• 대한기계학회논문집B
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• 제35권9호
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• pp.961-967
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• 2011

본 연구에서는 13A 가스기기의 새 가스호환성 판정법을 개발하고자 하였다. 호환성 판정법 개발의 원칙은 세 가지로서, 1) 웨버지수 외에 가스조성 영향을 대표할 수 있는 인자의 도출, 2) 우리나라 가정과 업소에 보급된 모든 종류의 제작사별 가스기기(예혼합 가스기기 포함) 시험, 3) 가능한 한 간단한 판정법 개발이다. 이러한 원칙하에 30대의 대표성 있는 가스기기에 대하여 가스호환성 실험을 하였고 그 결과 웨버지수-비중 형식의 간단한 2차원 판정법(도표)을 개발하였다. 본 호환성 판정법은, 기존 호환성 판정법과 달리 화염안정 영역이 좁은 예혼합 가스기기를 포함하며, 이로 인해 기존 호환성 판정법보다 가스호환성 영역이 좁은 것으로 나타났다.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 1995년도 추계학술발표회 초록집
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• pp.126-138
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• 1995

In order to study the gas interchangeability, a series of tests and analysis were conducted regarding to natural gas and gas mixture. Natural gas was selected as a reference and NG-LPG/Air mixture as a substitute gas. The major interest was placed on the determination of interchangeability limits for different mixing conditions. The parameters of Wobbe Index and Combustion Potential were employed in estimating the gas interchangeability, The limits obtained by analysis(AGA, WEAVER, KNOY, GILB) were compared with experimental results. The results estimated showed that the mixing limits of LPG/Air in proper conditions were found to vary with analysis and AGA is considered to be the most appropriate one.

• 법제연구
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• 제41호
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• pp.201-228
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• 2011

대법원은 97후2200에서 균등관계가 성립하기 위한 5가지 요건을 제시하였다. 이 중에서 세 번째 요건인 '치환자명성'이 특허요건 중 하나인 진보성을 판단할 때의 자명성과 같은 수준의 것으로 해석할 수 있는 것인지의 여부에 대하여 논쟁이 있다. 이들을 다르게 해석해야 한다는 입장에서는, 치환자명성 요건이 자명성 요건에 비하여 협소하다고 설명한다. 그리고 이들을 동일하게 볼 경우 특허발명에 대하여 진보성이 인정되지 않는 한 모두 균등영역에 포함되는 것으로 보게 되어 균등침해의 영역을 과도하게 확장하게 되는 문제가 있다고 한다. 반면에 이들을 같은 정도의 것으로 해석해야 한다는 입장에서는, 특허발명으로부터 용이하게 실시할 수 있는 기술 즉, 특허발명에 대하여 진보성이 없는 영역에 속하는 확인대상발명은 모두 균등침해에 해당하는 것으로 보아야 한다고 주장한다. 또한 균등론상 치환자명성과 진보성의 자명성을 서로 다르게 해석할 경우 특허법이 작용할 수 없는 소위 '회색영역'이 존재하게 되는 문제가 있다는 점을 지적한다. 이러한 견해의 차이는 권리범위확인 또는 균등론에 의한 침해 여부를 판단함에 있어서 상반되는 결과를 가져올 수 있다. 즉, 치환자명성 요건을 자명성 요건보다 좁게 보는 경우는 이들을 동일하게 보는 경우에 비하여 특허권의 권리범위를 좁게 해석하기 때문에 회색영역에 속하는 확인대상발명에 대하여 침해를 부인하게 된다. 그러나 반대로 이들을 동일하게 보는 경우 회색영역은 사라지고 확인대상발명은 균등론에 의하여 침해의 영역에 속하게 된다. 이 논문은 이러한 문제를 해결해 보고자 하는 시도에서 출발한 것이다. 이를 위하여 특허요건의 진보성 판단과 균등론의 치환자명성 판단을 각각 검토하고, 이들을 동일하게 보는 경우와 다르게 보는 경우를 기술혁신의 경제학적 관점에서 서로 대비한 결과 동일하게 보는 것이 합리적이라는 결론을 얻을 수 있었다.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2012년도 제44회 KOSCO SYMPOSIUM 초록집
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• pp.89-91
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• 2012

In this study, an investigation into the gas interchangeability and combustion characteristics of natural gas with various compositions was performed. In order to suggest the appropriateness of gas interchangeability using the specific gravity(SG) and the Wobbe index(WI) values, combustion characteristics, which include incomplete combustion and flame lifting, were measured and observed for the upper and lower limits using the gas-oven as a domestic partial-premixed type appliance and the condensing boiler as a domestic premixed type appliance.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2007년도 제34회 KOSCO SYMPOSIUM 논문집
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• pp.69-75
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• 2007

