Effects of flash tank vapor injection on the heating performance of an inverter-driven heat pump for cold regions

Jaehyeok Heo, Min Woo Jeong, Yong Chan Kim

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

A heat pump has received much attention as substitute for the conventional boiler or heating coil because of its high efficiency. For the wide application of the heat pump, the most important design factor is the performance degradation upon its installation in tropical and cold regions. In this study, the effects of flash tank vapor injection on the heating performance of a two-stage heat pump with an inverter-driven twin rotary compressor were measured and analyzed for compressor frequency ranging from 50 to 100 Hz at ambient temperatures of -15, -5, and 5 °C. The COP and heating capacity of the injection cycle were enhanced by 10% and 25%, respectively, at the ambient temperature of -15 °C. The total mass flow rate of the injection cycle was 30-38% higher than that of the non-injection cycle.

Original languageEnglish
Pages (from-to)848-855
Number of pages8
JournalInternational Journal of Refrigeration
Volume33
Issue number4
DOIs
Publication statusPublished - 2010 Jun 1

Keywords

  • Compresseur
  • Compressor
  • COP
  • Expérimentation
  • Experiment
  • Heat pump
  • Injection
  • Performance
  • Pompe à chaleur
  • Système biétagé
  • Two-stage system
  • Variable speed
  • Vitesse variable

ASJC Scopus subject areas

  • Mechanical Engineering
  • Building and Construction

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