Cooling performance of a vertical ground-coupled heat pump system installed in a school building

This paper presents the cooling performance of a water-to-refrigerant type ground heat source heat pump system (GSHP) installed in a school building in Korea. The evaluation of the cooling performance has been conducted under the actual operation of GSHP system in the summer of year 2007. Ten heat p...

Full description

Saved in:
Bibliographic Details
Published in:Renewable energy 2009-03, Vol.34 (3), p.578-582
Main Authors: Hwang, Yujin, Lee, Jae-Keun, Jeong, Young-Man, Koo, Kyung-Min, Lee, Dong-Hyuk, Kim, In-Kyu, Jin, Sim-Won, Kim, Soo H.
Format: Article
Language:English
Subjects:
Air conditioning systems
Air conditioning. Ventilation
Applied sciences
Cooling performance
Devices using thermal energy
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Ground heat exchanger
Ground source heat pump
Heat pumps
Heating, air conditioning and ventilation
Techniques, equipment. Control. Metering
Water-to-refrigerant
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents the cooling performance of a water-to-refrigerant type ground heat source heat pump system (GSHP) installed in a school building in Korea. The evaluation of the cooling performance has been conducted under the actual operation of GSHP system in the summer of year 2007. Ten heat pump units with the capacity of 10 HP each were installed in the building. Also, a closed vertical typed-ground heat exchanger with 24 boreholes of 175 m in depth was constructed for the GSHP system. To analyze the cooling performance of the GSHP system, we monitored various operating conditions, including the outdoor temperature, the ground temperature, and the water temperature of inlet and outlet of the ground heat exchanger. Simultaneously, the cooling capacity and the input power were evaluated to determine the cooling performance of the GSHP system. The average cooling coefficient of performance (COP) and overall COP of the GSHP system were found to be ∼8.3 and ∼5.9 at 65% partial load condition, respectively. While the air source heat pump (ASHP) system, which has the same capacity with the GSHP system, was found to have the average COP of ∼3.9 and overall COP of ∼3.4, implying that the GSHP system is more efficient than the ASHP system due to its lower temperature of condenser.
ISSN:0960-1481
1879-0682
DOI:10.1016/j.renene.2008.05.042