[논문]열병합 발전소의 구성안별 성능 평가 방안 - 플랜트 열성능 및 단순화 발전단가 분석

김승진; 최상민

doi:10.15231/jksc.2013.18.3.001

열병합 발전소의 구성안별 성능 평가 방안 - 플랜트 열성능 및 단순화 발전단가 분석
Performance Evaluation of Combined Heat and Power Plant Configurations -Thermodynamic Performance and Simplified Cost Analysis 원문보기

한국연소학회지 = Journal of the Korean Society of Combustion, v.18 no.3, 2013년, pp.1 - 8

김승진 (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) , 최상민 (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)

Abstract ▼ AI-Helper

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).

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문제 정의

Especially, to compare different types of CCPPs having different objectives, it is necessary to suggest a performance evaluation method that would accommodate the different uses intended for CCPPs. The objective of this study was to suggest a methodology to evaluate different types of CCPPs and select the best one corresponding to the use purpose of a plant, through the proper performance evaluation. To determine the important design considerations, this study focused on thermodynamic performance of subject CCPPs having mixed purposes.

가설 설정

2) Thermodynamic efficiency cannot be an absolute criterion for comparing the performance of combined cycle power plants with different purpose and configurations.
4) The suggested method for design of combined cycle power plants is regarded as reasonable for application to commercial power plants.
4 displays the options available using a gas turbine in a combined heat and power system. In this study, the area of the heat exchanger units in the HRSG, gas turbine and steam turbine were fixed, and at the same time, the efficiency of each component was considered. Table 2 represents the electricity and heat generation cost of six cycle-configurations of combined heat and power plants with a 14% fixed charge rate, 100% capacity use rate, and with operating and management costs included in fixed costs.

제안 방법

2). Furthermore, the simple electricity and heat generation costs which could provide criteria for cycle selection, were also derived and evaluated.
In this study, three types of plants selected for case study were subjected to analyses of efficiency, based on the first law of thermodynamics(see Fig. 1 and Table 1). Fig.
The thermodynamic analysis of different types of gas turbine combined cycle power plants was executed. Power and heat generation rates, and the generation costs of various cycle configurations were derived in order to determine a set of optimization criteria for design of gas turbine combined cycle power plants. The results including economic evaluation were derived for simpler models than real combined cycle power plants.
In this study, to suggest the performance evaluation criteria for CCPPs, various evaluation factors including thermal efficiency were applied to three different commercial power plants. Then, thermodynamic and economic analyses were conducted on six different cycle configurations of plants with fixed gas turbines and steam turbines.
Since the operation mode of Type 2 is related to the cycle configurations, for a detailed analysis of this study, analysis in various operation modes(back pressure mode and condensing mode) should be additionally considered. Therefore, the analysis will include not only the three different types of power plants, but also different configuration cycles of the target CCPPs.
In general, when power plants are designed, if cost factor is the limiting condition among several designs, the optimized design is the plant with the highest efficiency, which does not go over the project budget. This study was focused on electricity and heat generation costs of six different cycle configurations of combined heat and power plants(Type 2) consuming relatively large amounts of steam, with fixed gas and steam turbines as shown in Fig. 2. The cost for generation of 1 kWh of electricity was figured out using Eq.
The objective of this study was to suggest a methodology to evaluate different types of CCPPs and select the best one corresponding to the use purpose of a plant, through the proper performance evaluation. To determine the important design considerations, this study focused on thermodynamic performance of subject CCPPs having mixed purposes. The heat and electricity generation costs were derived from different combinations of system configurations with fixed gas and steam turbines.

성능/효과

In Eq. (6), the operating cost is considered with assumptions that operating cost is 25% of fuel cost in general.

후속연구

These modes of operation are selected according to seasonal, regional, and customer demands. Since the operation mode of Type 2 is related to the cycle configurations, for a detailed analysis of this study, analysis in various operation modes(back pressure mode and condensing mode) should be additionally considered. Therefore, the analysis will include not only the three different types of power plants, but also different configuration cycles of the target CCPPs.
Also, it can be extended by being applied to new type of power plant such as power generation with carbon capture unit. This study suggested the need of different point of view to evaluate performance of power plant, and further study will proceed about suggestion of integrated process in power plant design considering objectives of system.

참고문헌 (16)

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상세보기
N. Ravi Kumar, Dr. K. Rama Krishna & Dr. A. V. Sita Rama Raju, "Performance simulation of dual pressure HRSG in combined cycle", Energy Engineering, Vol. 104, Issue 1, 2007, pp. 64-78.
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상세보기
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상세보기
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상세보기
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상세보기
T. Srinivas, B. V. Reddy, A. V. S. S. K. S. Gupta., "Parametric simulation of combined cycle power plant: A case study", Int. J. Thermodynamics, Vol. 14, No. 1, 2011, pp. 29-36.
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R. W. Fisk and R. L. VanHousen, "Cogeneration application considerations", Technical Report GER- 3430F, GE Power Systems, Newyork, 1996.

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열병합 발전소의 구성안별 성능 평가 방안 - 플랜트 열성능 및 단순화 발전단가 분석
Performance Evaluation of Combined Heat and Power Plant Configurations -Thermodynamic Performance and Simplified Cost Analysis 원문보기

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열병합 발전소의 구성안별 성능 평가 방안 - 플랜트 열성능 및 단순화 발전단가 분석 Performance Evaluation of Combined Heat and Power Plant Configurations -Thermodynamic Performance and Simplified Cost Analysis 원문보기

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Performance Evaluation of Combined Heat and Power Plant Configurations -Thermodynamic Performance and Simplified Cost Analysis 원문보기

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