Theoretical analysis of micro-hydropower technology for electricity generation. A case study of H... more Theoretical analysis of micro-hydropower technology for electricity generation. A case study of Hhaynu micro-hydropower plant in Tanzania Article 3 Title: Dynamic modelling and simulation of a micro-hydro turbine system with hydrogen fuelled internal combustion engine for supplying electricity to off-grid rural community. A case study of Hhaynu micro-hydropower plant in Tanzania Article 4 Title: Optimization model of a micro-hydro turbine power supply to consumer load demand for off-grid rural community. A case study of Hhaynu micro-hydropower plant in Tanzania Article 5 Title: Design and simulation of a micro-hydro turbine system for electricity supply and hydrogen production in off-grid rural community of Tanzania
The objective of the study has been to determine the river discharge by measuring the river flow ... more The objective of the study has been to determine the river discharge by measuring the river flow velocity using two different measurement methods together with the area method and compare the accuracy of the results. Two river flow velocity measurement methods were used, the floating method and the use of current meter. In floating method a floating object was used to determine the water flow velocity on the surface by allow a float to move a distance of 1 meter along the river and record the time it takes to travel that distance in seconds. Ten readings were taken and manually recorded and the flow velocity was determined by taking the distance travel by the float (1m) divide by the time taken by the float (in seconds). On the other hand, the current meter method measure directly the average flow velocity across the river depth, twenty readings were taken and recorded manually and the average velocity were calculated. The use of current meter display flow velocity directly without the need of calculations. The result shows that both methods produce very close value, but the floating method have displayed higher value of around +2% than current meter method which is a good value, despite the fact that floating method measures the surface velocity and the use of calculation. Many literature highlighted the accuracy of flow velocity measurement using current meter due to the fact that it measures the average velocity across the river, but from the findings when the floating method flow velocity measurement is properly applied it will produce as accurate results as the current meter with a fraction of cost in terms of instrument cost and expertise requirement in measurements. The floating method flow velocity measurement method could be applicable as alternative to current meter in micro hydropower projects river flow measurements in rural areas of developing countries with limited funding and local expertise.
Small hydropower resources can play a very important role in providing electricity and power to t... more Small hydropower resources can play a very important role in providing electricity and power to the remote and rural areas of Tanzania where there is no feasible future for the grid extension. These types of small schemes can generate electricity up to a range of 1 MW. Tanzania has substantial number of small hydropower potential sites for electricity generation and to date it is estimated to be around 315 MW, however, only about 25MW (8%) of this potential have been developed so far, which means several number of potential sites, have not been studied and documented or have not been developed. This research presents the results of the feasibility study of six (6) untapped and un-studied small hydropower potential sites in Tanzania. The methodology used in this research was based on site visits, data measurements and collection (hydrological and Energy demand), information gathering, interviews and consultation, data analysis, designs and cost estimation. The results showed that all the six (6) small hydropower sites studied are feasible and can potentially been developed to produce and supply cost effective electricity to the local off-grid areas as small hydropower plants.
Theoretical analysis of micro-hydropower technology for electricity generation. A case study of H... more Theoretical analysis of micro-hydropower technology for electricity generation. A case study of Hhaynu micro-hydropower plant in Tanzania Article 3 Title: Dynamic modelling and simulation of a micro-hydro turbine system with hydrogen fuelled internal combustion engine for supplying electricity to off-grid rural community. A case study of Hhaynu micro-hydropower plant in Tanzania Article 4 Title: Optimization model of a micro-hydro turbine power supply to consumer load demand for off-grid rural community. A case study of Hhaynu micro-hydropower plant in Tanzania Article 5 Title: Design and simulation of a micro-hydro turbine system for electricity supply and hydrogen production in off-grid rural community of Tanzania
The objective of the study has been to determine the river discharge by measuring the river flow ... more The objective of the study has been to determine the river discharge by measuring the river flow velocity using two different measurement methods together with the area method and compare the accuracy of the results. Two river flow velocity measurement methods were used, the floating method and the use of current meter. In floating method a floating object was used to determine the water flow velocity on the surface by allow a float to move a distance of 1 meter along the river and record the time it takes to travel that distance in seconds. Ten readings were taken and manually recorded and the flow velocity was determined by taking the distance travel by the float (1m) divide by the time taken by the float (in seconds). On the other hand, the current meter method measure directly the average flow velocity across the river depth, twenty readings were taken and recorded manually and the average velocity were calculated. The use of current meter display flow velocity directly without the need of calculations. The result shows that both methods produce very close value, but the floating method have displayed higher value of around +2% than current meter method which is a good value, despite the fact that floating method measures the surface velocity and the use of calculation. Many literature highlighted the accuracy of flow velocity measurement using current meter due to the fact that it measures the average velocity across the river, but from the findings when the floating method flow velocity measurement is properly applied it will produce as accurate results as the current meter with a fraction of cost in terms of instrument cost and expertise requirement in measurements. The floating method flow velocity measurement method could be applicable as alternative to current meter in micro hydropower projects river flow measurements in rural areas of developing countries with limited funding and local expertise.
Small hydropower resources can play a very important role in providing electricity and power to t... more Small hydropower resources can play a very important role in providing electricity and power to the remote and rural areas of Tanzania where there is no feasible future for the grid extension. These types of small schemes can generate electricity up to a range of 1 MW. Tanzania has substantial number of small hydropower potential sites for electricity generation and to date it is estimated to be around 315 MW, however, only about 25MW (8%) of this potential have been developed so far, which means several number of potential sites, have not been studied and documented or have not been developed. This research presents the results of the feasibility study of six (6) untapped and un-studied small hydropower potential sites in Tanzania. The methodology used in this research was based on site visits, data measurements and collection (hydrological and Energy demand), information gathering, interviews and consultation, data analysis, designs and cost estimation. The results showed that all the six (6) small hydropower sites studied are feasible and can potentially been developed to produce and supply cost effective electricity to the local off-grid areas as small hydropower plants.
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Papers by DANIEL NGOMA