• 한국BIM학회 논문집
• /
• 제11권2호
• /
• pp.43-53
• /
• 2021

The 'public agency oil joint purchase system' was introduced to lower public sector oil prices and contribute to the stability of the overall consumer oil market. The present study used spatial regression to analyze the factors affecting domestic gasoline price, focusing on the impact of potential implicit collusion among gas stations in determining domestic gasoline prices. Also, this study investigated the effect the location characteristics of the market convention gas stations and government offices on the pressure of price competition in the market and the gasoline price at general gas stations. To summarize the results of the spatial lag model (SLM), the individual characteristics of gas stations such as convenience stores (+), self-fuelling (-), commercial areas (+), subway stations (+), population density (-), and sales (-) are correlated to gasoline prices at gas stations, and the institutional location factors of gas stations (+) affected the average of 9 won per liter, 11 won per liter. In order to solve these problems, the establishment of a monitoring system reflecting the location characteristics of the region and the ongoing review of the system should be carried out. In addition, separate, expanded and promotional measures should be prepared for the convenience of general and public oil buyers.

• 한국기후변화학회지
• /
• 제7권3호
• /
• pp.217-229
• /
• 2016

Increased evidences reveal that the global climate change adversely affect on the environment. Smart grid system is one of the ways to reduce greenhouse gas emissions in the electricity generation sector. Since 2013, Korea Electric Power Corporation (KEPCO) has installed smart grid station in KEPCO office buildings. The goal of this paper is two folds. One is to quantify the reduction in greenhouse gas emissions through smart grid stations installed in KEPCO office buildings as a part of pilot project. Among components of smart grid stations, this research focused on the photovoltaic power system (PV) and energy storage system (ESS). The other is to estimate the reduction in greenhouse gas emissions when PV is applied on individual houses. Results show that greenhouse gas emissions reduce 5.8~11.3% of the emissions generated through the electricity usage after PV is applied in KEPCO office buildings. The greenhouse gas emissions reduction from ESS is not apparent. When PV of 200~500 W is installed in individual houses, annual greenhouse gas emission reduction in 2016 is expected to be approximately $2.2{\sim}5.4million\;tCO_2-eq$, equivalent to 6~15% of greenhouse gas emissions through the electricity usage in the house hold sector. The saving of annual electricity cost in the individual house through PV of 200 W and 500 W is expected to be 47~179 thous and KRW and 123~451 thousand KRW, respectively. Results analyzed in this study show the environmental effect of the smart grid station. In addition, the results can be further used as guidance in implementing similar projects.

• 한국가스학회:학술대회논문집
• /
• 한국가스학회 2003년도 춘계학술발표회 논문집
• /
• pp.99-104
• /
• 2003

• 에너지공학
• /
• 제28권4호
• /
• pp.1-7
• /
• 2019

최근 수소충전소 수요 증가에 따라, 산업통상자원부는 LPG, CNG, 주유소 등 기존의 자동차용 연료공급시설 내에 융합, 복합의 형태로 수소충전소 설치가 가능하도록 특례고시를 제정·공포하였다. 수소 융복합충전소는 특례기준 제정 이전까지 국내에서 운영된 사례가 없어, 4계절, 일교차와 같은 환경특성을 감안한 실증이 필요하다. 본 연구에서는, 국내 최초로 실증을 위해 설치된 울산 LPG-수소복합충전소의 충전데이터를 수집하여 분석하였다. 충전데이터는 압축기, 저장용기, 디스펜서에서 발생한 시간별 온도, 압력 데이터이며, 계절별 특성을 비교하기 위해 2018년 7월 중 울산 지역의 최고기온 일과 2018년 1월 중 최저기온 일을 포함하여 4계절 충전데이터를 수집하여 비교하였다. 비교결과, 외기온도의 변화가 수소차 차량용기의 초기온도에 영향을 미치는 것으로 나타났으며, 이는 최종적으로 차량의 충전시간과 충전속도에도 영향을 미치는 것으로 나타났다. 국내 수소충전소 기준(KGS FP217)과 미국의 충전프로토콜(SAE J2601)에서 제시한 한계온도를 초과한 경우는 없어 차량용기에 대한 영향은 없는 것으로 나타났다.

• 한국가스학회지
• /
• 제3권2호
• /
• pp.24-33
• /
• 1999

충전소에서 일어난 사고를 1987부터 1998년까지 사고자료를 근거로 하여 사고 시나리오와 사고발생 초기의 피해거리를 살펴보고, 이를 바탕으로 국내$\cdot$외 안전거리를 비교$\cdot$검토하여 적절한 안전거리에 대하여 살펴보았다. 안전거리는 시설과의 최소한 이격거리를 두어 사고 발생시 점화가능성을 줄이고 원활한 방재활동과 피해확산을 방지하기 위한 것으로서 가스누출시 제트화재의 길이 또는 누출가스의 연소하한농도의 도달거리와 관계가 있으며, 안전장치 설치현황, 안전관리자의 의식수준, 그리고 경제성을 검토하여 안전거리를 결정할 수 있도록 저장량에 따른 안전거리의 범위를 제시하였다.

