• Journal of the KSME
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• v.24 no.3
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• pp.203-213
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• 1984

도시쓰레기 소각처리는 이미 100년전에 유럽지역에서 시작되었고 원래 환경보존 및 공해방지목적에 연유되어 발전되어 왔다. 그후 국제적 에너지자원의 재평가가 중요시됨에 따라 1960년도를 전후하여 소각에서 발생되는 잉여열을 활용하는 장치개발 및 플랜트의 건설이 유행되어 기저부하로서 쓰레기소각로를 이용한 열병합지역난방 시스템이 유럽, 일본 등지에서 상용화되고 있다. 이와 같이 세계적인 추세와 발맞추어 국토가 협소하고 환경오염, 에너지 보존자원이 부족한 우리나라의 입장은 도시쓰레기 처리문제는 해결되어야 할 가장 중요한 당면과제로 대두하고 있다.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.8 no.3
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• pp.184-190
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• 1979

제 1 부에서는 지역난방배관강의 특리성을 설명한다. 난방부하에 있어서 피이크치는 별로 자주 사용되는 것이 아니며 이에 소요되는 에너지는 소량이므로 최소의 자본투자를 하도록 하여야 한다. 지역난방배관강의 건설기간동안 설비용량중의 많은 부분이 사용되지 않은 상태로 나타나 건설기간중의 이자를 고려할 때 투자비를 증가시키게 된다. 건설기간동안에는 특히 투자가 가급적 적게되도록 하여야 한다. 제 2 부에서는 동력발생과 열발생에 있어 가장 경제적이 되도록 간단하고 실용적인 방법을 설명한다. 에너지함량을 사용하여 가장 판단한 방법으로 각 부문에 대할 에너지의 환산을 할 수 있다. 이로서 열병합발전방식으로부터 열을 발생시키는 경우와 열만을 생산할 때의 연간 생산비를 계산할 수 있다. 전기에너지에 대한 수입을 고려하고 최소현가를 결정할 수 있다. 제 3 부에서는 난방망의 증가를 포함하여 지역난방플랜트의 단계적 확장에 대하여 설명한다.

• Journal of Energy Engineering
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• v.27 no.2
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• pp.1-13
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• 2018

The proportion of natural gas-fueled power generation is expanding due to the change of domestic energy policy pursuing reduction of dust and increasing clean energy consumption. Natural gas fuels used for the combined-cycle power plants and the district-heating power plants are operated at high temperature and high pressure in the fuel supply system. Accidents due to leakage of the gas such as fire and explosion should be prevented by applying risk management techniques. In this study, risk assessment was performed on the natural gas fuel supply system of a combined power plant based on the API RP 581 RBI code. For the application of the API RBI code, lines and segments of the evaluation target system were identified. Operational data and input information were analyzed for the calculations of probability of failure and consequence of failure. The results of the risk assessment were analyzed over time from the initial installation time. In the code-based evaluation, the gas fuel supply system was mainly affected by thinning, external damage, and mechanical fatigue damage mechanisms. As the operating time passes, the risk is expected to increase due to the external damage caused by the CUI(Corrosion Under Insulation).

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.177-182
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• 2009

The purpose of this study is to investigate planning of urban energy supply systems configuration and operating conditions for the district heating and cooling system using combined heat and power system. Generally the district heating and cooling system has been known to one of the effective way for energy saving, cost reduction and demand side management of energy. Economical analyses were carried out and operating characteristics for some systems were examined in terms of GER factor which represents to the ratio of gas and electricity costs. Rates of the energy consumption and the $CO_2$ emission were compared from the system configuration of the energy supply system with new district cooling system with the conventional one.

• Journal of Energy Engineering
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• v.9 no.2
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• pp.95-101
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• 2000

The purpose of this study is to find plant utilities capacity for economical operation of combined heat & power by reducing energy expenditure. Using a numerical simulation program CHPSIM, a comparative analysis of additional heat expenditure (AHE) of combined heat & power plant in relation to size of district heating has been performed within the comparison of the difference capacity of gas turbine and steam turbine . As a results, if a 105.2MW gas turbine (exhaust gas temp ; 540$^{\circ}C$) installed in CHP plant can reduced 17-18% yearly the AHE than 75MW gas turbine (520$^{\circ}C$) installed. If a 130-150MW gas turbine (560-580$^{\circ}C$) installed, can reduced 34.7-35.8% of the yearly AHE.

