Fig. 1. Main components of experimental heat pump system with hybrid ground heat exchanger.
Fig. 2. Schematic diagram of experimental heat pump system with hybrid ground heat exchanger.
Fig. 3. Hourly average temperature variations on source and load sides.
Fig. 4. Water temperature variation on source and load sides for a typical cooling week.
Fig. 5. Cooling capacity, heat release of HGHE, and power consumption: August 5, 2017.
Fig. 6. Patterns on water temperature variations for source and load sides.
Fig. 7. Patterns on heat release of HGHE and power consumption of system.
Fig. 8. Cooling COP of heat pump and system: August 5, 2017.
Fig. 9. Patterns on cooling COP of heat pump and system.
Fig. 10. Capacity, power consumption, and COP of system with EST: Jul. 31∼Aug. 6, 2017.
Fig. 11. COP with outdoor air temperature: Jul. 31~Aug. 6, 2017.
Table 1. Parameters and uncertainties
Table 2. Capacity ratios of SWHE and VGHE in hybrid ground heat exchanger
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