Optimization of compression ratio in closed-loop CO2 liquefaction process

Park, Taekyoon; Kwak, Hyungyeol; Kim, Yeonsoo; Lee, Jong Min

doi:10.1007/s11814-018-0132-7

Cited by 5 publications

(2 citation statements)

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“…In addition, the selection of key parameters in the liquefaction process is also crucial. Coolant temperature [4], compression ratio [12], CO2 purity [13], and so on have been analyzed in detail. The liquefaction pressure is deemed as the most crucial element.…”

Section: Figure 1 Flow Diagram Of Ccus Chainmentioning

confidence: 99%

“…Exergy analysis from the second law of thermodynamics gives a significant reference about the deviation of the system performance from its ideal state. Exergy efficiency is calculated by eq(12) [8]: (12) in which in Evaluating the influence of the irreversibility of each component on the system and exploring the energy-saving potential are hot issues. Exergy penalty calculation models are summarized in Table1.…”

Section: Exergy Analysismentioning

confidence: 99%

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Thermodynamic and exergetic evaluation of CO2 liquefaction for ship transport

Zheng,

Zhang,

Yue

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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CO2 liquefaction is significant to ensure CO2 transport safety and improve efficiency. Aiming at the temperature and pressure required for ship transport, this paper examines four liquefaction schemes including the compression refrigeration system, the Linde Hampson system, the precooled Linde Hampson system and the Claude system. The thermodynamic and exergetic ananlysis models are established primarily and total power consumption, liquefaction efficiency as well as exergy efficiency of the four systems are calculated and compared. The precooled Linde Hampson system shows the best performance with the three indicators of 391.74 kJ/kg, 97.97 % and 55.86 %, respectively. Additionally, exergy destruction among the system components are analyzed for Linde Hampson system and precooled Linde Hampson system. The maximum exergy destruction stem is from compressors. Another thing to note is that the proportion of the total exergy destruction with Joule-Thomson (J-T) valves are 19.38 % and 2.63 %, respectively. Furthermore, the replacement of the J-T valve by a liquid expander allowed for 9.35 % and 0.94 % electric power saving for the two systems, respectively. The pressure drop before and after the J-T valve directly determines the effect of this change. The research results could provide some vital reference for choosing proper CO2 liquefaction methods and reducing energy consumption during the process.

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Section: Figure 1 Flow Diagram Of Ccus Chainmentioning

confidence: 99%

Section: Exergy Analysismentioning

confidence: 99%