• Journal of the Korean Society of Combustion
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• v.18 no.3
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• pp.1-8
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• 2013

Thermodynamic and economic analyses of various types of gas turbine combined cycle power plants have been performed to establish criteria for optimization of power plants. The concept of efficiency, in terms of the difference in energy levels of electricity and heat, was introduced. The efficiency of power and heat generation by power plants with other purposes was estimated, and power generation costs were figured out for various types of combined heat and power plants(i.e., fired and unfired, condensing and non-condensing modes, single or double pressure HRSG).

• Plant Journal
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• v.9 no.3
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• pp.48-52
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• 2013

In this study, the internal flow field of SCR Denitrification Plant was simulated by using Computational Fluid Dynamics(CFD). In order to analyze the uniformity of flow field, an interpretation on the pre-existing facilities was performed, and some moot points were identified and compensated through this analysis. The compensatory methods include the installation of the Porous Plate below the bottom of the Baffle to create uniform flow and also, and the Guide Vane was also placed in the bend of pipe to guide the flow uniformly. Lastly, the Baffle was installed to deduct equalized space distribution of the air flow, initially flowed into the SCR Plant.

• Journal of Energy Engineering
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• v.10 no.4
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• pp.363-369
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• 2001

Process design and performance evaluation were made for medium-size gasification combined/cogeneration plant. Based on the designed plant process configuration, the effects of $NO_x$ reduction techniques on the $NO_x$ emission, the power output, the efficiency and the stability of plant are investigated by applying various $NO_x$ reduction methods such as unsaturated/saturated nitrogen injection and fuel saturation of gas turbine combustor. The $NO_x$ reduction by nitrogen injection is more remarkable than that by fuel saturation, and its effect can be more enhanced by using saturated nitrogen. In addition, the applications of $NO_x$ reduction techniques accompany the improvement of plant power output and efficiency with the decrease of $NO_x$ emission, while it can cause unstable gas turbine operation.

• 한국신재생에너지학회:학술대회논문집
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• 2007.11a
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• pp.445-448
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• 2007

석탄가스화 복합발전(IGCC)에서 석탄 가스화 기술이 전 공정의 성능에 큰 영향을 미치는 중요한 요소이다. 연료 및 산화제의 공급방식, 가스화기의 기본 구조, 벽면의 구성 방식, 용융 슬랙 및 생산되는 합성가스 배출 방식 등에 따라 가스화의 성능이 영향을 받는다. IGCC plant의 정확한 성능 해석을 위해서는 석탄가스화기 공정 모델의 정밀도를 높일 필요성이 있다. 기존의 열병합 발전 사이클 해석에서 적용되었던 열 및 물질정산과 평형계산 방식을 통하여 석탄가스화기 공정을 해석하는 방법을 확인, 정리하고 이를 개선하기 위한 절차 및 방안을 제시하고자 한다. 가스화기 내부 공정을 크게 탈휘발과 가스화의 단계로 구분하여 가스화기 출구조건을 예측하였으며, ASPEN PLUS를 이용한 공정해석을 실시하였다. 가스화기 출구에서의 합성가스는 주생성가스인 CO, $H_2$를 위주로 하여 조성을 얻을 수 있고, 그 결과들을 선행연구들과의 비교를 통하여 가스화기 모델의 분석을 실시한다. 그리고 가스화기 해석의 정밀도를 높이기 위한 향후 고려될 가스화기 모델에 관하여 논의한다.

• Plant Journal
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• v.12 no.4
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• pp.32-36
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• 2016

In this study, a penalty cost appropriation methodology for CGAM performance acceptance test was suggested. As the result of CGAM performance test, there were 0.31% decreases in electricity output, 0.39% decreases in heat rate on electricity output, 0.31% increases in heat output, and 0.23% increases in heat rate on heat output. As the result of penalty cost appropriation for above performance, the penalty cost was calculated as -$20,837 in electricity output, -$25,930 in heat rate on electricity output, +$10,340 in heat output, and +$7,715 in heat rate on heat output. Each penalty is appropriated as above fore kinds, however the total penalty should be determined as how to combine above fore kinds of penalty. In our calculation, the minimum total penalty was -$18,215 and the maximum total penalty was -$46,767. The methodology of total penalty appropriation should be determined in the contract between ordering organization and construction firm, and we can understand that it is very important.