Research Article
Research on the Efficiency and Economic Impact of Energy-Saving Transformation of Residential Buildings in Different Climatic Regions of China
Table 5
Comparisons between cooling expenses before and after transformation of existing residential buildings in Harbin (self-drawing).
| | Harbin | Benchmark building (1980) | Roof transformation | Wall transformation | Window transformation | Reference building (meeting energy efficiency standard) |
| | Cooling: electric power (kWh/m2) | 2.61 | 2.55 | 2.45 | 3.06 | 2.91 |
| | Cooling expense (Yuan/m2) | 1.33 | 1.30 | 1.25 | 1.56 | 1.49 |
| | Technical information | | | | | | | | | | | | | | | | | Air change rate: 1.5 times/hour | | | Air change rate: 0.5 times/hour | Air change rate: 0.5 times/hour |
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