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An integrated solution enabling low superheat operation for improved performance in reversible chiller systems.

Number: pap. 2527

Author(s) : KRISHNA A., WINANDY E., BERTAGNOLIO S.

Summary

The adoption and proliferation of variable speed compressors and electronic expansion valves (EXVs) in high-efficiency reversible chiller systems provides the opportunity to optimize the performance of the unit around a new set of variables. This paper details the benefits of a controls framework designed to enable low-superheat (below 5K) operation to optimize the seasonal energy efficiency ratio (SEER) of a commercial-scale chiller in a safe manner. The various attributes of low-superheat operation over conventional (>5K) chiller operation, including the necessary changes in circuit controller management and reliability of the compressor, is discussed. The performance benefit for a range of capacities and operating conditions, with particular attention to evaporator effectiveness, is also presented. Ultimately, this provides a template from which significantly improved system performance can be achieved.

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Pages: 10

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Details

  • Original title: An integrated solution enabling low superheat operation for improved performance in reversible chiller systems.
  • Record ID : 30024596
  • Languages: English
  • Source: 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2018/07/09

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