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Dynamic modeling and control strategy of a transcritical CO2 cycle for a multi-temperature refrigerated container system for military applications.

Number: pap. n. 208

Author(s) : BARTA R., ZIVIANI D., HUGENROTH J., et al.

Summary

A transcritical carbon dioxide (CO2) refrigeration cycle has been investigated for applications in U.S. Army Multi-Temperature Refrigerated Container Systems (MTRCS). The cycle configuration has been optimized to meet both environmental and energy efficiency targets. The proposed transcritical CO2 cycle utilizes an axial multi-piston compressor-expander based on the Sanderson Rocker Arm Mechanism (S-RAM) that enables expansion energy recovery. The cycle features three compression stages, intercooling between the 2nd and 3rd compression stages, flash tank economization, and expansion work recovery. The numerical optimizations led to a maximum coefficient of performance (COP) of 1.0 at an ambient air temperature of 57.2 °C. Due to the complexity of the cycle, a dynamic model of the system was developed to investigate different control strategies. Simulation results showed that the system was able to operate with adequate compressor suction superheats and flash tank liquid under excitations as well as varying operating conditions applied to both evaporators.

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Details

  • Original title: Dynamic modeling and control strategy of a transcritical CO2 cycle for a multi-temperature refrigerated container system for military applications.
  • Record ID : 30026221
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0208

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