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Evaluation of cycle performance of room air conditioner using HFO1234yf as refrigerant.

Number: pap. n. R18, 2208

Author(s) : ENDOH K., MATSUSHIMA H., TAKAKU S.

Summary

A new refrigerant, HFO1234yf, with a very low global warming potential has been proposed. We have done an improvement test, in which we modified a room air conditioner that had been using R410A to meet the properties of HFO1234yf and evaluated the cycle performance. The main modifications were doubling the number of paths of heat exchangers, triplicating the inner-diameter cross-sectional area of a gas-side connecting pipe, and installing an oil separator. The ratios of HFO1234yf/R410A COP are 97/88% at the rated/medium cooling capacity and 93/98% at the rated/medium heating capacity. Therefore, the ratio of the annual performance factor is 95%. The decrease in the COP ratio at the medium cooling capacity is because of the refrigerant accumulation in some paths under the large number of paths of the outdoor heat exchanger. The increase in the diameter of the gas-side connecting pipe involves challenges such as increasing the workload of the installation.

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Pages: 8 p.

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Details

  • Original title: Evaluation of cycle performance of room air conditioner using HFO1234yf as refrigerant.
  • Record ID : 30000788
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2010/07/12

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