This research was carried out to investigate the effects of cooling on Photovoltaic (PV) module performance in a tropical region. A Photovoltaic module system was set up in an outdoor environment to expose it to real life operating conditions at the Quadrangle, Faculty of Technology, University of Ibadan, Oyo State, Nigeria (7°24´7.0632´´N, 3° 55´ 2.3268´´E), where all the measuring devices were connected to extract all data that determine the power generated by the PV. The experiment was repeated under water cooling condition. Time series analysis was performed on the data collected from the experimental set up. The results indicated that under water cooling condition, the temperature decreased maximally by . ℃. This leads to a percentage increase of . % of the open circuit voltage, the maximum power delivered by the PV module also increases by . % and this effectively increases the conversion efficiency of the PV module by . %. The cooling arrangement maintains the temperature to a certain limit, between .° and .°thereby avoiding long term thermal degradation. The result of this work further corroborated the results of works done from the temperate region.

This research was carried out to ascertain the relationship between effective reservoir management and hydropower station performance selecting the Jebba Hydroelectric Power Station as a case study. In order to achieve this, the daily inflow and outflow data, as well as the generated energy were collected for the reviewed period (2009 -2016). The hydrological data indicated that during period under study, the reservoir is recovering at a very low rate. A further analysis was carried out by comparing the conversion efficiency of the energy in flowing water and actual energy generated. Thus the product of the head (metres) and the outflow was plotted against the actual energy generated. The results satisfied a linear relationship having a correlation coefficient of 0.7059 which reinforces the knowledge of the effects of hydropower reservoir management on energy generation.

The Distribution System can be seen as the networking line that interfaces between the large power generators and transmission lines on one hand and the electricity consumers on the other. The system can exist in different topologies among which, the radial form is popular because of its simplicity and comparative low cost of design. The problem of poor power quality and instability has been a major power systems challenge especially in Nigeria. More reliable and stable power systems among other benefits can be enjoyed when system are optimized. Hence, this paper implements the feeder reconfiguration technique as an optimization procedure to minimize the technical losses on the Ondo Road 11kV Feeder Segment. MATLAB is employed to simulate the optimization process and the results showed that an average of 85.47% active power loss reduction on all phases is obtainable with the proposed technique leading to an estimated financial saving of ?639,999.75 per hour.