Share

IIR document

Investigation on part-load performance of multi-connected air-conditioning (heat pump) unit.

Author(s) : LU H. L., CHEN H. X., XIE J. L., et al.

Summary

According to GB 50189-2005 Design standard for energy efficiency of public buildings, multi-connected air-conditioning (heat pump) unit (MAU) during 98.7% running time, works with part load of designed value, its performance, capacity and especially refrigerating consumed power are obviously different from the designed values, thus it is of great importance to investigate part load performance of a working MAU: SEER and IPLV both are two popular integrated index as international and national standards ARI 210/240-2006, GB/T 18837-2002 to evaluate such a property of MAU in certain degree, they however do not reflect completely practical part load performance of a working MAU, for example, EER of the unit and exact departure to designed condition. In this paper, various effects of different factors on part-load performance, IPLV and SEER are reviewed. Such factors are basically summarized and classified as five kinds: dynamic cooling load, part load rate of MAU, level of match and installation with the building, overall heat transfer coefficient of building envelope and geographical climate parameters. They couple each other and define part-load performance of MAU together; then a method is proposed to define only the actual condition and performance of a working MAU under partial load conditions: EER, part load rate and deviation of outdoor temperature with reference to the designed condition. Two tests on practical PLP of MAU were conducted in Beijing city and Wuhan city respectively, and the result proved the method effective.

Available documents

Format PDF

Pages: ICR07-B2-675

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Investigation on part-load performance of multi-connected air-conditioning (heat pump) unit.
  • Record ID : 2008-0383
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

Links


See other articles from the proceedings (839)
See the conference proceedings

Indexing