Researchers have shown that the theoretical optimum tilt for the production of solar energy on the roof in cheap buildings in Nigeria is approximately 5.67 °. Their modeling suggests that the roofs facing PV generation in the Global South are assuming.
Scientists from the Durban University of Technology in South Africa have investigated the optimized roof field corners for integrating PV systems into cheap buildings.
“In the Global South (GS), access to affordable, reliable electricity remains challenging, especially in homes with a low income. Solar PV emerges as the most suitable option for renewable energy, which uses“ this study focuses on bridging access to energy companies, affordability and sustainability of their susceptibleness to their susceptibleness to their suitable income with great income of their suitable income in their faults and their suitability with great income from a great income of their suitable income by having their suitable income. Evaluate in cost -effective, sustainable housing projects. “
The group developed a computer model using the PVSol simulation software, in which they investigated PV performance under different circumstances. The system was simulated to work in a rural area in southern Nigeria.
For the experimental setting, the irradiation there was measured on 140–165 kWh/m²/month, with a global horizontal irradiation (GHI) from 1926.01 kWh/m²/year/year and an average temperature of 25.9 C. The house was supposed to have a yar with a surface of 140 m². The roof could accommodate 80 W to 300 W PV modules, with 40 modules on the north side and 40 on the south side. The capacity was 24 kW.
According to the researchers, a tilt of 25 ° is the minimum needed to create space for 80 PV modules. That is why the angle of the roof tilt facade was simulated in the range of 25 ° to 45 °. In addition, the researchers have considered cases in which the PV modules are installed on just one facade (the north or southern roof) or both.
“Dakveld influences usable PV installation area, in particular on steep roofs. The theoretical optimum tilt for energy production at this location is approximately 5.67 °. A 25 ° cloo possibly, however, sufficient space for 80 panels (300 W each) to reach the designed 24 kW capacity,” the Academici mentions.
On the south -facing roofs, 8% were found to receive more solar radiation (1,845.93 kWh/m2) than roofs on the north (1,710.12 kWh/m2), with the north -facing roofs a slightly higher performance ratio (87.04% versus 86.09%). Furthermore, the group discovered that energy generation was higher in the south -facing roof at 19,082.96 kWh/ year, which is 6.8% more than the roof of the north at 17.873.97 kWh/ year.
In addition, the simulations showed that the system avoids approximately 18,703 kg of CO2 emissions per house annually, a total of 1,870,300 kg/year for an estate of 100 units. As a result, the team has recommended that policy makers in the Global South Mandate PV systems on the roof in cheap homes.
“Giving priority to the orientation on the southern panel to maximize exposure to solar radiation,” the researchers concluded. “Where two-sided assembly is used, you ensure a higher capacity use of the roof on the south. This can be included in the building plan during the layout and design phases.”
Their findings were presented in “Integration of the PV system on the roof in a cheap building plan: a path to improving access to energy consumption and environmentalism“Published in Energy and buildings.
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