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Implementation of inverter-driven household refrigerator/freezer using hydrocarbon isobutane for refrigeration.

Author(s) : CHANG W. R., SHAUT T. S., LIN C. H., et al.

Summary

Hydrocarbon (HC) isobutane (R600a) is one of the environmental friendly refrigerants to the greenhouse effect, and is applied to household refrigerator/freezer (HRF) with fixed frequency (FF) AC induction compressor successfully around the world. As well, the novel variable frequency (VF) HRF has significant energy-efficiency potential and also has a great benefit of low noise. This paper describes the development of a VF HRF using refrigerant R600a driven by a variable-speed reciprocating compressor with a brushless DC (BLDC) motor inside. To compare the performance between the refrigerants R600a and HFC-134a, two inverter-driven HRFs with the same cabinet model are fabricated and studied experimentally. The gross inner volume for this cabinet model is rated 560 litres with a top-mounted freezer of 133 litres. By a steady test of 24 hours, the energy consumption of the R600a VF HRF is 1.426 kWh/day with 12% lower than that of the HFC-134a VF HRF, which rates 1.620 kWh/day under the same storage temperatures and ambient conditions. To deduce the efficiency improvement of VF BLDC compressors for HFC-134a and R600a, the data for the FF HRFs of the same model are also provided. The energy saving potential of HRF with VF BLDC compressor is about 35% for using refrigerants HC R-600a and HFC-134a.

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Details

  • Original title: Implementation of inverter-driven household refrigerator/freezer using hydrocarbon isobutane for refrigeration.
  • Record ID : 2009-0216
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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