• Title/Summary/Keyword: Price Processing

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The Effects of Various Swirl Flows on Pulverized Petroleum Coke Combustion (미분 석유코크스연소기에서 스월강도변화가 연소과정에 미치는 영향)

  • Cha, Chun Loon;Lee, Ho Yeon;Hwang, Sang Soon
    • 한국연소학회:학술대회논문집
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    • 2014.11a
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    • pp.297-299
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    • 2014
  • Petroleum coke has high heating value and low price. Due to the steadily increasing demand for heavy oil processing, the production volume of petroleum coke tends to be expanded. The high availability and low price of petroleum coke have been strongly considered as candidate fuel for power generation facilities. However the high carbon content, high sulfur content and nitrogen content of petroleum fuel are known to produce relatively large quantity of CO2, high NOx and SO2 emission. In this work, a series of numerical simulations have been carried out in order to investigate the effects of swirl flow intensity on combustion furnace, which is most important operating condition. Results show that the temperature distribution was spatially uniform at about 1600K but high temperature region are located quite differently depending on swirl number. In addition, numerical temperature data was compared with experimental temperature data and its temperature difference shows less than 10%. On the other hand, discrepancy between numerical and experimental emission data were slightly large with necessities of improved emission model.

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High strength's union of mass layers metal bearing (고강성 다층 메탈베어링의 접합)

  • 전재억;황영모;김수광;계중읍;김준안;하만경
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.792-795
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    • 2004
  • Despite is product that ship, vehicles, development equipment and Metal Bearing for plant equipment that is mass-produced by present domestic companies Cast White Metal Lining Bearing that is Bimetal Bearing standing 2 generation is accomplishing master and servant and this is foreseen to be used widely on industry whole in hereafter but Cast White Metal Bearing need minuteness processing, while price competitive power is depending on income from superior another thing area than itself manufacture already in advanced nation to lowdown that the technique is generalized widely, when take into account technology change aspect of industrial technology developing country, Go added value creation by deepening of price competition is judged to be difficult hereafter. Because domestic production and supply are wholly lacking almost in Metal Bearing Cladding that take advantage of these technology, Data-base about connection technology is weak with technique and Know-How for product. This research unites Back Steel and Aluminium Alloy different kind metal and make the Clad river studying technology about union of Gogangseong Dacheung metal bearing hereupon.

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A Study on the Systematization Design of Differential Transformer by using Analogical Interpretation (유추해석을 이용한 차동변압기의 계열화 설계기법 고찰)

  • 조경재;차인수;이권현
    • Proceedings of the KIPE Conference
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    • 1999.07a
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    • pp.218-221
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    • 1999
  • We introduce the systematization design method using similarity theory which is profitable in the compatability, the reduction of construction time and price. The design method can make us predict the characteristic experiment for the magnitude we desire as the expression equation applied continuously. We can induce the design sample the user demand with the verification of the data on optimum design previously. Therefore, in case of designing and developing the products, systematization design method is very useful for the standardization of the developed goods, compatability, the reduction of construction time and price. In this paper, we presented the analogical algorithms of systematization design using similarity theory, design factors and processing method of the restriction factors. Also, we analyzed the output voltage in terms of input voltage and displacement as choosing a differential transformer as the model.

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Firewood Plantation as an Alternative Source of Energy in the Philippines

  • Yao, Calixto E.;Bae, Ki-Kang
    • Journal of Forest and Environmental Science
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    • v.24 no.3
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    • pp.171-174
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    • 2008
  • The increasing price of liquefied petroleum gas (LPG) has forced many households to shift to firewood/charcoal in the Philippines, causing tremendous pressure on the dwindling forest. This transition is more obvious in the rural area where firewood price is almost half of that in the cities. Both problems on big demand for firewood and the pressure on our forest can be partly solved by going into firewood plantation. After all, the country has vast track of idle lands, both private and government lands, waiting to be developed. What the government can do are: a) aggressive promotion of firewood plantation, b) simplify further the old technology on establishing firewood plantation to encourage more farmers, c) improve charcoal processing and d) promote the use of efficient stoves. This write up discusses the need for firewood plantation, areas available for planting, where to plant in farms, what species to plant in a particular soil type/location for optimum growth, planting methods, harvesting, marketing, and the side lights on the ecological benefits derived from plantation aside from wood.

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A Case Study on Management Situations of Environment-friendly Farming of a Producers' Organization (생산자조직 단위 친환경농업 경영실태에 대한 분석)

  • Kim, Ho
    • Korean Journal of Organic Agriculture
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    • v.22 no.2
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    • pp.241-254
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    • 2014
  • This case study surveyed management situations of environmentally friendly farming(EFF) producers' organization and their main activities. Farmers are aging as an average age of 55-year old and producing fruit-bearing vegetables. The EFF did not increase farmer's income, however, price and income was stabilized more than that of conventional farming because of contract farming. Farm household liabilities are caused by purchasing agricultural machinery, materials and so on. Farmers of EFF have been also cultivating conventional farming, but they don't plan much conversion intention of conventional farming into EFF owing to lack of differentiated and stable market for their EFF products. And they are guessing that EFF income will increase a little. For increasing of EFF income, they think that it is necessary to reduce production cost, produce high quality production, develop processing foods, enlarge contract farming and so on.

