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Relevant bibliographies by topics / Transcritical CO2

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Journal articles

Academic literature on the topic 'Transcritical CO2'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Transcritical CO2"

1

Liu, Ying Fu, Chun Jing Geng, and Guang Ya Jin. "Vortex Tube Expansion Transcritical CO2 Heat Pump Cycle." Applied Mechanics and Materials 190-191 (July 2012): 1340–44. http://dx.doi.org/10.4028/www.scientific.net/amm.190-191.1340.

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The application of natural refrigerant CO2 is of great significance to reduce the greenhouse effect and ozone depletion. Transcritical CO2 heat pump cycle is presently an important aspect of natural refrigerant alternatives research. In this paper, a vortex tube expansion transcritical CO2 heat pump cycle is established and compared to that of the transcritical CO2 refrigeration cycle with throttle valve. Thermodynamic analysis results indicate that the system performance of vortex tube expansion transcritical CO2 heat pump cycle is better than the transcritical CO2 heat pump cycle with thrott

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2

Yang, Dazhang, Yang Li, Jing Xie, and Jinfeng Wang. "Research and application progress of transcritical CO2 refrigeration cycle system: a review." International Journal of Low-Carbon Technologies 17 (December 8, 2021): 245–56. http://dx.doi.org/10.1093/ijlct/ctab086.

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Abstract CO2 refrigerant and its transcritical cycle system have become the research focus in the refrigeration field due to their advantages of environmentally friendly, safe and low environmental temperature adaptability. This paper summarizes the research progress on the modified methods for the defects of basic transcritical CO2 refrigeration cycle system in recent years. Meanwhile, the technical status of transcritical CO2 refrigeration technology in commercial supermarket refrigeration, heat pump system, automobile air conditioning and artificial ice rink is discussed in detail. Finally,

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3

Yang, Dazhang, Yang Li, Jing Xie, and Jinfeng Wang. "Research and application progress of transcritical CO2 refrigeration cycle system: a review." International Journal of Low-Carbon Technologies 17 (December 8, 2021): 245–56. http://dx.doi.org/10.1093/ijlct/ctab086.

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Abstract:

Abstract CO2 refrigerant and its transcritical cycle system have become the research focus in the refrigeration field due to their advantages of environmentally friendly, safe and low environmental temperature adaptability. This paper summarizes the research progress on the modified methods for the defects of basic transcritical CO2 refrigeration cycle system in recent years. Meanwhile, the technical status of transcritical CO2 refrigeration technology in commercial supermarket refrigeration, heat pump system, automobile air conditioning and artificial ice rink is discussed in detail. Finally,

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4

Belman-Flores, J. M., V. H. Rangel-Hernández, V. Pérez-García, A. Zaleta-Aguilar, Qingping Fang, and D. Méndez-Méndez. "An Advanced Exergoeconomic Comparison of CO2-Based Transcritical Refrigeration Cycles." Energies 13, no. 23 (2020): 6454. http://dx.doi.org/10.3390/en13236454.

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CO2-based transcritical refrigeration cycles are currently gaining significant research attention, as they offer a viable solution to the use of natural refrigerants (e.g., CO2). However, there are almost no papers that offer an exergoeconomic comparison between the different configurations of these types of systems. Accordingly, the present work deals with a comparative exergoeconomic analysis of four different CO2-based transcritical refrigeration cycles. In addition, the work is complemented by an analysis of the CO2 abatement costs. The influences of the variation of the evaporating temper

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5

Feng, Fan, Ze Zhang, Xiufang Liu, Changhai Liu, and Yu Hou. "The Influence of Internal Heat Exchanger on the Performance of Transcritical CO2 Water Source Heat Pump Water Heater." Energies 13, no. 7 (2020): 1787. http://dx.doi.org/10.3390/en13071787.

