Novel integrated structure consisting of CO₂ capture cycle, heat pump unit, Kalina power, and ejector refrigeration systems for liquid CO₂ storage using renewable energies

Abstract

Nowadays, the development of various technologies for improving the quality of life in human societies and, consequently, increased global warming have prioritized environmental factors to reduce major industrial pollutants including carbon dioxide (CO 2 ). Designing efficient integrated processes improves the performance of the whole system. In this study, a novel integrated structure is designed to capture CO 2 from power plants' flue gases and liquefy it. For this purpose, a monoethanolamine-based CO 2 capture cycle, an ejector refrigeration system, a Kalina power unit, and a organic Rankine power plant are utilized. High-and low-temperature heat of the system is provided by the heat pump cycle and geothermal energy, respectively. Then, 2.641 kg/s of liquid CO 2 is generated as the final product of the system. In the proposed system, 20,562 kW heat duty and 657.3 kW power are supplied geothermal energy and the photovoltaic (PV) system, respectively. The coefficient of performance of the heat pump cycle and thermal efficiency of the organic Rankine unit is calculated at 3.661% and 12.64%, respectively. Results of the exergy investigation indicate that the highest exergy destruction belonged to PV cells, which independently accounted for 39.81% of the total reversibility. The exergy efficiency and total reversibility of the structure are computed at 24.2% and 6555 kW. Sensitivity analysis was performed on several of the most important parameters of the combined structure. The outcomes indicate that the ratio of liquid CO 2 rate to total power consumption and net power consumption increase up to 4.096 kg/s LCO 2 /MW and 1669 kW, respectively, when the CO 2 concentration in the flue gas increases from 1 to 9 mol%.

The Role of Intra-Industry Trade, Foreign Direct Investment, and Renewable Energy on Portuguese Carbon Dioxide Emissions

“…This result is according to the previous studies (e.g., Roy [13]; Leitão and Balogh [14]; and Leitão [15]). Furthermore, based on the relationship between Portuguese and Spanish renewable energy and CO 2 emissions, this investigation obtained a negative expected sign, i.e., renewable energy consumption decreases global warming and promotes the improvement of the environment (e.g., Balsalobre-Lorente et al [51]; Dogan and Ozturk [62]; Fuinhas et al [69]; and Ebrahimi et al [76]). Finally, the relationship between FDI and CO 2 emissions showed a negative correlation.…”