## 1 Introduction
[PERSON] and [PERSON] [10] suggested a solar-assisted biomass-based tri-generation system to provide domestic energy demands and studied from the perspectives of thermodynamics and sustainability. In their proposed combined system, gas and steam turbines are considered as the main power generation systems, while the chiller and an auxiliary heat exchanger exploit the thermal energy content of the effluent. They investigated the influence of some decision parameters on the performance of the system in the summer/winter conditions as well. Their results revealed that the pressure ratio of the air compressor leads to the system performance optimizing while the performance of the system has a linear relation with the gas turbine inlet temperature and cold end temperature difference within the air heater. Performance optimization of an integrated solar combined cycle system which generates 400 MW power from the exergoeconomic perspective is performed by [PERSON] and [PERSON] [11]. Considering the sum of the initial cost rate and the exergy destruction cost rate as the objective function, optimum results showed a decrease of 11% in the total cost rate. In addition, the cost of electricity generation in gas turbines and steam turbines in the optimum case were 7.1% and 1.17% lower than the base case design, respectively. Moreover, parametric study was performed to determine the effect of different parameters on the system performance. [PERSON] et al. [12] investigated a municipal waste-driven tri-generation (cold, heat, and power) system and assesses how this solution helps for easier integration of energy sectors from the view of thermodynamic, thermoeconomic, and thermoenvironmental perspectives. Their results of the assessments showed that the proposed trigeneration system may effectively operate in any energy systems with simultaneous cold, heat, and power demands. [PERSON] et al. [13] presented the effect of changing the number of pressure levels of heat recovery steam generator on the exergy efficiency of the combined cycle. They modeled three types of combined gas turbine cycles. In one model, a gas turbine with a two-pressure heat recovery steam generator was used and in the other two models, a gas turbine with a three-pressure heat recovery steam generator (with and without preheaters). The results showed that increasing the number of pressure levels in the heat recovery steam generator reduces the exergy loss in the heat transfer process of the cycle and the sensible increase in the exergy efficiency of the whole cycle. The results also showed that the best performance of heat transfer from the outlet gas is related to the three-pressure combined cycle with preheater. From an economic point of view, their results also showed that increasing pressure levels in the heat recovery steam generator has economic justification. [PERSON] et al. [14], simulated and optimized a multipurpose cogeneration system consisting of a gas turbine, a dual-pressure steam Rankine cycle, an absorption chiller cycle, a power generation cycle and an ejector coolant, a heat exchanger that produce domestic hot water and electrolyzer. The system is designed for the simultaneous generation of power, cooling, hot water and hydrogen, they considered exergy efficiency and overall cost function (including fuel costs, equipment purchases and maintenance costs, exergy destruction costs, and environmental costs caused by carbon dioxide emissions) as optimization objective functions. Finally, parametric analysis was performed to investigate the change of design parameters on the relevant objective functions. An exergy and economics comparison between simple Brayton gas cycle with the solar collector and the combustion chamber as well as optimization is made by [PERSON] et al. [15].