Research Article
[Retracted] Energy-Saving Benefits of Air-Source Heat Pump-Assisted Solar Water Heating Systems in Large Stadiums
Table 4
Comparison of annual input costs of various programs.
| | Contrasting options | Air source heat pumps | Electricity | System in this paper | Gas | Solar electric assist |
| | Starting costs (million) | 6.07 | 2.13 | 5.60 | 3.58 | 20.52 | | Equipment age (years) | 15 | 15 | 15 | 10 | 10 | | Operating costs (million) | 3.83 | 7.12 | 6.01 | 11.21 | 13.05 | | Maintenance costs (million) | 5.04 | 7.15 | 5.03 | 7.12 | 6.24 | | Energy prices (million) | 0.22 | 0.22 | 0.22 | 5.23 | 3.22 |
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