Exergetic and Economic Evaluation of CO 2 Liquefaction Processes

Feng Chen and Tatiana Morosuk
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Feng Chen: Institute for Energy Engineering, Technische Universität Berlin, 10587 Berlin, Germany
Tatiana Morosuk: Institute for Energy Engineering, Technische Universität Berlin, 10587 Berlin, Germany

Energies, 2021, vol. 14, issue 21, 1-13

Abstract: The transport of CO 2 , as a part of the carbon capture and storage chain, has received increased attention in the last decade. This paper aims to evaluate the most promising CO 2 liquefaction processes that can be used for port-to-port and port–offshore CO 2 ship transportation. The energetic, exergetic, and economic analyses are applied. The liquefaction pressure has been set to 15 bar (liquefaction temperature ?30 °C), which corresponds to the design of the existing CO 2 carriers. The three-stage vapor-compression process has been selected among closed systems (with propane-R290, ammonia-R717, and R134a as the working fluid) and the precooled Linde–Hampson process—as the open system (with R717). The three-stage vapor-compression process R290 shows the lowest energy consumption, and the CO 2 liquefaction cost 21.3 USD/tCO 2 . Although the power consumption of precooled Linde–Hampson process is 3.1% higher than the vapor-compression process with R209, the lowest total capital expenditures are notable. The CO 2 liquefaction cost of precooled Linde–Hampson process is 21.13 USD/tCO 2 . The exergetic efficiency of the three-stage vapor-compression process with R290 is 66.6%, while the precooled Linde–Hampson process is 64.8%.

Keywords: carbon dioxide; liquefaction; CO 2 ship transportation; exergy analysis; economic analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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