal of Railway
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• 제9권2호
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• pp.41-45
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• 2016

In this paper, a study on the efficiency improvement of the magnetic levitation train using the LIM (Linear Induction Motor) was presented. The maglev train has the advantage of being environmentally friendly since much less noise and dust is produced. However, due to structural limitation, compared to a rotating induction motor, linear induction motor, the main propulsion engine of the maglev train has a relatively greater air gap and hence has the lower operation efficiency. In this paper, the relationship between the operating condition of the train and the slip frequency has been investigated to find out the optimum slip frequency that might improve the efficiency of the magnetic levitation train with linear induction motor. The slip frequency is variable during the operation by this relationship only within a range that does not affect the levitation system of the train. After that, the comparison of the efficiency between the conventional control method with the slip frequency fixed at 13.5[Hz] and the proposed method with the slip frequency variable from 9.5[Hz] to 6.5[Hz] has been conducted by simulation using Simplorer. Experiments of 19.5[ton] magnetic levitation trains owned by Korea Institute of Machinery and Materials were carried out to verify the simulation results.

• 대한토목학회논문집
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• 제32권2D호
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• pp.175-182
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• 2012

최근 철도정책이 KTX 개통 이후 속도 향상, 편의성 개선, 역 중심의 공간창출 등 이용자 서비스 중심으로 전환하는 중에 있다. 이는 철도의 차별화 서비스 전략으로 녹색교통수단의 입지를 강화하고자 하는 데 있다. 이러한 철도 유틸리티 개선 노력에도 불구하고 국민의 자동차 의존적 교통행동양식 때문에 자동차에서 철도로의 전환에 한계가 있다. 본 논문에서는 수도권 통근자 대상으로 자동차 의존성을 분석하였다. 자동차 의존성 분석결과 환경의식은 대중교통만족도와 함께 자동차 의존성에 영향을 미치는 중요한 변수로 작용하였고, 이는 철도 서비스 개선과 함께 환경의식을 이용한 사회마케팅이 자동차의존성을 약화시킬 수 있는 정책대안이 될 수 있다 것을 확인하였다.

• 한국건설순환자원학회논문집
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• 제11권4호
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• pp.501-508
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• 2023

이 연구는 도시화와 교통량 증가로 인해 심화되는 환경 소음 문제에 대응하여, 친환경적인 무기계 흡음 패널을 개발함으로써 기존의 PMMA 및 시멘트 기반 패널의 한계를 극복하고자 한다. 이러한 전통적인 패널들은 가연성으로 인한 안전 위험과 탄소 배출로 인한 환경 문제를 가지고 있다. 산업폐기물을 활용한 이 연구는 두 단계로 구성된다: 첫째, 물리적 및 성능적 특성(유동성, 밀도, 압축 강도, 흡음률)에 대한 기초 시험, 둘째, 최적화된 패널 혼합물의 개발. 이 접근 방식은 기존 패널을 지속 가능하고 효과적인 대안으로 대체하고자 하며, 안전하고 환경적으로 책임 있는 도시 인프라에 중요한 기여를 목표로 한다. 연구 결과는 방음 패널 시장에 대한 새로운 해결책을 제시하며, 소음 제어와 함께 환경 및 안전 기준에 부합하는 혁신을 추구한다.