Performance comparison between a single-stage and a cascade multi-functional heat pump for both air heating and hot water supply

Hae Won Jung; Hoon Kang; Won Jae Yoon; Yongchan Kim

doi:10.1016/j.ijrefrig.2013.03.003

Performance comparison between a single-stage and a cascade multi-functional heat pump for both air heating and hot water supply

Hae Won Jung
, Hoon Kang
, Won Jae Yoon
, Yongchan Kim^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

83 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1431-1441
Number of pages	11
Journal	International Journal of Refrigeration
Volume	36
Issue number	5
DOIs	https://doi.org/10.1016/j.ijrefrig.2013.03.003
Publication status	Published - 2013 Aug

Bibliographical note

Funding Information:
This research was sponsored by the Korea Institute of Energy Technology Evaluation and Planning (Grant No. 2010T100200474 ) and the Human Resources Development program (Grant No. 20124010203250 ) of the KETEP grant funded by the Korea Government Ministry of Knowledge Economy .

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Heat exchanger
Heat pump
Hot water
Optimization
R134a
R410A

ASJC Scopus subject areas

Building and Construction
Mechanical Engineering

Access to Document

10.1016/j.ijrefrig.2013.03.003

Cite this

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title = "Performance comparison between a single-stage and a cascade multi-functional heat pump for both air heating and hot water supply",

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.",

keywords = "Heat exchanger, Heat pump, Hot water, Optimization, R134a, R410A",

author = "Jung, \{Hae Won\} and Hoon Kang and Yoon, \{Won Jae\} and Yongchan Kim",

note = "Funding Information: This research was sponsored by the Korea Institute of Energy Technology Evaluation and Planning (Grant No. 2010T100200474 ) and the Human Resources Development program (Grant No. 20124010203250 ) of the KETEP grant funded by the Korea Government Ministry of Knowledge Economy .",

year = "2013",

month = aug,

doi = "10.1016/j.ijrefrig.2013.03.003",

language = "English",

volume = "36",

pages = "1431--1441",

journal = "International Journal of Refrigeration",

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AU - Jung, Hae Won

AU - Kang, Hoon

AU - Yoon, Won Jae

AU - Kim, Yongchan

N1 - Funding Information: This research was sponsored by the Korea Institute of Energy Technology Evaluation and Planning (Grant No. 2010T100200474 ) and the Human Resources Development program (Grant No. 20124010203250 ) of the KETEP grant funded by the Korea Government Ministry of Knowledge Economy .

PY - 2013/8

Y1 - 2013/8

N2 - 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.

AB - 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.

KW - Heat exchanger

KW - Heat pump

KW - Hot water

KW - Optimization

KW - R134a

KW - R410A

UR - https://www.scopus.com/pages/publications/84879245038

U2 - 10.1016/j.ijrefrig.2013.03.003

DO - 10.1016/j.ijrefrig.2013.03.003

M3 - Article

AN - SCOPUS:84879245038

SN - 0140-7007

VL - 36

SP - 1431

EP - 1441

JO - International Journal of Refrigeration

JF - International Journal of Refrigeration

IS - 5

ER -

Performance comparison between a single-stage and a cascade multi-functional heat pump for both air heating and hot water supply

Abstract

Bibliographical note

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

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