Share

Development and experimental investigation on two-stage compression variable frequency air source heat pump.

Author(s) : TIAN C. Q., LIANG N., SHI W. X., et al.

Summary

A two-stage compression variable frequency air source heat pump is proposed combining variable frequency technology with two-stage compression cycle. The empirical formula of optimal intermediate pressure is calculated, and two-control-model with the priority target as COP or heating capacity is advanced in this paper. A test bench is developed for the two-stage compression variable frequency air source heat pump in order to observe the practical operation and obtain the measured data. The COP and compressor discharge temperature in the single-stage compression system and two-stage compression system at different evaporating temperatures are measured, and the variation of heating capacity in the two-stage compression system along with the evaporating temperature and power frequency of low pressure stage compressor is investigated experimentally too. The experimental results show that the COP is over 2, the compressor discharge temperature under 120ºC, and the heating capacity can meet the heating load needed when the condensing temperature is 50ºC and evaporating temperature -25ºC. The experiment shows also that this system runs safely and steadily, which can be used in the cold regions where outdoor temperature is not lower than -18ºC.

Available documents

Format PDF

Available

  • Public price

    20 €

  • Member price*

    15 €

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

Details

  • Original title: Development and experimental investigation on two-stage compression variable frequency air source heat pump.
  • Record ID : 2008-2277
  • Languages: English
  • Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2006/07/17

Links


See other articles from the proceedings (157)
See the conference proceedings

Indexing