Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29229
Title: Environmental payback time analysis of a roof-mounted building-integrated photovoltaic (BIPV) system in Hong Kong
Authors: Lu, L 
Yang, HX 
Keywords: Building-integrated photovoltaic
Embodied energy
Environmental payback time
Issue Date: 2010
Publisher: Pergamon Press
Source: Applied energy, 2010, v. 87, no. 12, p. 3625-3631 How to cite?
Journal: Applied energy 
Abstract: This paper reports the investigation results of the energy payback time (EPBT) and greenhouse-gas payback time (GPBT) of a rooftop BIPV system (grid-connected) in Hong Kong to measure its sustainability. The 22. kWp PV array is facing south with inclined angle of 22.5°. The hourly solar irradiance and ambient air temperature from 1996 to 2000 were used as weather data input. The annual power output was found to be 28,154. kWh. The embodied energy for the whole system in the lifespan was 205,816. kWh, including 71% from PV modules and 29% from balance of system (BOS). The percentage of embodied energy for silicon purification and processing reached 46%. The EPBT of the PV system was 7.3. years, and the GPBT was estimated to be 5.2. years considering fuel mixture composition of local power stations. This paper also discussed the EPBTs for different orientations, ranging from 7.1. years (optimal orientation) to 20.0. years (west-facing vertical PV façade). The results show that the 'sustainability' of a PV system is affected by its installation orientation and location. Choosing locations and orientations with higher incident solar irradiance is one key for the sustainability of BIPV technology applications.
URI: http://hdl.handle.net/10397/29229
ISSN: 0306-2619
EISSN: 1872-9118
DOI: 10.1016/j.apenergy.2010.06.011
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

67
Last Week
1
Last month
0
Citations as of Sep 11, 2017

WEB OF SCIENCETM
Citations

60
Last Week
0
Last month
0
Citations as of Sep 22, 2017

Page view(s)

69
Last Week
1
Last month
Checked on Sep 18, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.