The concept HYINGA combines the development of hydroelectric potential of Inga III (4.5 GW) and Grand Inga (39GW) for the electrification of Sub-Sahara in Africaand the extent of such naturally produced electricity to produce hydrogen forthe global market.
The electrification of Africa is operated by the mean of the direct electrical current transmission through high-voltage cables to different end destinations in the continent. The rationale of choosing this method is to avoid the heat losses for the transmission distances longer than 700km.
The electrical direct current can also supply electricity to hydrogen electrolyser for its production. The electricity generated at the Inga Dam will be sent up to Moanda on the Atlantic coast, the distance of transmission is approximately 150 km. A hydrogen production facility should be established at Moanda and uses electricity and fresh watertaken then filtered from the river to electrolysis hydrogen. Two existing electrolyser modular, either alkaline or PEM can be applied for the production depending on the rationale of cost or efficiency.
The produced hydrogen needs to be liquefied at -253 ° C until sufficient scale to be shipped to the various destinations. Nowadays, the most successful design for the liquefied hydrogen transportation was proposed by a consortium of Japanese manufacturers: a catamaran vessel (SWAPH - Small Waterplane Twin Hull) of 200000 m³ with carrying capacity of 14000 tons of liquefied hydrogen. The rate of boiling is 0.2 to 0.4% per day. And the hydrogen steams supplies power to turn the vessel's engine. The similar method is also applied for LNG ships.
To accomplish the HYINGA project, it requires the infrastructure of a deepwater port at Banana to host the boats with liquefied hydrogen tanks for the shipment. Once the hydrogen shipment reaches its destination harbor, the local distribution will be transported either through pipelines in form of gas,or in the form of liquid and transported by railway or by trucks.