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 | |
| 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