Thermodynamic analysis of a 30 kW gas-solar hybrid microturbine system based on radiation conditions in Qom province

Abstract

In this paper, the thermodynamic analysis of a 30 kW gas microturbine combined with a solar parabolic concentrator has been performed under three different radiation conditions in Qom province. In the above system, a heat recovery, recuperator, is also used to increase the efficiency of the cycle. The programming is written in EES software. The effect of influential parameters such as ambient temperature, compressor pressure ratio, inlet gas temperature to the turbine, solar radiation intensity, receiver area and the presence of recuperator on the system performance have been investigated. The results show that with increasing the compressor pressure ratio, the electrical and mechanical efficiency of the system first increases and then decreases so that the overall efficiency of the system has its maximum value in the compressor pressure ratio in the range of 3 to 4. Also, the gas-solar turbine in August reduces the specific fuel consumption by about 58% compared to simple gas microturbines and at the same time increases the electrical and mechanical efficiency of the system by about 20%. In addition, by increasing the area of the receiver per 20 m2, the specific fuel consumption is reduced by about 38%.

Keywords

• thermodynamic analysis
• gas microturbine
• requperator
• solar energy
• qom province