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Improving the performance of a rechargeable personal cooling system with low GWP refrigerants.

Number: pap. n. 1126

Author(s) : DHUMANE R., QIAO Y., LING J., et al.

Summary

Personal cooling systems (PCS) enable 10-30% saving in building energy consumption, which takes up 41% of US primary energy. An innovative PCS called Roving Comforter (RoCo) uses R134a based vapour compression cycle (VCC) to provide cooling. To reduce environmental impact, it is necessary to evaluate RoCo performance with low GWP refrigerants. The condenser heat of VCC is stored in a phase change material (PCM) storage, which limits the cooling operation duration. A recharge operation is conducted after the cooling operation. A validated dynamic model (using Modelica) of VCC integrated with PCM is used to simulate the cooling operation with R32, R1234yf, R1234ze(E) and R290. The change in COP is +8%, -12% and -5% and -5% with R32, R1234yf, R1234ze (E) and R290 respectively. Dynamic pressure, mass flow rates, temperature and power are presented.

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Details

  • Original title: Improving the performance of a rechargeable personal cooling system with low GWP refrigerants.
  • Record ID : 30026780
  • 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.2019.1126

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