Transformation of a University Lecture Hall in Valladolid (Spain) into a NZEB: LCA of a BIPV System Integrated in Its Façade

Table 6

Impact of the module failure rate on the emission factor and on EI-99 impact estimation.

Failure rate (%)	Total GHG emissions (kg CO2)	Emission factor (kg CO2/kWh)	Δ emission factor^† (%)	EI-99 impact for entire system (kPt)	Δ EI-99 impact^† (%)
13	54,722	0.156	3.81	9.781	2.09
12	54,278	0.155	2.96	9.811	1.79
11	53,643	0.153	1.76	9.862	1.28
10	53,195	0.152	0.91	9.909	0.81
9	53,164	0.152	0.85	9.920	0.70
8	52,716	0.151	—	9.990	—
7	52,084	0.149	−1.20	10.041	−0.51
6	52,053	0.149	−1.26	10.052	−0.62
5	51,605	0.147	−2.11	10.103	−1.13
4	51,158	0.146	−2.96	10.169	−1.79
3	50,942	0.146	−3.37	10.221	−2.32

^†Taking an 8% failure rate as a reference.