Performance comparison between a single-stage and a cascade multi-functional heat pump for both air heating and hot water supply
- Authors
- Jung, Hae Won; Kang, Hoon; Yoon, Won Jae; Kim, Yongchan
- Issue Date
- 8월-2013
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Heat pump; Hot water; Heat exchanger; R134a; R410A; Optimization
- Citation
- INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, v.36, no.5, pp.1431 - 1441
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
- Volume
- 36
- Number
- 5
- Start Page
- 1431
- End Page
- 1441
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/102504
- DOI
- 10.1016/j.ijrefrig.2013.03.003
- ISSN
- 0140-7007
- Abstract
- Multi heat pumps have been widely used in buildings due to their higher energy efficiency. Recently, demands for multi-functional heat pumps, which can provide heating, cooling, and water heating in a building, have been increased. In this study, a cascade multi-functional heat pump, combining a multi heat pump using R410A for air heating with a water heating unit using R134a for hot water supply, was investigated experimentally. The performance of the cascade multi-functional heat pump was measured by varying the refrigerant charge amount, EEV opening, water flow rate, and water inlet temperature. Test results were compared with those of a single-stage multi-functional heat pump using R410A for air and water heating. The cascade multi-functional heat pump adopting the water heating unit showed more stable air and water heating operations and higher water outlet temperatures than the single-stage multi-functional heat pump. (C) 2013 Elsevier Ltd and IIR. All rights reserved.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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