Akademik Veri Yönetim Sistemi
15th International Exergy, Energy, and Environment Symposium (IEEES-15), 19 - 22 Aralık 2024, ss.75-80, (Tam Metin Bildiri)
In this study, an exergoeconomic approach is applied to a trigeneration system operated by solar energy for generating electricity, cooling, and hydrogen for a self-sustained community. It is aimed to evaluate future improvement methods, considering the system's performance and economic viability. Exergoeconomic analysis uses the Specific Exergy Costing (SPECO) method, while the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) reveals Multiple Criteria Decision Analysis (MCDA) for optimization. A crucial finding is that system modifications should raise the system's lifespan and annual operating time while simultaneously reducing the financing cost. In addition, the efficiencies of heliostats, turbine, HRSG and electrolyzer are should be increased because 37%, 23%, 21%, and 18% of the total exergy is destroyed in them, respectively. Considering the calculated fc value (45.49%), increasing the efficiency of heliostats is a top priority. On the other hand, it should be preferred to reduce capital investments without reducing the efficiency of other system units, which have higher fc values in the range of 60%–90%. Additionally, although cost rates ascend linearly as a function of capital expenses and interest rates, they also fall drastically over the duration of the system's lifetime and yearly operation. If the lifetime can be increased to 40 years, the total cost rate can be lowered logarithmically minimum to 0.084 $/h. Furthermore, if the yearly operation time can be increased to 3000 hours, the cost rate minimum can be lowered to 0.030 $/h.