Research Article
Performance Assessment of a Hybrid Solar-Geothermal Air Conditioning System for Residential Application: Energy, Exergy, and Sustainability Analysis
Table 1
Main assumptions for analysis (Isfahan case study, month of January).
| | Parameter | Value |
| | General parameters | | | Design temperature | 22.5 (°C) | | Dead state temperature | 10 (°C) | | Ground temperature | 17 (°C) | | Thermal load | 10.1 (kW) | | Solar irradiance | 0.2 (kW m−2) | | Battery efficiency | 70% | | Power conversion efficiency | 18% |
| | GSHX parameters | | | Working fluid | Water | | Inlet temperature | 5 (°C) | | Outlet temperature | 15 (°C) | | Soil resistance | 230 (kW−1 m °C) | | Ground pump efficiency | 80% | | Ground heat exchanger efficiency | 80% |
| | Heat pump parameters | | | Evaporator pressure | 200 (kPa) | | Condenser pressure | 800 (kPa) | | Refrigerant | R-134a | | Condenser efficiency | 80% | | Evaporator efficiency | 80% | | Compressor efficiency | 80% | | Expansion valve efficiency | 80% |
| | Room heater parameters | | | Working fluid | Water | | Inlet temperature | 20 (°C) | | Outlet temperature | 30 (°C) | | Fan-coil heat exchanger efficiency | 80% | | Fan-coil pump efficiency | 80% |
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