Experimental study on the performance of a simultaneous heating and cooling multi-heat pump with the variation of operation mode

Hoon Kang; Youngju Joo; Hyunjoon Chung; Yongchan Kim; Jongmin Choi

doi:10.1016/j.ijrefrig.2009.02.015

Experimental study on the performance of a simultaneous heating and cooling multi-heat pump with the variation of operation mode

Hoon Kang
, Youngju Joo
, Hyunjoon Chung
, Yongchan Kim^*
, Jongmin Choi

^*Corresponding author for this work

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

25 Citations (Scopus)

Abstract

The cooling load in the winter season becomes significant in commercial buildings and hotels because of the wide usage of office equipment and improved wall insulation. In this study, a simultaneous heating and cooling multi-heat pump having four indoor units and an outdoor unit was designed and tested in five operation modes: cooling-only, heating-only, cooling-main, heating-main, and entire heat recovery. The performance of the system with R410a was optimized by adjusting the system's control parameters. In the cooling-main mode, the rate of the bypass flow to the heating-operated indoor unit was optimized by controlling the EEV opening of the outdoor unit. In the heating-main mode, the mass flow rate to the cooling-operated indoor unit was optimized by adjusting the EEV opening in the outdoor unit. In the entire heat recovery mode, the compressor speed was controlled to improve the system COP with appropriate heating and cooling capacities.

Original language	English
Pages (from-to)	1452-1459
Number of pages	8
Journal	International Journal of Refrigeration
Volume	32
Issue number	6
DOIs	https://doi.org/10.1016/j.ijrefrig.2009.02.015
Publication status	Published - 2009 Sept

Bibliographical note

Funding Information:
This work was jointly supported by a grant (2006-E-CM11-P-05-0-000) from the Korea Energy Management Corporation and Korea University.

Keywords

Chauffage
Compresseur
Compressor
Cooling
Détendeur électronique
Electronic expansion valve
Experiment
Expérimentation
Heat pump
Heating
Optimisation
Optimization
Pompe à chaleur
R410A
Réfrigération
Variable speed
Vitesse variable

ASJC Scopus subject areas

Building and Construction
Mechanical Engineering

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10.1016/j.ijrefrig.2009.02.015

Cite this

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title = "Experimental study on the performance of a simultaneous heating and cooling multi-heat pump with the variation of operation mode",

abstract = "The cooling load in the winter season becomes significant in commercial buildings and hotels because of the wide usage of office equipment and improved wall insulation. In this study, a simultaneous heating and cooling multi-heat pump having four indoor units and an outdoor unit was designed and tested in five operation modes: cooling-only, heating-only, cooling-main, heating-main, and entire heat recovery. The performance of the system with R410a was optimized by adjusting the system's control parameters. In the cooling-main mode, the rate of the bypass flow to the heating-operated indoor unit was optimized by controlling the EEV opening of the outdoor unit. In the heating-main mode, the mass flow rate to the cooling-operated indoor unit was optimized by adjusting the EEV opening in the outdoor unit. In the entire heat recovery mode, the compressor speed was controlled to improve the system COP with appropriate heating and cooling capacities.",

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author = "Hoon Kang and Youngju Joo and Hyunjoon Chung and Yongchan Kim and Jongmin Choi",

note = "Funding Information: This work was jointly supported by a grant (2006-E-CM11-P-05-0-000) from the Korea Energy Management Corporation and Korea University.",

year = "2009",

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doi = "10.1016/j.ijrefrig.2009.02.015",

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AU - Kang, Hoon

AU - Joo, Youngju

AU - Chung, Hyunjoon

AU - Kim, Yongchan

AU - Choi, Jongmin

N1 - Funding Information: This work was jointly supported by a grant (2006-E-CM11-P-05-0-000) from the Korea Energy Management Corporation and Korea University.

PY - 2009/9

Y1 - 2009/9

N2 - The cooling load in the winter season becomes significant in commercial buildings and hotels because of the wide usage of office equipment and improved wall insulation. In this study, a simultaneous heating and cooling multi-heat pump having four indoor units and an outdoor unit was designed and tested in five operation modes: cooling-only, heating-only, cooling-main, heating-main, and entire heat recovery. The performance of the system with R410a was optimized by adjusting the system's control parameters. In the cooling-main mode, the rate of the bypass flow to the heating-operated indoor unit was optimized by controlling the EEV opening of the outdoor unit. In the heating-main mode, the mass flow rate to the cooling-operated indoor unit was optimized by adjusting the EEV opening in the outdoor unit. In the entire heat recovery mode, the compressor speed was controlled to improve the system COP with appropriate heating and cooling capacities.

AB - The cooling load in the winter season becomes significant in commercial buildings and hotels because of the wide usage of office equipment and improved wall insulation. In this study, a simultaneous heating and cooling multi-heat pump having four indoor units and an outdoor unit was designed and tested in five operation modes: cooling-only, heating-only, cooling-main, heating-main, and entire heat recovery. The performance of the system with R410a was optimized by adjusting the system's control parameters. In the cooling-main mode, the rate of the bypass flow to the heating-operated indoor unit was optimized by controlling the EEV opening of the outdoor unit. In the heating-main mode, the mass flow rate to the cooling-operated indoor unit was optimized by adjusting the EEV opening in the outdoor unit. In the entire heat recovery mode, the compressor speed was controlled to improve the system COP with appropriate heating and cooling capacities.

KW - Chauffage

KW - Compresseur

KW - Compressor

KW - Cooling

KW - Détendeur électronique

KW - Electronic expansion valve

KW - Experiment

KW - Expérimentation

KW - Heat pump

KW - Heating

KW - Optimisation

KW - Optimization

KW - Pompe à chaleur

KW - R410A

KW - Réfrigération

KW - Variable speed

KW - Vitesse variable

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DO - 10.1016/j.ijrefrig.2009.02.015

M3 - Article

AN - SCOPUS:68049085886

SN - 0140-7007

VL - 32

SP - 1452

EP - 1459

JO - International Journal of Refrigeration

JF - International Journal of Refrigeration

IS - 6

ER -

Experimental study on the performance of a simultaneous heating and cooling multi-heat pump with the variation of operation mode

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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