| Author: | Shi, Ke |
| Title: | Investigation of the techno-economic performance of photovoltaic systems in rooftop and façade areas of educational buildings |
| Advisors: | Koo, Choongwan (BSE) |
| Degree: | M.Eng. |
| Year: | 2018 |
| Subject: | Hong Kong Polytechnic University -- Dissertations Photovoltaic power systems Photovoltaic power generation -- Economic aspects |
| Department: | Department of Building Services Engineering |
| Pages: | pages : color illustrations |
| Language: | English |
| Abstract: | With the rapid growth of population and economy, the energy shortage and environmental pollution became major issues all over the world. Countries have formulated renewable energy strategies to alleviate these problems. The solar photovoltaic(PV) system directly uses solar radiation to generate electricity, which is an effective way to replace fossil fuels and mitigating the greenhouse effect. However, the high initial cost and extended payback period make it obstacles to the promotion of distributed PV systems. In this dissertation, according to a case in Shandong Province, China, the potential of solar PV system on school buildings was investigated both in technical aspect and economic aspect. The study was based on Ecotect simulation tool. Models of all buildings in the case were built. The potential of hourly and monthly solar radiation on roofs and different facades in the region were analyzed according to the simulation results. The hourly shading rate and available area in each month were also estimated by simulation. The shadow profiles of the school buildings on solstice days and equinox day were presented to analyze the shading effect by surrounding buildings. Based on the available area, the installation scenario of PV system was determined and the monthly electricity generation was evaluated by simulation. The results showed that the annual solar radiation on a horizontal plane in this region was 1,376,115 Wh/m2. The solar radiation on the south, east, west façades were 60%, 32%, and 57% of the value for the horizontal surface. The roof and south façade of the building was less affected by shadows between 9:00 and 15:00, whereas the east façade and the west façade had significant shadows for half of the daytime each day. The shading simulation results also showed the high-rise building outside the school caused the shadow on school buildings in winter. The electricity self-sufficiency rate was calculated in the last step of the technical analysis. The self-sufficiency rate for rooftop PV is 1.15, while the value for different building facades were ranged from 0.10 to 0.30. In the economic aspect, the costs, benefits, and monetary payback period of PV system on the roof and different facades were analyzed by using Net Present Value method. The results showed the monetary payback period for rooftop PV was only 8-9 years, which is shorter than other countries or regions such as Hong Kong. The reason for the short payback period in China was explained. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 991022168751303411.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.05 MB | Adobe PDF | View/Open |
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