## 1 Introduction
Moreover, a feasibility study on the application of the waste heat from the exhaust gas of the gas cycles by using a heat recovery steam generator (HRSG) was studied. The results of this study showed, by taking the weather data of Bangkok (Thailand) that reduction of the ambient temperature to 15 \({}^{\circ}\)C could help to increase the rapid output power between 8 and 13%. The outcome of these output power changes led to 11% additional electricity generated from the same gas turbine power plant [20]. [PERSON] et al. [21] were simulated the application of steam injection gas turbine (STIG) and inlet air cooling (IAC) system on the performance of the gas cycle. The obtained result revealed that both steam injection gas turbine (STIG) and inlet air cooling (IAC) systems increased more than 70% in output power and 20.4% improvement in heat rate. An extensive overview of the various combustion turbine inlet cooling technology (CTIAC) and the advantages and disadvantages concerning the environmental conditions and operational requirements were performed [22]. The application of adding a solar system to the gas turbine with and without storage systems is introduced as new technologies to the gas turbine power plant. In this technology, a solar system is used to heat up the compressed air in a gas turbine before entering the combustion chamber at certain levels. In this way, the air gets hotter, consequently, the mixture of air and fuel in the combustion chamber needs less fuel for the combustion process and this heat is compensated by solar energy. [PERSON] et al. [23] conducted a study to compare solar gas turbine systems with other solar-fossil hybrid power plants. Moreover, in this study different scenarios were proposed to heat the pressurized air by application of a solar tower. The results revealed the annual average of the ration of solar to net electric efficiency was up 19%, amongst the highest conversion efficiencies for solar electric technologies. In addition, the economic analysis showed total plant investment costs from 7000 down to below 1800 \(\upxi\)/kW, depending on power level and solar shares. The description of the prototype solar-powered gas turbine system, installed during 2002 in Spain was reported by [PERSON] et al. [24]. The results revealed that the 165 kW (115 kW solar contribution) electrical power was significantly lower than possible due to the reduced turbine speed and high ambient temperatures. The results revealed that the 165 kW (115 kW solar contribution) electrical power was significantly lower than possible due to the reduced turbine speed and high ambient temperatures. The application of different scenarios for solar gas turbine systems with different power levels was conducted. In this technology, a solar dish applied to heat up the pressurized air in a gas turbine before entering the combustion chamber at certain levels. Therefore, the share of fossil fuel in the combustion chamber was reduced and compensated by solar energy. By this action, the share of annual solar energy increased up to 30%. However, by applying solar systems with modern gas turbine systems led to increasing efficiencies of the solar heat from around 40% up to more than 50% [23]. A concentrated solar power (CSP) plant individually can be integrated with a natural gas-fired combined cycle (NGCC) power plant to produce excess steam consequently to generate more electricity. In other applications, the concentrated solar power (CSP) plant is applied to heat the compressed air in the gas turbine before entering the combustion chamber [25]. [PERSON] et al. [26] examined the performance of a hybrid integrated solar combined cycle (ISCCs). This hybrid system consisted of concentrated solar power (CSP) and a natural gas-fired combined cycle (NGCC) power plant. Results showed that this hybrid system could save 10-15% of nominal capacity from solar energy can be cost-effective as a dispatchable electricity generation resource.