ENERGY ANALYSIS OF JEBBA HYDROPOWER PLANT

Odesola I F, Alabi A, Ajide O O, Fasogbon S K

Abstract


Jebba hydro power station is one of the largest singularly installed electricity generation plants in Nigeria with generating capacity of 540-560 MW. In this work, energy efficiency of the power generating and transmitting plant (Jebba) was analysed. The analysis was carried out using efficiency of supply, seasonal variation of the hydro dam as well as technical losses in the process of transmission. Results of the study showed that power generating units numbers 1 and 5 (2G1 and 2G5 respectively) have the highest amount of energy generated throughout the period under consideration. The units generated a total of 3,471,931 MWh and 2,976,845 MWh respectively while 2G6 unit has extremely low amount of energy generation  of 1,163,516 MWh. On a general note, the order of  total energy generated in the six production units was found to be  :  2G6<2G4<2G2<2G3<2G5<2G1  for  the  period  2006-2011.The 2G6 was found to be the most unreliable generating unit when compared to the remaining five units. Low plant availability of 2G6 unit, the unstable grid system and seasonal variation of water were identified as the key factors responsible for the reduction in the efficiency of the power plant. Based on the available data over the period (the estimated efficiency of supply and production, overall efficiency of the plant and the seasonal variation in energy generated), this study has shown that the hydropower station energy generation pattern has been relatively stable. The energy generation operations had been very effective and reasoned to be at optimum efficiency. However, the irregularity of plant loading and breakdown of 2G6 generating unit hindered the attainment of higher operation efficiency compared to the results of this study. Regular overhaul of the plant is recommended as one of the major strategies for minimising the identified challenges facing the attainment of higher optimum efficiency. Overall, there is a strong conviction that the plant operating efficiency will be in upward of 90 % in the years ahead if researchers further intensify their solutions strategies efforts on the plant  operation hitches

Full Text:

PDF

References


Adamu, M.Z., Adegboye, B.A., Bajoga, B.G., Ambafi,

J.G. and Omokhafe, J.T.2012. Reliability evaluation of Kainji hydroelectric power station in Nigeria. Journal of Energy Technologies and Policy 2(2). www.iiste.org.

Aminu, M.A. and Kangiwa, U.G.2011.Performance evaluation and efficiency improvement for Jebba, Kainji and Shiroro hydropower schemes. Adaptive Science and Technology: 3rd IEEE International Conference: Abuja. 115-118

Choong-Sung,Y., Jin-Hee, L. and Myung-Pil, S.2010. Site location analysis for small hydropower using geo-spatial information system. Renewable Energy 35: 852-861.

Clara, B.V. and Ấngela, P.F.2012.Performance assessment of hydropower plants. 4th workshop on efficiency and productivity analysis efficiency in the health sector.

Dariusz, M.L.2011.Investigation of the potential for improving the efficiency of turbines of hydroelectric power generation stations of ALPIQ, The Master Thesis, The School for Renewable Energy Science.

Douglas, G.H., Kelly, S.R., Julie, B.,Randy D.L.,Gregory,

R.C. and Garold, L.S.2006. Feasibility assessment of the water energy resources of the United States for new low power and small hydro classes of hydroelectric plant. US Department of Energy Efficiency and Renewable Energy, Wind and Hydropower Technologies program, Idaho Operations Office.

Emoabino, I.U., Waheed, A.A. and Bamgboye, O.A.2007. Tail water recycling for higher efficiency in hydropower- case study of Kainji-Jebba hydropower Dams in Nigeria. International Conference on Small Hydropower-Hydro Sri Lanka, 22-24 October.1-10 Gökhan, K.,Halit ,L.Y. and Hakan, F.O.2009. Evaluation of energy efficiency using thermodynamic analysis

in a hydropower plant: A case study. Renewable Energy 34 (6):1458-1465

Ibrahim, Y.2013.Renewable energy status of electricity generation and future prospect of hydropower in Turkey. Renewable Energy 50:1037-1043

Ismaila, H.Z.2006.Hydropower resources in Nigeria. Second Hydropower for today conference, International centre on small hydropower.China.

Loice, G. and Ignatio, M.2013. Efficiency improvement of pelton wheel and cross flow turbines in micro-hydropower plants: Case study. International Journal of Engineering and Computer Science 2(2): 416-432.

Milena, P.,Marko, U., Ana, M.,Jovana, B. and Zeljko, B.2013.Small hydropower plants in Serbia: Hydropwer Potential, Current State and Perspectives. Renewable and Sustainable Energy Reviews 23:341-349.

Osueke, C.O., Uguru-Okorie,D.C. and Abanihi, V.K.2013. Electricity stability in Nigeria through increased hydropower generation. International Journal of Emerging Technology and Advanced Engineering 3 (1):9-13.

Tyler, G. and Hicks, P.E.2012. Hydroelectric energy power. Handbook of Energy Engineering Calculations. McGraw-Hill Professional , Access Engineering.

Vassilis, D., Constandinos, K.,Aggelos, K. and Stella, S.2010.Efficiency evaluation of hydroelectric power plants using data envelopment analysis. Journal of Applied Operation Research 2(2):94-99.

Yan, D. and Xiangzhen, Y.2010.Efficiency of kinetic hydropower system. Power Electronics for Distributed Generation Systems (PEDG): 2nd IEEE International Symposium.

Ying Z., Xudong, F. and Jiahua, W.2013.Evaluation of power generation efficiency of cascade hydropower plants: A case study. Energies 6:1165-1177