The Earth is under increasing
stress owing to carbon emissions. Clean energy forms constitute an area of increasing
technological interest. Geothermal energy is a clean alternative energy form that
can be harnessed from the Earth’s core. The use of geothermal energy resources is
gaining substantial interest in many countries, as an integral part of 21st century clean energy solutions and meeting stringent emission requirements. The
objective of this research is to investigate an alternative approach to clean and
renewable geothermal energy utilization through geothermal ground water pressure
applied within a water turbine. The groundwater pressure from the candidate geothermal
sites considered is applied to drive a water turbine for the generation of electrical
energy. The geothermal candidate sites are low-temperature (i.e. <60℃) geothermal springs, where it is not beneficial to apply low temperatures
in a Rankine cycle steam turbine due to the low enthalpy. Simple calculations are
conducted to estimate the electrical energy output of each candidate site. This
may technically be regarded as a thermodynamic problem, albeit one that does not
require full thermodynamic cycle analysis. The results of the simple non-rigorous
analysis indicate that the electrical energy generation potential is greater when
using geothermal water pressure (2.5 MWe) than when using
low geothermal temperature (0.005
MWe).
Cite this paper
Amoo, L. M. (2019). Low-Enthalpy Geothermal Springs for Power Generation—An Alternative Approach. Open Access Library Journal, 6, e5866. doi: http://dx.doi.org/10.4236/oalib.1105866.
Farquharson, D., Jaramillo, P. and Samaras, C. (2018) Sustainability Implications of Electricity Outages in Sub-Saharan Africa. Nature Sustainability, 1, 589-597. https://doi.org/10.1038/s41893-018-0151-8
Olowosejeje, S.A. (2019) Nigeria’s Unreliable Electricity Costs Its Economy $29 Billion a Year-Solar Power Would Save Billions. https://qz.com/africa/1632978/nigeria-solar-pow er-could-fix-costly-electricity-problems/
REN21 Renewable Energy Policy Network for the 21st Century (2011) Renewables 2011 Global Status Report. REN21 Secretariat, Par-is. http://www.ren21.net/Portals/97/documents/ GSR/REN21_GSR2011.pdf
Wu, G.C., et al. (2017) Strategic Siting and Regional Grid Interconnections Key to Low-Carbon Futures in African Countries. Proceedings of the National Academy of Sciences of the United States of America, 114, E3004-E3012. https://doi.org/10.1073/pnas.1611845114
Li, Y., et al. (2018) Climate Model Shows Large-Scale Wind and Solar Farms in the Sahara Increase Rain and Veg-etation. Science, 361, 1019-1022. https://doi.org/10.1126/science.aar5629
Oyedepo, S.O., et al. (2008) Towards a Sustainable Electricity Supply in Nigeria: The Role of Decentralized Renewable Energy System. European Journal of Sustainable Development Research, 2, Article No. 40. https://doi.org/10.20897/ejosdr/3908
Amoo, O.M.A. (2014) Thermodynamic Based Resource Classification of Geothermal Energy in Nigeria. Jour-nal of Renewable and Sustainable Energy, 6, Article ID: 033129. https://doi.org/10.1063/1.4881687
Amoo, L.M. (2018) Aperiodic Tidal Data Resource Assessment and LCOE Analysis of Selected Areas in Nigeria. Clean Energy, 2, 45-57. https://doi.org/10.1093/ce/zky007
Amoo, L.M. (2018) Tech-no-Economic Assessment of Energy Production Potential from Tidal Streams in Nige-ria. International Journal of Energy and Environmental Engineering, 9, 81-98. https://doi.org/10.1007/s40095-017-0256-2
Falcone, G., Liu, X., Okech, R.R., Seyidov, F. and Teodoriu, C. (2018) Assessment of Deep Geothermal Energy Exploitation Methods: The Need for Novel Single-Well Solutions. Energy, 160, 54-63. https://doi.org/10.1016/j.energy.2018.06.144
Olaoye, T., Ajilore, T., Akinlu-wade, K., Omole, F. and Adetunji, A. (2016) Energy Crisis in Nigeria: Need for Renewable Energy Mix. American Journal of Electrical and Electronic Engineering, 4, 1-8.
Abraham, E.M. and Nkitnam, E.E. (2017) Review of Geothermal Energy Research in Nigeria: The Geo-Science Front. International Journal of Earth Science and Geophysics, 3, 15. https://doi.org/10.35840/2631-5033/1815
Sritram, P. and Suntivarakorn, R. (2017) Comparative Study of Small Hydropower Turbine Efficiency at Low Head Water. Energy Procedia, 138, 646-650. https://doi.org/10.1016/j.egypro.2017.10.181
Brimmo, A.T., Sodiq, A., Sofela, S. and Kolo, I. (2017) Sustainable Energy Development in Nigeria: Wind, Hydropower, Geothermal and Nuclear (Vol. 1). Renewable and Sustainable En-ergy Reviews, 74, 474-490. https://doi.org/10.1016/j.rser.2016.11.162
Chukwu, C.G., Udensi, E.E., Abraham, E.M., Ekwe, A.C. and Selemo, A.O. (2018) Geothermal Energy Potential from Analysis of Aeromagnetic Data of Part of the Niger-Delta Basin, Southern Nigeria. Energy, 143, 846-853. https://doi.org/10.1016/j.energy.2017.11.040
Tchanche, B.F., Lam-brinos, G., Frangoudakis, A. and Papadakis, G. (2011) Low- Grade Heat Conversion into Power Using Organic Rankine Cycles—A Review of Various Applications. Renewable and Sustainable Energy Reviews, 15, 3963-3979. https://doi.org/10.1016/j.rser.2011.07.024