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The characteristics of the transcritical CO2 heat pump water heater (HPWH) system are; a lower inlet hot water temperature (Ti-hw) (sometimes this is lower than the water source temperature), and an outlet gas cooler temperature (To-gc) which is affected by the Ti-hw and often lower than the critical temperature. In order to study the effects of the internal heat exchanger (IHX) on the operational performance of the transcritical CO2 HPWH when To-gc is low, a transcritical CO2 water source HPWH experiment platform is established to conduct experimental research and comparative analysis on the

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6

Sarkar, Jahar. "Performance improvement of double-tube gas cooler in CO2 refrigeration system using nanofluids." Thermal Science 19, no. 1 (2015): 109–18. http://dx.doi.org/10.2298/tsci120702121s.

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The theoretical analyses of the double-tube gas cooler in transcritical carbon dioxide refrigeration cycle have been performed to study the performance improvement of gas cooler as well as CO2 cycle using Al2O3, TiO2, CuO and Cu nanofluids as coolants. Effects of various operating parameters (nanofluid inlet temperature and mass flow rate, CO2 pressure and particle volume fraction) are studied as well. Use of nanofluid as coolant in double-tube gas cooler of CO2 cycle improves the gas cooler effectiveness, cooling capacity and COP without penalty of pumping power. The CO2 cycle yields best per

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7

Liu, Ying Fu, and Guang Ya Jin. "Vortex Tube Expansion Two-Stage Transcritical CO₂ Refrigeration Cycle." Advanced Materials Research 516-517 (May 2012): 1219–23. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1219.

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Use of vortex tube as an expansion device in transcritical CO2 cycle could reduce the throttle loss and improve the coefficient of performance. In this paper, a vortex tube expansion two-stage transcritical CO2 refrigeration cycle(VTTC) is established and compared to that of the two-stage transcritical CO2 refrigeration cycle with throttle valve(TVTC). Thermodynamic analysis results indicate that there is also an optimum heat rejection pressure for the vortex tube cycle, and the COP improvement is 2.4%~16.3% at given conditions. Decrease in evaporation temperature or increase in gas-cooler out

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8

Fukuta, Mitsuhiro, Yuki Nakamura, and Tadashi Yanagisawa. "Characteristics of CO2 transcritical expansion process." HVAC&R Research 19, no. 7 (2013): 767–78. http://dx.doi.org/10.1080/10789669.2013.833544.

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9

SARKAR, JAHAR. "TRANSCRITICAL CO2 REFRIGERATION SYSTEMS: COMPARISON WITH CONVENTIONAL SOLUTIONS AND APPLICATIONS." International Journal of Air-Conditioning and Refrigeration 20, no. 04 (2012): 1250017. http://dx.doi.org/10.1142/s2010132512500174.

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Carbon dioxide (CO2) is one of the natural refrigerants which can be used as working fluid in various refrigeration applications along with the ammonia and hydrocarbons due to its eco-friendliness, higher volumetric capacity, good heat transfer properties, etc. The present article consists of two parts: A detailed comparative study of CO2 -based transcritical refrigeration systems with conventional refrigerants-based systems in terms of both thermodynamic and heat transfer performances, and review of both theoretical and experimental researches on transcritical CO2 vapor compression cycle for

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10

Verma, Abhishek, S. C. Kaushik, and S. K. Tyagi. "Thermodynamic Analysis of a Combined Single Effect Vapour Absorption System and tc-CO2 Compression Refrigeration System." HighTech and Innovation Journal 2, no. 2 (2021): 87–98. http://dx.doi.org/10.28991/hij-2021-02-02-02.

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Transcritical CO2 refrigeration system is coupled with the single effect vapour absorption with LiBr-water as a working pair having an objective to enhance the performance of low temperature transcritical refrigeration system while using natural working pair and to reduce the electricity consumption to produce low temperature refrigeration. The high grade waste heat rejected in the gas cooler of tc-CO2 compression refrigeration system (TCRS) is utilized to run the single effect vapour absorption system (SEVAR) to enhance the energy efficiency of the system. The gas cooler in the transcritical

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