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設備投資의 經濟性 評價方法에 關한 硏究 : 發電設備 中心으로 focused on the Electric Power Equipment
李德基,吳世好,金貞植 청주대학교 산업과학연구소 1990 産業科學硏究 Vol.8 No.-
In this study, various methods such as payback period method, discount cash flow method(DCF), levelized of electricty method(LCE)are reviewed to understand the economic evaluation associated with the power plant investment. For DCF method, the interal rate of return method(IRR), net present value method(NPV), and profitability index method(PI) are considered. All the evaluation methods stated here are based upon the concept of present value. In other words, all the future values predicted are converted into present values. By the way, each method for economic evaluation has its own characteristics. Therefore adoption of each of them in evaluating equipment investment project results in many problems. Hence combination & modification of them are required to perform more accurate evaluation about investment project. Especially in case of electric power equipment the establishment of better economic evaluation methods based on classical methods is indispensable. As a case study economic evaluation for the construction of the fluidized bed combusion power plants with different capacities, witch utilize low-grade anthracite of Chungnam coal field, was performed using the levelized cost of electricity method, and the results are as follows ; 1) The most significant factor of all the costs inclued in the generation cost is fuel cost, and then was capital cost, fixed cost and c&m cost, in turn. 2) With the fuel cost of 25,000w/ton, the discount rate of 9%, the inflation rate of 0%, in case of the electricty generation capacity of 40MW, the electricty generation cost is the lowest. 3) The result of the sensitivity analysis shows that the inflation rate IS the most critical factor in the determination of the generation cost. 4) The electricty-generation cost is predicted to be much lower if the low-grade coals are sufficiently supplied at low prices and the low inflation rate is used by virtue of the stabilization of economics.