• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.495-496
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• 2011

• Resources Recycling
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• v.25 no.4
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• pp.80-86
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• 2016

To investigate the current status of aggregate industry in Korea, the law of aggregate gathering, the law of forest management, the aggregate statistics of demand and supply in recent years, and market price of aggregate were reviewed. It is conformed that the forest aggregate industry is developing year by year and leading the industry. In addition, in order to well understanding about aggregate industry, the production system and process of the Whaseong forest aggregate quarry were introduced.

• 월간 기계설비
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• s.304
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• pp.76-85
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• 2015

최근들어 전력 소비량이 크게 늘어나자 정부는 원활한 전력 공급을 위해 제5차 및 제6차 전력수급계획을 세우고 2022년까지 발전소 건설을 목표로 함에 따라 전국 곳곳에서 발전소 건설공사가 한창이다. 이 중 PMP(주)가 경기도 파주시에 건설 중인 장문 천연가스발전소는 1,820MW 규모의 천연가스복합화력 발전소다. 지난 6월 1일 착공에 들어가 오는 2017년 3월 말까지 완공될 예정이다. 장문 천연가스발전소는 제5차 전력 수급기본계획에 따른 국가 기간산업으로 수도권 북부지역에 전력을 충분히 공급함은 물론 주변지역의 대규모 산업단지와 기업체에도 공급 가능성이 큰 대규모 발전소다. 또한 SK그룹은 풍부한 발전소 운영경험을 기반으로 고효율 발전설비를 갖춤으로써 전력시장에서 높은 경쟁력을 확보할 수 있을 것으로 기대하고 있다. (주)세일엔지니어링(대표 오세현)은 장문 현장에서 #11, #12의 2기 HRSG(Heat Recovery steam Generator) 설치공사를 SK건설(현장소장 이원기)로부터 하도급 받아 시공하고 있다. 본지는 2017년 3월 말까지의 완공을 목표로 무결점 시공에 올인하고 있는 (주)세일엔지니어링의 주남식 현장소장을 만났다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.559-560
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• 2021

본 논문에서는 인공지능, 사물인터넷 등 4차 산업혁명 기술을 기반으로 생산 업체와 공급 업체 간의 공급망의 가시성, 안전성, 효율성 향상을 위한 물류 표준을 준수하며 고도화 및 지능화된 스마트 SCM 솔루션을 제시하고자 한다. 이를 위해 사물 인터넷, 인공지능 기술을 기반으로 공급망의 가시성, 안전성, 효율성 향상을 위한 물류 표준을 준수하며 고도화되고 지능화된 효율적인 자동 발주 솔루션을 제시한다. 자동 발수 솔루션은 협력업체와의 생산계획정보, 발주정보, 납품정보, 품질판정정보, 재고현황 등의 제품 데이터를 실시간 공유하는 웹 기반 솔루션이다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.991-994
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• 2007

Since the year of 2003, the overseas plant market has grown by an average of 6% per year. It is because of the increase of oil-money, economic growth of BRICs, and the result of heavy competition among the countries which demands a great amount of resources for the purpose of resource securing. Such a situation is expected to be continued for a while. The procurement is one of critical functions for successful completion of a plant project. For effective procurement, it is required to manage vendor's information efficiently. But most of the vendor management systems deal with simple general information and performance data about vendors. In this sense, this paper proposes a vendor management system which can be used within a decision-making system. The system uses existing DB and makes the close relationship with the vendors. This paper will also reduce risks and difficulties in the process of selecting the proper vendors and will increase efficiency of procurement process in electronic bidding between companies.

• Journal of the Korean Institute of Gas
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• v.26 no.6
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• pp.24-29
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• 2022

This paper is a purpose to Analyze and study the failure examples for a engine oil leakage of camshaft bearing seal, poor contact by computer connector fin damage and vaporizer inferiority on LPG automotive. The first example, when the researcher disassembled the cylinder head of engine to establish the cause for oil leakage, he confirmed the engine oil leakage by damaged between the engine intake camshaft bearing and seal part. The second example, the connector fin of power source line that control the starting of a car supplied with engine computer. As a result, it found the fact that the engine operation stopped because of cutting of the power source by connector fin damage. The third example, it verified the engine incongruity phe cutting of the power source by connector fin damage. The third example, it verified the engine incongruity phenomenon as thd gas didn't flow the vaporizer by foreign substance deposit. Finally, it supplied a small quantity gas from vaporizer to mix. As the computer controlling mix opening condition supplied a air as opening signal, the air and fuel became rarefied state. it knew that the engine didn't produce prpper power. Therefore, a car have to throughtly inspect not in order to arise the failure symptoms.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.3
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• pp.1664-1670
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• 2015

