The integrated structure of liquid carbon dioxide and fresh water using solar dish collectors and LNG conversion to natural gas

In this paper, an integrated combined cycle power plant structure and thermal water desalination system have been developed. The integrated design has the capacity of producing 188.6 MW power, 34.77 kg/s fresh water and 94.57 kg/s liquid carbon dioxide. In order to supply the input heat to combined cycle power plant and thermal water desalination, heat recovery operations are carried out on the out flow of the oxy-fuel power plant and solar collector cycle. Also, in order to provide cooling of the air separation unit and natural gas used in the integrated structure, the operation of converting liquefied natural gas (LNG) to natural gas is used. In the integrated structure, the overall thermal energy efficiency is 75.83% and total exergy efficiency is 93.67%, respectively. The total thermal energy efficiency is 13.62% and the total exergy efficiency is 34.55% higher than the integrated structure developed compared to other similar structures in this paper. The period of return is 2.282 years and prime cost of freshwater product is 0.2269 US$/m3.