Research Article
Research on the Efficiency and Economic Impact of Energy-Saving Transformation of Residential Buildings in Different Climatic Regions of China
Table 1
Parameter comparison of thermal performance of prototype buildings in Beijing (self-drawing).
| | Item | Benchmark building (1980) | Reference building (meeting energy efficiency standard) |
| | Wall | value of exterior wall: 1.7 W/(m2·K) | value of exterior wall: 0.7 W/(m2·K) | | Roof | value of roof: 1.26 W/(m2·K) | value of roof: 0.45 W/(m2·K) | | Window | value of window: 6.4 W/(m2·K) | value of window: 3.1 W/(m2·K) | | Air change rate | 1.5 times/hour | 0.5 times/hour (according to the standard for cold region) | | Running time | 24/7 | 24/7 | | Cooling system | Indoor air conditioner, EER: 3.1 | Indoor air conditioner, EER: 3.1 | | Heat source (central heating) | Natural gas boiler, efficiency: 0.8 | Natural gas boiler, efficiency: 0.8 | | Pump | Constant volume | Constant volume | | Heating period | 11.15–03.15 (next year) | 11.15–03.15 (next year) | | Cooling period | 06.15–08.31 | 06.15–08.31 |
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