에너지 시스템에 대한 성능 및 비용의 최적화 수식

Thermoeconomics, or exergoeconomics, can be classified into the three fields: cost allocation, cost optimization, and cost analysis. In this study, a new cost optimization methodology for energy systems is proposed. Conventional optimization formula can accomplish only cost or only performance. However, the proposed formula can accomplish the cost and performance at the same time. The formula is composed of fuel cost, capital cost, and overall system efficiency, which is very simple and clear. That is, the number of the proposed equation is only one, and it is developed with a wonergy newly introduced in this paper. The wonergy is defined as an energy that can equally evaluate the worth of each product. Any energy, including enthalpy or exergy, can be applied to the wonergy and be evaluated by this equation. To confirm its validity, the optimization of the CGAM problem was analyzed. Exergy is generally recognized as the most reasonable criterion in exergoeconomics. From the results of optimization using the suggested formula, however, both of exergy and enthalpy were reasonable. Therefore, we conclude that various forms of wonergy should be applied to the analysis of optimization.