Performance optimization of a cascade multi-functional heat pump in various operation modes

Hae Won Jung, Hoon Kang, Hyunjoon Chung, Jae Hwan Ahn, Yong Chan Kim

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A multi-heat pump has been widely used to provide cooling and heating in a building. In addition, the demands for a cascade heat pump water heater have been increased due to its higher energy efficiency with high water temperature. In this study, a cascade multi-functional heat pump, which combines a multi-heat pump using R410A for air heating and cooling with a cascade heat pump using R134a for water heating, is considered to provide simultaneous air heating, air cooling, and water heating in a building. The performance of the cascade multi-functional heat pump was measured and analyzed in four operation modes: full-heating hot water, heating-main hot water, full-cooling hot water, and cooling-main hot water. The performance of the cascade multi-functional heat pump in each of the four operation modes was optimized by adjusting control parameters such as the compressor rotation speed and EEV opening and by modifying the refrigerant flow path.

Original languageEnglish
Pages (from-to)57-68
Number of pages12
JournalInternational Journal of Refrigeration
Volume42
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Pumps
Heating
Cooling
Water
Air
Hot water heating
Water heaters
Cascades (fluid mechanics)
Hot Temperature
Energy efficiency
Compressors
Flow of fluids
Temperature

ASJC Scopus subject areas

  • Mechanical Engineering
  • Building and Construction

Cite this

Performance optimization of a cascade multi-functional heat pump in various operation modes. / Jung, Hae Won; Kang, Hoon; Chung, Hyunjoon; Ahn, Jae Hwan; Kim, Yong Chan.

In: International Journal of Refrigeration, Vol. 42, 01.01.2014, p. 57-68.

Research output: Contribution to journalArticle

Jung, Hae Won ; Kang, Hoon ; Chung, Hyunjoon ; Ahn, Jae Hwan ; Kim, Yong Chan. / Performance optimization of a cascade multi-functional heat pump in various operation modes. In: International Journal of Refrigeration. 2014 ; Vol. 42. pp. 57-68.
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