Improving the Performance of a Semitransparent BIPV by Using High-Reflectivity Heat Insulation Film

Table 1

Optical properties of each component and HISGs.

Module	⁢Item
	Solar direct transmittance	Solar direct reflectance	Visible light transmittance	Visible light reflectance	UV transmittance
Tandem laser module	7.09	10.07	8.4	5.27	0.01
Tandem TCO module	18.33	6.79	2.20	5.15	0.01
a-Si TCO module	23.49	7.30	4.35	5.12	0.01
Heat insulation film A	68.14	16.88	95.32	4.83	1.75
Heat insulation film B	40.63	30.89	84.12	6.01	1.36
Heat insulation film C	33.15	40.71	61.04	22.33	1.00
Rear glass	81.15	5.04	88.85	5.66	62.39
Tandem laser-A HISG	4.07	10.17	7.23	5.35	0
Tandem laser-B HISG	2.5	10.24	6.39	5.35	0
Tandem laser-C HISG	2.08	10.30	4.78	5.45	0
Tandem TCO-A HISG	10.34	7.44	1.88	5.15	0
Tandem TCO-B HISG	6.26	7.88	1.66	5.15	0
Tandem TCO-C HISG	5.16	8.21	1.23	5.15	0
a-Si TCO-A HISG	13.26	8.37	3.72	5.14	0
a-Si TCO-B HISG	8.03	9.09	3.29	5.14	0
a-Si TCO-C HISG	6.62	9.64	2.43	5.17	0