As journal bearing has a sliding motion between the shaft and bearing with lubricating oil, it produces a hydrodynamic lubrication condition. Journal bearing can receive a large force because it takes a distributed load at the large friction face. As the oil groove or oil hole is made in the journal bearing surface for the journal bearing smoothly working under a hydrodynamic lubrication condition, sufficient lubricating oil is supplied through the clearance of journal bearing. The performance of the journal bearing is changed according to the shapes, sizes and positions of an oil groove. In this paper, the flow rate according to the oil groove shapes (triangle, semicircle and rectangle) among the various oil supply conditions was measured. The shape that discharges the highest flow rate was observed and the groove shape of optimal performance for the journal bearing was determined. The results showed that the flow rate increases with decreasing operating temperature, the influence of temperature on the flow rate decreased with increasing rotational speed, and flow rate in the triangular groove shape was greater than in other shapes.

• The KSFM Journal of Fluid Machinery
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• v.20 no.2
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• pp.53-62
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• 2017

In this paper, the effect of oil conditions in rotor dynamic behaviors of a FFRB (Fully-Floating Ring Bearing) is investigated. Through the characteristic of a FFRB has two films, it has several advantages such as less friction loss and better stability over a wide speed range. However, it is difficult to supply a oil to the inner film. Thus, turbocharger makers have been paid significant attention to the lubrication of a FFRB because of its importance. This work focuses on the influence of oil inlet pressure and temperature. The methodologies of computational simulation and experimental test were used to estimate the rotor dynamic behaviors. In experimental test, the single-scroll turbocharger for the 1.4L diesel engine was used. The results show that the oil inlet pressure and temperature will place considerable influence on the rotor response. Oil conditions affect RSR (Ring Speed Ratio) which is cause of sub-synchronous vibrations, which also cause of oil whirling and whip even a critical speed. At higher speed range, the phenomenon of self-excited vibrations which is cause of instability of fluid whirl is investigated through the orbit shapes that consist of small orbit and large amplitude orbit. It is shown that some performance of a FFRB can be controlled by the conditions of oil supply. Finally, it was revealed that the oil induced operating conditions will strongly affect the turbocharger rotor dynamics behaviors.

• Land and Housing Review
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• v.7 no.4
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• pp.207-215
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• 2016

The purpose of this paper is to explore ways in the construction of Apartment-type factories in the public sector. Recently the markets of Apartment-type factories are driven by the private sector as high quality, high price and supply of in the form of office, these construction trends are different from the original aim of introduce policy of Apartment-type factories which supply production spaces in the city to small capital enterprises. We analyzed the architectural characteristics of Apartment-type factories in Korea, the prospect of their future construction trends and the survey results targeted to small enterprises. In the results of this survey, we grope for the direction for construct Apartment-type factories in the public sector. The Apartment-type factories constructed by the public sector are appropriate supply for manufacturing plants and sale rather than lease form to complement the private market. To optimize economically and functionally for manufacturing activities, the design space in the internal and external spaces is required in order to supply more affordable. Route design, especially considering parking, unloading and warehousing of merchandise, and logistics should be differentiated from the Apartment-type Factories constructed by private sector.

• 한국신재생에너지학회:학술대회논문집
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• 2010.06a
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• pp.116.1-116.1
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• 2010

저급 연료원인 오일샌드는 아스팔트와 같은 중질유를 10% 이상 함유한 모래 또는 사암으로서, 겉으로는 시커먼 흙이나 모래처럼 보이나 내부에는 bitumen, 모래(점토) 및 물 등이 광물질 70~80%, bitumen 10~18%, 물 3~5% 정도의 비율로 혼합되어 있는데, 가열 또는 용매 추출 방식으로 오일샌드에 포함되어 있는 bitumen을 분리하여 정제하면 원유를 생산할 수 있으므로 고유가 시대의 대체에너지원으로 세계적인 석유회사들이 개발을 진행하고 있다. 따라서, 본 연구에서는 이러한 저급 연료원인 오일샌드 bitumen의 활용기술 개발을 위하여 기초특성 분석 결과 bitumen과 가장 유사한 특성을 가지는 것으로 파악된 중질잔사유를 대상으로 가스화를 통한 액체연료 전환을 위해 고점도 시료공급장치, 가스화기, 집진장치, 탈황장치, 수성가스 전환장치, 합성가스 압축장치, DME 전환장치 등으로 구성되는 시스템을 구축한 후 시험을 진행하였다.