In this study, the difference of flame stability zone for natural gases from producing districts was studied experimentally using a new type of flame stability diagram. The similarity of stable flame zone between a domestic appliance and an interchangeability test(IT) burner is also examined. As a result, the stable flame zones expressed by limits curves of flame lifting and yellow tipping show the similar results in a domestic gas range and IT burner. Furthermore, IT burner can reproduce the flash back phenomena and show the distinct difference of fuel type as the burner diameter is increased. To suggest the new type of flame stability diagram in the respect of fuel interchangeability, the air flowrate and Wobbe fuel flowrate were adopted as axis coordinates. It can be identified that the new diagram can provide the useful information on the difference of flame stability zone, heat input rate and air-fuel ratio when a fuel is altered to other fuels under the identical operating conditions. Finally, the stable flame zones for natural gas of 6 type are compared, and the detailed information to use as the interchangeability fuels of standard natural gas is provided using the new type of flame stability diagram.

• 한국연소학회지
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• 제12권1호
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• pp.38-47
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• 2007

The diversification of import districts of natural gas is trying to prepare an increase in the demand and price. The interchangeability of natural gases should be examined prior to supply to gas appliances, although compositional differences among natural gases are not large. The object of this study is to investigate numerically the thermodynamic and transport properties as well as information on combustion of 6 natural gases. Comparing the properties of BOG1 with those of standard gas, the maximum differences of heating value, Wobbe index, air-fuel ratio, and specific heat are 10%, 4%, 10% and 5.54%, respectively. That is, the BOG1 is required careful application. However, all gases except for BOG1 show the similar properties with standard gas. Finally, the combustion information such as flame temperature and burning velocity are examined. These results will provide the useful information related to the interchangeability of various natural gases in practical combustion appliances.

• 한국연소학회지
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• 제13권3호
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• pp.1-8
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• 2008

A flame stability diagram in a partially premixed flame is typically expressed using the axis coordinates of heat input rate and equivalence ratio. These diagrams are inadequate for identifying changes in combustion conditions and flame stability when a reference fuel is substituted with other fuels under identical operating conditions. This study proposes a new type of diagram and validates it experimentally. In this new diagram, the axis coordinates are air flow rate and Wobbe fuel flow rate, defined as the fuel flow rate multiplied by the square root of the relative density. The diagram was validated in trials using various fuels, including $CH_4$, $C_{3}H_{8}$, and LFG-$C_{3}H_{8}$ mixed fuels, in a domestic gas-range and an gas interchangeability test burner. The results of these trials show that the new diagram can provide information useful for assessing gas interchangeability of combustion conditions and flame stability when one fuel is substituted with another under identical operating conditions.

• 제어로봇시스템학회논문지
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• 제2권2호
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• pp.127-133
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• 1996

This paper represents a new powertrain simulation methodology using the object-oriented programming paradigm. The advantage of the object-oriented is the module interchangeability and simulation flexibility. Powertrain subsystems and controller modules are implemented using the MEX files in MATLAB Simulink in this paper, preserving module interchangeability. Currently, the required CPU time on a 75MHz Pentium PC is about three times the real time. It is anticipated that the "Automotive Powersystem Toolbox" being developed in this research would be of much utility in designing subsystem controllers as well as in designing subsystem mechanicals.chanicals.

• 한국병원경영학회지
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• 제21권1호
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• pp.43-50
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• 2016

The public medical centers are required to make efficient and profitable operation. The efficiency is usually measured by DEA(data envelopment analysis), and profitability is measured by medical income rate. But DEA is measured by relative, not absolute value. So, profitability rate is used alternatively for DEA. This study want to analyze the interchangeability between DEA ranking and medical income rate ranking among public medical centers. The return on total assets is same ranking with DEA on bed number, employee number and total asset, but 60-70% relationship with DEA on bed number and employee number, as input resources. The operating margin is similar ranking with DEA on bed number and employee number, but 50-60% relationship with DEA on bed number, employee number and total asset, as input resources.

• 한국실내디자인학회논문집
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• 제15권2호
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• pp.21-28
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• 2006

The purpose of this study was to analyze the characteristics of Kinetic Architecture focused on case studies, categorize them and to research the possible applications of Kinetic Architecture. The results are as follow: first, the background of Kinetic Architecture is from the art, machine, nature and ancient architectures. Second, characteristics of Kinetic Architecture are deployability, modularity, lightweight, simplexity and interchangeability of parts. Third, the types of Kinetic Architecture are dynamically self-erecting structures, kinetic components, incremental architecture, mobile and disposable architecture. Finally, today the application cases of Kinetic Architecture are divided into the spital and skin part. The spital part is a temporary space, the multi-purpose spaces, housing, commercial spaces, and the educational spaces. The skin part offers functional(controling environments), artistic images through variation of materials and structural objects in the elevation.