| Author: | Liu, Hongyu |
| Title: | Investigation on the actual power output of building-integrated amorphous photovoltaic claddings |
| Degree: | M.Eng. |
| Year: | 2013 |
| Subject: | Building-integrated photovoltaic systems. Photovoltaic power systems -- Mathematical models. Hong Kong Polytechnic University -- Dissertations |
| Department: | Department of Building Services Engineering |
| Pages: | xvi, 105 leaves : ill. (some col.) ; 30 cm. |
| Language: | English |
| Abstract: | This thesis aims to evaluate the influence of module temperature and solar irradiance on the power performance of amorphous silicon PV module, and to develop and verify the power generation mathematical model applied for amorphous silicon PV module. Together with the utilization of mathematical model, experimental analysis and site measurement respectively, the most important electrical parameters, including short-circuit current, open-circuit voltage, maximum power output, fill factor and system efficiency of PV module, were investigated and analyzed under various solar irradiance levels and module temperatures. In addition, the numerical model of power generation applied to amorphous silicon PV module was developed and verified using experimental analysis and site measurement. The findings demonstrated that I-V characteristics, including short-circuit current, open-circuit voltage, maximum power output, fill factor and system efficiency, were affected by the change of solar irradiance and module temperature. The short circuit current appears an upward trend with the increasing of module temperature, and gives an upward trend with the increasing of solar irradiance. The open circuit voltage shows a downward trend with the increasing of module temperature, but an upward trend with the increasing of solar irradiance. The maximum power output is observed to give a downward trend with the increasing of module temperature, but an upward trend with the increasing of solar irradiance. The system efficiency of amorphous silicon PV module shows a downward trend with the increasing of module temperature, while an upward trend with the increasing of solar irradiance. The fill factor of amorphous silicon PV module provides an upward trend with the increasing of module temperature, but an upward trend with the increasing of solar irradiance. In addition, the mathematical model of power generation applied to amorphous silicon PV module was verified. Laboratory tests and site measurement have been carried out on amorphous silicon BIPV modules. The findings indicate that the accuracy of mathematical model was high when the amorphous silicon PV module was exposed the solar irradiance of higher than 300 W/m², which means the discrepancies between experimental results and mathematical model were 4.86%. While the average discrepancy was 5.3% on the condition that amorphous silicon PV module was exposed under the solar irradiance ranging from 240 W/m²- 1100 W/m², which means that the mathematical model cannot be applied to the amorphous silicon PV module. In addition, the findings indicate that discrepancy of power output applied for amorphous silicon Photovoltaic module shifted towards lower value with the increasing of solar irradiance ranging from 0-1200 W/m2 and module temperature ranging from 0-70 °C. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b2641109x.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 4.7 MB | Adobe PDF | View/Open |
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