Development of a new integrated structure for simultaneous generation of power and liquid carbon dioxide using solar dish collectors.

The simultaneous design of units and the integration of processes reduce the amount of required equipment and energy consumption. Types of research in recent years have turned their attention to improving the efficiency of thermal and heat recovery systems. This paper aims to develop an integrated structure for simultaneous generation of power and liquefaction of carbon dioxide. The hybrid system consists of four sections: oxy - fuel power plant for power generation with CO 2 capture, pure oxygen production using the air separation unit, carbon dioxide liquefaction system using an absorption refrigeration cycle and heat supply using solar dish collectors. The integrated design has the capacity of producing 26.27 kg/s of liquid carbon dioxide and 179 MW of power. Exergy analysis shows that the maximum exergy destruction belongs to the distillation towers at 24.73%, and the minimum exergy destruction is for air coolers at 0.113% compared to other equipment. Accordingly, the total exergy efficiency of the whole integrated structure is 60.74% and the total exergy destruction is 416 MW. The economic analysis of the integrated structure shows that the period of return is 3.3 years, and the prime cost of the product is 3.04 cents/kWh. Furthermore, by using sensitivity analysis the important and effective parameters of the developed integrated structure was investigated. • Air separation unit, oxy-fuel power generation and CO 2 capture with solar dish collector hybrid system are introduced. • Solar dish collectors produced heat is used as heat source of absorption refrigeration, steam power cycle and ORC power generation. • Total energy and exergy efficiencies of the hybrid system are 37.1% and 60.74%. • Rate and period of investment return were obtained 30.33% and 3.3 years respectively. [ABSTRACT FROM AUTHOR]