Abstract
Hong Kong’s government has recently introduced the feed-in tariff scheme to promote the photovoltaic (PV) system as a promising way to address global warming. The feed-in tariff scheme depends on the type of the PV system and its installed capacity. This study aimed to investigate the techno-economic feasibility of mono-Si and poly-Si PV systems in the rooftop area of a commercial building, Pao Yue-Kong Library of Hong Kong, under the feed-in tariff scheme. The analysis was carried out in two phases: (i) technical analysis of the rooftop PV systems by considering the shading effect and solar radiation and (ii) economic feasibility of the rooftop PV systems under the feed-in tariff scheme from the life cycle perspective. The main findings of the case study can be summarized: (i) the rooftop area of the target building would not be significantly affected by surrounding buildings; (ii) the highest amount of solar radiation was estimated at 136.96 kWh/m2 in October, while the lowest value was 55.64 kWh/m2 in February; (iii) the total amount of module energy yield from the mono-Si PV system was estimated at 917.58 kWh/kW, indicating that it was very similar but a little bit lower (i.e., 0.48%) than that for the poly-Si PV system (i.e., 921.98 kWh/kW); and (iv) payback periods for mono-Si and poly-Si PV systems were estimated at 8.67 and 8.31 years, respectively. The feasibility study can contribute to providing facility managers with a practical guideline to determine the appropriate strategy in implementing the PV systems in buildings under the feed-in tariff scheme.
Highlights
The result of the payback ducted in three steps (i.e., the establishment of a reference model, an installation planconfor signed in two phases: (i) technical analysis of the rooftop PV systems, which was period was approximately as same as mainland China, and it was much shorter than that the PV system considering the shading effect, and an estimation ofinstallation the amountplan of solar ducted in threeby steps
This study aimed to investigate the techno-economic feasibility of mono-crystalline silicon (mono-Si) and poly-crystalline silicon (poly-Si)
PV systems in the rooftop area of a commercial building under the feed-in tariff scheme
Summary
Since global warming has become a worldwide issue, it was emphasized in the Paris. Agreement in December 2015 that the increase in the global average temperature should be limited to 2 ◦ C above the pre-industrial levels [1]. The decarbonization of the conventional energy system is considered an effective way to cope with the global warming problem. In this aspect, renewable energy resources can play a crucial role in reducing the use of fossil fuels and realizing energy system transformation [2]. Renewable energy resources (e.g., solar, wind, geothermal, biomass, etc.) will never run out, and will not emit greenhouse gases or atmospheric pollutants. The solar photovoltaic (PV) system, which directly converts sunlight into electricity, is the most widely used approach because of its safe, reliable, efficient characteristics
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