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Professor, Renewable Energy Technologies

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Prof. Wilfred Ifeanyi Okonkwo is a certified professional Engineer and a University lecturer. H holds Ph.D, M.Eng and B.Eng. in Agricultural Engineering from University of Nigeria, Nsukka (UNN) and the University of Agriculture, Makurdi, Nigeria. Prof. Okonkwo previously served as the Head, department of Agricultural and Bioresources Engineering, UNN (2012 -2016) where he instructs courses in food and bioprocess engineering, renewable energy technologies and climate.

He served as a unit Head, solar thermal at the National Centre for Energy Research and Development (NCERD) Energy Commission of Nigeria (ECN), Nsukka Centre for several years (2005 – 2006 and 2008 – 2012). In addition to University of Calabar and Federal University of Wukari, Nigeria, has was a visiting Professor at numerous Universities including Rivers State University of Technology, Port Harcourt. He has completed a number of renewable energy projects and worked as a consultant for USAID and UNIDO on the Cross River State Renewable Energy Master Plan Draft and the well-known Ebonyi State Solar Desalination of Okposi and Uburu lakes water in Ebonyi State respectively.

Research Interest

  • Food and Bioprocess Engineering
  • Renewable Energy Application/Technologies
  • Biomass/Biogas Technologies
  • Structures and Environmental Control Engineering

"Just as Houses are made of stones,
so is science made of facts "
Henri Poincare

Latest Publications

Development of a single stage roselle calyx extractor

An 8-litre capacity roselle calyx extractor was developed with Arduino based temperature controls ranging from 30 to 100?C. Performance evaluation conducted on the extractor showed that efficiency of the extractor increased as the weight of the calyces decreased at constant mass of water which ranged from 55% to 89%. The effect of extraction time (5, 10 and 15 minutes), process temperature (30, 50, 75 and 100?C) and calyx-water mass ratio (1:50, 1:20 and 1:10) on the pH, density and colour of th...



PERFORMANCE EVALUATION OF A PYRAMIDAL PASSIVE SOLAR DESALINATION SYSTEM IN NIGERIA

Performance evaluation of a pyramidal passive solar desalination system was undertaken atthe National Centre for Energy Research and Development (NCERD), University of Nigeria,Nsukka lat. 6.8oN and long. 7.29oE Nigeria using saline water samples collected from Uburuand Okposi salt lakes respectively. The solar desalination system was constructed with localavailable materials made of wooden materials and rapped in galvanized metal sheet. Thesystem has the capacity of recovering salt from s...



Optimization of Anthocyanin Extraction from Roselle (Hibiscus sabdariffa) Calyces: RSM, Kinetic Modelling, Mass Transfer and Thermodynamic Studies

Roselle calyces (Hibiscus sabdariffa) are becoming very important in the food and beverage industry, especially because of the presence of anthocyanin which is an antioxidant responsible for their red colour. The effect of processing parameters such as contact time, temperature and calyx-water ratio on the anthocyanin content of roselle calyces extract was studied and optimized along with evaluation of kinetic models, mass transfer and thermodynamic parameters. Extraction kinetics for anthocyani...