Table 5 Emergy footprint per square metre of house building in the construction stage.
From: Ecological effect life cycle assessment of house buildings based on emergy footprint model
Factors | Unit | Quantity | Transformity (sej/unit) | Emergy (sej) | Emergy footprint (hm2) | Proportion (%) |
|---|---|---|---|---|---|---|
Steel | t | 4.78E − 02 | 5.51E + 15 | 2.63E + 14 | 3.34E − 04 | 29.20 |
Cement | t | 1.43E − 01 | 1.74E + 15 | 2.49E + 14 | 3.16E − 04 | 27.63 |
Sand & Gravel | t | 5.94E − 01 | 1.63E + 14 | 9.68E + 13 | 1.23E − 04 | 10.74 |
Aluminium | t | 1.08E − 02 | 1.30E + 16 | 1.41E + 14 | 1.79E − 04 | 15.60 |
Wood | m3 | 2.21E − 02 | 3.32E + 14 | 7.34E + 12 | 9.33E − 06 | 0.81 |
Glass | t | 7.05E − 04 | 7.90E + 15 | 5.57E + 12 | 7.08E − 06 | 0.62 |
Energy | tce | 4.25E − 03 | 1.17E + 15 | 4.98E + 12 | 6.32E − 06 | 0.55 |
Employed staff | Person. year | 3.05E − 03 | 4.71E + 15 | 1.44E + 13 | 1.83E − 05 | 1.60 |
Water | t | 1.11E + 00 | 1.60E + 12 | 1.78E + 12 | 2.26E − 06 | 0.20 |
Brick | t | 1.06E − 01 | 3.80E + 14 | 4.04E + 13 | 5.13E − 05 | 4.48 |
Ceramic | t | 1.90E − 02 | 3.80E + 14 | 7.23E + 12 | 9.19E − 06 | 0.80 |
COD | t | 3.86E − 04 | 7.90E + 15 | 3.05E + 12 | 3.87E − 06 | 0.34 |
NH3-N | t | 2.51E − 06 | 9.88E + 15 | 2.48E + 10 | 3.16E − 08 | 0.00 |
SO2 | t | 6.12E − 04 | 1.64E + 15 | 1.00E + 12 | 1.28E − 06 | 0.11 |
NOx | t | 6.21E − 04 | 1.64E + 15 | 1.02E + 12 | 1.29E − 06 | 0.11 |
CO2 | t | 8.07E − 02 | 2.30E + 14 | 1.86E + 13 | 2.36E − 05 | 2.06 |
CO | t | 3.33E − 03 | 9.34E + 13 | 3.11E + 11 | 3.95E − 07 | 0.03 |
Floor space | m2.year | 1.60E + 00 | 2.88E + 13 | 4.61E + 13 | 5.86E − 05 | 5.11 |
Total | 9.01E + 14 | 1.15E − 03 | 100 |