• 조명전기설비학회논문지
• /
• 제25권7호
• /
• pp.49-54
• /
• 2011

Now the world will regulate the CO2 emission due to environmental issues. For an alternative plan photovoltaic system is watched. So, photovoltaic system is trend of big city and it is mandatory for renovation of construction. Oil & gas filling station existed in city is suitable to found the photovoltaic system. But the general photovoltaic system in oil & gas filling station is difficult to found because it is classified into hazardous area. This paper evaluates intrinsic safety evaluation of solar cell for making basic data to found for the photovoltaic system on hazardous area. The intrinsic safety characteristic is evaluated by short-circuit ignition test using IEC type spark ignition test apparatus and temperature rising test. The result of short-circuit ignition test, propane-air mixture gas is exploded on condition that 4 solar cells(9[V], 90[mA]) are connected serially under insolation 800[W/$m^2$]. So, if a larger solar module will be used at oil & gas filling station than we were tested, it needs explosion proof. As the result of rising temperature test, the temperature rising due to short circuit is not so much, but when the temperature rises due to radiant heat, it demands careful consideration for environmental influence.

• 한국가스학회지
• /
• 제23권6호
• /
• pp.74-80
• /
• 2019

수소를 고압으로 압축하여 사용하는 수소충전소는 안전 확보를 위해 설비간의 안전거리를 규정하고 있다. 수소 충전소에서 발생하는 사고 중 대부분의 사고는 누출사고이며, 누출 시 점화로 인해 제트화염이 생성된다. 고압의 수소 누출로 인한 가스 확산 및 제트화염의 해석은 안전거리 설정에 가장 중요한 요소이다. 본 연구에서는 고압의 환경에서 운용되는 수소충전소에서 발생할 수 있는 누출사고를 대비한 안전관리 규정 도출을 위하여 누출원 크기별 누출조건을 모사하고 위험거리 등을 파악하여 향후 안전기준 제정 시 참고자료로 활용하고자 한다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2007년도 심포지엄 논문집 정보 및 제어부문
• /
• pp.439-441
• /
• 2007

The seoul metropolitan subway has installed 8 lines and about 500 stations to transport 5 million passengers everyday. The underground air pollution level in the subway stations is very severe status, which is very harmful to the commutators and its personals. Although subway roles as such a massive and huge transportation system, the subway doesn't adapt yet any real-time air monitoring system. They have only some hand-held type detector equipments for monitoring air pollution. Therefore subway passengers are exposed to the harmful air pollution environment. The most harmful environmental parameters among the air pollution are known as the dust and sound noise dB level in the subway station. Because the dust is consisted of very small particles, we can't see them easily in dark condition on the platform, but it is very harmful. The monitoring system for air pollution is developed using embedded system attached with 6 different environmental sensors. This system monitors air pollution of dust sound noise, gas, temperature, humidity, inflammable gas, toxic gas in the subway ?station. The sensor unit of the ARM-CPU board and sensor transmits real time environmental data to the main server using Zigbee wireless communication module and TCP/IP network. The main control server receives and displays the real-time environmental data, and it send alarms to the personals when high level value.

• 한국가스학회지
• /
• 제24권6호
• /
• pp.83-90
• /
• 2020

본 연구는 국제공동 연구로 만들어진 HyKoRAM 프로그램을 이용하여 위험성평가를 진행하였다. 수소충전소 내 압축기, 저장탱크, 수소 배관 등 주요 시설 및 구성품의 설계 사양, 실증 단지 주변의 환경 조건 등을 반영한 대안의 사고 시나리오와 시설에서 발생할 수 있는 최악의 시나리오에 기반하여 위험성 평가를 실시하였다. 수소충전소의 잠재 위험을 확인하여 수소 저장 탱크, 처리 시설, 저장 시설 등에서 발생 가능한 최악의 누출, 화재, 폭발, 사고 시나리오를 도출하고, 사고 발생 가능성과 인체, 주변 시설 피해 영향 분석을 하여 안전성을 검토하고자 한다.

• 한국기계가공학회지
• /
• 제17권6호
• /
• pp.158-163
• /
• 2018

Major producers have already built compressors since World War I and have been monopolizing all domestic and overseas markets based on the accumulated technology, and the dependency of the manufacturers over the entire industry is deepening. Therefore, it is expected that the technological gap with developed countries will be larger without development of the related technology. Therefore, it is necessary to develop a unique technology for a new type of high efficiency compression system. In this study, we present localization of Hydraulic Compressor which can meet the technical trends such as cost reduction, efficiency improvement, environmental friendliness, wide operating range, low capacity / high capacity compatibility, size reduction, easy operation and easy maintenance.