Strategies for harvesting large scale bulk energy from the Congo river without a conventional dam
The paper provides a summary of the investigations into the capability of the Congo river to support an evolutionary design approach based on the run of river, low head, and hydro-electric generation technology, as employed at the existing Inga 2 power station in the Democratic Republic of Congo. The evolutionary approach builds on existing infrastructure. The results show that the footprint is much smaller. The environmental impact is minimized. These collectively will contribute to lower capital costs. In summary, 10,000 cm3/sec of constant river flow will produce 5,000 MW of base power. On average, the constant recorded flow of the river is 30,000 cm3/sec and a total of 15,000 MW of base power generation is possible.
Africa—Integrated gas and electricity transmission planning in power generation and HVDC engineering in harnessing large-scale hydroelectric sites for interconnected regional power systems
This Paper discusses integrated gas and electricity transmission planning in power generation and energy development in Africa with their benefits, and developments in HVDC Engineering Technology in harnessing large-scale hydroelectric sites for interconnected regional power systems. It focuses on the present status and future prospect of electricity infrastructure from the viewpoint of generation and transmission development, policies and lessons from global deregulation, advances in global research, and development (R&D) and strategies to influence Africa’s integration into the Global transition to knowledge-based economies. It examines regional power pools as an economic development paradigm by emphasizing the systems effects that lead to improving economical, ecological and technological efficiencies by the joint operation of power systems.The paper goes on to discuss the energy crisis and development issues in Africa (strategic diagonal and convergent approach with components), the Southern African power pool development plan, and the Southern African short-term energy market. Active projects such as the Westcor project representing an initial phase of the large regional South African Power Pool are also discussed. The project showcases the new milestones in HVDC technology used to harness large hydro potential contributing to the pool. Also discussed is interconnection of the Gulf States that will facilitate reserve sharing between the systems and electricity trading between the Gulf States.
A comprehensive review of the solar dryer
ABSTRACT Drying of agricultural products is an energy-demanding process. High costs, scarcities in fossil fuels and environmental threats attract the use of solar energy as an alternate source, especially in developing countries. Increasing environmental concerns led to the use of clean and green energy resources in the field of drying agricultural products. A solar dryer integrated with a thermal energy storage system is reasonably efficient for continuous and uniform drying of agricultural produce in the temperature range of 40–75°C which is the requisite for drying most of the products. Such dryers have become a natural choice to replace drying systems based on fossil fuels. Many studies have been performed till date by a number of researchers for the last few decades for drying agriculture and food products by a solar dryer. This review paper primarily presents an appraisal of the significant contributions made so far in the field of solar drying systems, with the latest updates in drying technology. Solar dryers which offer drying during off-sunshine hours have been specially mentioned. Some novel ideas like use of phase change materials and desiccant materials which enhance the performance and effectiveness of the dryer have also been attempted.