Optimization of the design and manufacture of a solar-wind hybrid street light
- Nyemba, Wilson R., Chinguwa, Simon, Mushanguri, Innocent, Mbohwa, Charles
- Authors: Nyemba, Wilson R. , Chinguwa, Simon , Mushanguri, Innocent , Mbohwa, Charles
- Date: 2019
- Subjects: Diffuser , Photovoltaic module , Renewable energy
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/402349 , uj:33666 , Citation: Nyemba, W.R. et al. 2019. Optimization of the design and manufacture of a solar-wind hybrid street light. Procedia Manufacturing, 35:285–290. https://doi.org/10.1016/j.promfg.2019.05.041
- Description: Abstract: The demand for electricity has escalated and cannot be fulfilled by conventional energy sources alone. There has been a rising demand to seek new renewable energy sources. Although solar and wind energy are the most cost effective renewable energy sources, they are unreliable due to the sporadic nature of their occurrence, if implemented as standalones. In Zimbabwe, solar street lighting has been implemented since 2014 as a solution to the erratic power supplies and outages. Wind potential in Zimbabwe has been identified at elevated heights, with Gweru having the maximum power density of 115 W/m2 at 50 m hub height. This paper presents the optimization of the design of a hybrid renewable energy system (HRES) of solar and wind energy to power a 160W streetlight. The system consisted of a wind turbine, photovoltaic modules, charge controller, battery bank and lights. The system sizing was done in Excel using wind and solar data obtained from the database, HOMER Software Package and PVSyst. The 3D streetlight was modelled using Inventor Professional and a working prototype was manufactured. The results showed that the HRES reduced the energy storage requirements by 38.75% with an overall cost reduction of 14.4%, relative to a standalone solar streetlight. The diffuser effect to the turbine was experimentally assessed, showing 69.3% increase in turbine power output and a 50% decrease in energy storage requirements. Further research can be carried to improve the reliability for standalone systems.
- Full Text:
- Authors: Nyemba, Wilson R. , Chinguwa, Simon , Mushanguri, Innocent , Mbohwa, Charles
- Date: 2019
- Subjects: Diffuser , Photovoltaic module , Renewable energy
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/402349 , uj:33666 , Citation: Nyemba, W.R. et al. 2019. Optimization of the design and manufacture of a solar-wind hybrid street light. Procedia Manufacturing, 35:285–290. https://doi.org/10.1016/j.promfg.2019.05.041
- Description: Abstract: The demand for electricity has escalated and cannot be fulfilled by conventional energy sources alone. There has been a rising demand to seek new renewable energy sources. Although solar and wind energy are the most cost effective renewable energy sources, they are unreliable due to the sporadic nature of their occurrence, if implemented as standalones. In Zimbabwe, solar street lighting has been implemented since 2014 as a solution to the erratic power supplies and outages. Wind potential in Zimbabwe has been identified at elevated heights, with Gweru having the maximum power density of 115 W/m2 at 50 m hub height. This paper presents the optimization of the design of a hybrid renewable energy system (HRES) of solar and wind energy to power a 160W streetlight. The system consisted of a wind turbine, photovoltaic modules, charge controller, battery bank and lights. The system sizing was done in Excel using wind and solar data obtained from the database, HOMER Software Package and PVSyst. The 3D streetlight was modelled using Inventor Professional and a working prototype was manufactured. The results showed that the HRES reduced the energy storage requirements by 38.75% with an overall cost reduction of 14.4%, relative to a standalone solar streetlight. The diffuser effect to the turbine was experimentally assessed, showing 69.3% increase in turbine power output and a 50% decrease in energy storage requirements. Further research can be carried to improve the reliability for standalone systems.
- Full Text:
Waste heat and energy recovery system from smelter off-gas for a platinum processing plant
- Nyemba, Wilson R., Mushanguri, Innocent, Chinguwa, Simon, Mbohwa, Charles
- Authors: Nyemba, Wilson R. , Mushanguri, Innocent , Chinguwa, Simon , Mbohwa, Charles
- Date: 2017
- Subjects: Energy , Heat , Recovery
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/257785 , uj:27088 , Citation: Nyemba, W.R. et al. 2017. Waste heat and energy recovery system from smelter off-gas for a platinum processing plant. Proceedings of the 2017 International Symposium on Industrial Engineering and Operations Management (IEOM) Bristol, UK, July 24-25, 2017.
- Description: Abstract: Most mineral processing companies are energy intensive especially if smelting is used in extraction. After processing, the energy is correspondingly dissipated as heat and toxic gases, requiring stringent controls for sustainability and safety. In recent years, Southern Africa has grappled with power shortages resulting in the scaling down of company operations. Increases in manufacturing activities demand for more energy but this has evidently outstripped supply due to the depletion of natural resources. Mineral processing industries are probably the worst affected due to fluctuations in world metal prices. These challenges require sustainable production strategies to remain in business. This research was carried out at a platinum processing company in Zimbabwe which uses smelting in extractive metallurgy, consuming millions of dollars in energy but also dissipating this as heat and furnace exhaust gases. The focus of the research was on finding ways to turn these challenges into opportunities by recovering the heat and using it for other purposes. A waste heat and energy recovery system was designed to work in conjunction with the smelters and electrostatic precipitator. The proposed system is expected to increase furnace efficiency by 8.5% with an anticipated output of 1.033 MW and an overall plant efficiency of 22.7%.
- Full Text:
- Authors: Nyemba, Wilson R. , Mushanguri, Innocent , Chinguwa, Simon , Mbohwa, Charles
- Date: 2017
- Subjects: Energy , Heat , Recovery
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/257785 , uj:27088 , Citation: Nyemba, W.R. et al. 2017. Waste heat and energy recovery system from smelter off-gas for a platinum processing plant. Proceedings of the 2017 International Symposium on Industrial Engineering and Operations Management (IEOM) Bristol, UK, July 24-25, 2017.
- Description: Abstract: Most mineral processing companies are energy intensive especially if smelting is used in extraction. After processing, the energy is correspondingly dissipated as heat and toxic gases, requiring stringent controls for sustainability and safety. In recent years, Southern Africa has grappled with power shortages resulting in the scaling down of company operations. Increases in manufacturing activities demand for more energy but this has evidently outstripped supply due to the depletion of natural resources. Mineral processing industries are probably the worst affected due to fluctuations in world metal prices. These challenges require sustainable production strategies to remain in business. This research was carried out at a platinum processing company in Zimbabwe which uses smelting in extractive metallurgy, consuming millions of dollars in energy but also dissipating this as heat and furnace exhaust gases. The focus of the research was on finding ways to turn these challenges into opportunities by recovering the heat and using it for other purposes. A waste heat and energy recovery system was designed to work in conjunction with the smelters and electrostatic precipitator. The proposed system is expected to increase furnace efficiency by 8.5% with an anticipated output of 1.033 MW and an overall plant efficiency of 22.7%.
- Full Text:
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