| Title | Geothermal Energy Resource Assessment of the East-African Rift Basins in SW Tanzania |
|---|---|
| Authors | Fred Beekman |
| Year | 2026 |
| Conference | World Geothermal Congress |
| Keywords | East African Rift, SW Tanzania, geothermal energy resource assessment, direct use |
| Abstract | By employing a quantitative techno-economic assessment method, the geothermal energy resource potential of SW Tanzania is assessed. The geological input is based on a new regional 3D thermo-structural model of the rift basins and upper crust in the intersection area of the eastern and western branches of the East African Rift System. Two geothermal play types are considered: hot sedimentary aquifers and permeable fault zones. The analysis evaluates the potential for three main uses of geothermal energy: direct heat utilization, cooling, and/or electrical power production. The findings indicate significant direct heating capacities of up to 45 MW. For geothermal cooling, the Runge Volcanic Province (RVP) offers more than 9 MW. The electricity generation potential is modest, with most basins under 2 MW, except for the RVP which can reach up to 8 MW. The estimated levelized cost of energy (LCOE) for direct heating and cooling are notably low, especially in the RVP, with costs mostly under 5 $ct/kWh. The LCOE for electricity generation is significantly higher everywhere, except for the Songwe Basin. The findings indicate that direct heating and cooling applications offer the largest geothermal potential in SW Tanzania. Direct heating and cooling are not only cost-effective but also requires less infrastructure and can be used locally, providing immediate benefits to communities near the geothermal sources. The results underline the significance of incorporating both power, LCOE and demand for geothermal energy in geothermal energy resource assessment. |