globusjournal

The world alone cannot thrive and relies on energy production and expenditure. In an ideal scenario, all the energy produced worldwide would be clean and renewable; however, that is not the case. Most developed countries have already taken steps toward a green future, except developing countries that rely heavily on fossil fuels. Determining the costs of transitioning to a purely renewable energy-reliant future is essential for a developing country like the Philippines. One viable source of renewable energy sources is salinity gradient energy. The study aims to identify if salinity gradient energy can be a viable energy source. The researchers selected specific locations across Las Piñas, specifically Zapote and Las Piñas rivers, to show if the subject Location fits the conditions as a source of salinity gradient energy. Using the mathematical model expressed by Hsu et al. (2021), Location A can only generate approximately 0.0005 kWh per cubic meter of saltwater and freshwater mixed. Location B can only generate approximately 0.0004 kWh per cubic meter of saltwater and freshwater mixed. It would take 1000 and 1250 times the amount of fresh water and salt water from Location A and Location B, respectively, to match the energy output calculated by Hsu et al. The amount of energy harnessed from these rivers is insignificant due to its concentration difference.

Keywords: Salinity Gradient Energy; Carbon Emissions; Fossil Fuel; Reverse Electrodialysis; Energy Conversion.