A Study on Developing Mathematical Model for DSM Monitoring (DSM Monitoring을 위한 수리모형 개발에 관한 연구)

  • Kim, Sung-Il;Lim, Jae-Yoon;Chang, Seung-Chan;Kim, Chang-Seob;Kim, Jung-Hoon
    • Proceedings of the KIEE Conference
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    • 1997.07c
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    • pp.764-766
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    • 1997
  • This paper presents a DSM Monitoring Methodology which is able to evaluate the impact of DSM programs under processing. For an effective assessment of DSM programs, it is foremost necessary to examine the market characteristics on the specific end-use appliance according to the customer's adoption of DSM programs. The Proposed Monitoring system contains a diffusion process of high efficient end-use considering major factors of DSM impact such as, price, price elasticity and lifetime of end-use apparatus or appliance. The case study shows the propriety and necessity of DSM monitoring in order to diagnose the current state and provide a baseline of DSM policy

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Economic Analysis of Ecklonia cava Aquaculture Business (감태 양식사업의 경제성 분석)

  • Kang, Seok-Kyu
    • The Journal of Fisheries Business Administration
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    • v.44 no.2
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    • pp.69-81
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    • 2013
  • The purpose of this study is to examine the economic validity of Ecklonia cava aquaculture business for raising fishing people's revenue. The results of this study are summarized as follows: First, the production of Ecklonia cava is estimated about 251 ton or more in Jeju. Second, the distribution structure of Ecklonia cava is not established, but Ecklonia cava is traded much more through bio or processing corporation than through fisheries cooperative like other marine plants. Third, the price of Ecklonia cava should be at least 1,729 won per kilogram under 4.04% of capital cost for economic feasibility of Ecklonia cava aquaculture business. Finally, the results of sensitivity analysis show that there is economic feasibility of Ecklonia cava aquaculture business when the price of Ecklonia cava is more 2,500 won per kilogram and the capital cost is under 8.0%.

A Study on the Development of a PC Based Mini-PACS (PC 기반 Mini-PACS 개발에 관한 연구)

  • Kim, H.;Kim, D.Y.
    • Proceedings of the KOSOMBE Conference
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    • v.1996 no.11
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    • pp.61-64
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    • 1996
  • Currently many researches are going on a Picture Archiving and Communication System (PACS) which can handle a large number of image data very efficiently. However, the price of those systems are very expensive to a small and medium hospital. In this paper, we developed a PC based Mini-PACS at a low price with a high performance. The main components of the designed system are: Image processing and display for a diagnosis, Client/Server database management system, Multi-monitor display system, Connection through the World Wide Web with Common Gateway Interface.

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Methods of Separating Used Plastics for Recycling (폐플라스틱의 선별기술)

  • 윤여환
    • Resources Recycling
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    • v.6 no.2
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    • pp.12-21
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    • 1997
  • Plastics waste constitutes approximately 23% by volume of the municipal solid waste(MSW) generated in the U.S. each year, and have slow rate of degradation in the environment. Therefore, there is a great deal of public pressure to recycle plastics, and more than 100 million people participate in the curbside recycling programs. Despite the high level of public interest, only 3.5% of the plastic are recycled, which is substantially lower than the recycle rates of other materials such as paper fibers, glass, and iron. Although a large part of the reason is due to the low price of virgin polymers, which in turn is due to the low price of oil, it is possible to make the plastics recycling as a profitable business by developing advanced technologies. In this communication, various methods of separating pplastics from metals and from each other are discussed.

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Design and Fabrication of Micro Patterns on Flexible Copper Clad Laminate (FCCL) Using Imprinting Process (임프린트 공정을 이용한 연성동박적층필름(FCCL)의 마이크로 패턴 제작)

  • Min, Chul Hong;Kim, Tae Seon
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.12
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    • pp.771-775
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    • 2015
  • In this paper, we designed and fabricated low cost imprinting process for micro patterning on FCCL (flexible copper clad laminate). Compared to conventional imprinting process, developed fabrication method processing imprint and UV photolithography step simultaneously and it does not require resin etch process and it can also reduce the fabrication cost and processing time. Based on proposed method, patterns with $10{\mu}m$ linewidth are fabricated on $180mm{\times}180mm$ FCCL. Compared to conventional methods using LDI (laser direct imaging) equipment that showed minimum line with $10{\sim}20{\mu}m$, proposed method shows comparable pattern resolution with very competitive price and shorter processing time. In terms of mass production, it can be applied to fabrication of large-area low cost applications including FPCB.