Tuesday, 24 February 2015

Is it time for Uganda to look at alternative Renewable energy sources?

Blessed with the largest fresh water lake in Africa (Lake Victoria), Uganda has for many years relied on hydro-electric power to meet her energy needs. With a current total energy supply of 849.5 MW, the presently installed capacity of 695.13 MW from hydro-energy sources alone accounts for close to 82% of Uganda’s energy supply.


However for a long time now, Lake Victoria the main reservoir for the country’s hydro dominated electric power system has suffered a challenge of decreasing water levels caused by climate change and global warming. As a result, majority of the power plants are unable to generate power at their installed capacities.
Considering the present shortages in power supply, it is crucial for the government to develop a strategy to diversify the energy sources by developing the alternative available energy sources within the country. The current energy supply alone cannot meet the rising demand. It is also noteworthy that due to the old age and inadequacy of the existing network, power cuts are frequent as maintenance works proceed and in some cases grid reinforcement is done to meet the growing energy demands of the load centers.

A viable solution to this – Renewable Energy. Wind, solar, and biomass are three emerging renewable sources of energy in the world today. Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale such as sunlight, wind, rain, tides, waves and geothermal heat. As noted in The Renewable Energy Policy for Uganda, Uganda has considerable renewable energy resources for energy production and the provision of energy services, yet they remain unexploited, largely due to the perceived technical and financial risks. These resources include: biomass, geothermal, large scale hydro, mini/micro/pico hydro, wind and solar energy. However, with the exception of biomass, whose contribution is very significant, the remaining renewable sources (including large hydro energy sources), contribute about 5% of the country’s total energy consumption. This limits the scope and productivity of economic activities that can be undertaken in any part of the country. Thus it is imperative that the use of these abundant resources should be enhanced.
Studies completed in 2004 gave the potential of the different sources as indicated in the table below.

Source: Alternative Energy Sources Assessment Report, 2004, National Biomass Assessment Study 2003

With emphasis being put on Distributed Generation (power generation at the point of consumption), sources like solar energy, bio-energy which can be built to match requirements of specific consumers and industries offer a very viable and cost effective solution to cover the energy supply gaps while eliminating common issues concerned with power distribution and transmission like the cost, complexity, inter-dependencies, and inefficiencies. This will result in improved power reliability in the country, a key ingredient for accelerated economic activities and development.