  This paper aims to evaluate the economic viability of the
energy-water-hydrogen (EWH) nexus as a new solution for reducing carbon
emissions from power systems. The urgency around climate change emphasizes the
pressing need to mitigate carbon emissions, especially from the electricity
sector, which accounts for a significant portion of total emissions in the US.
In response, incorporating more renewable energy sources (RESs) and green
hydrogen, created through water electrolysis and RES, stands out as a crucial
strategy to combat climate challenges. We delve into various aspects of the EWH
nexus, including carbon emissions from different power plants, capturing these
emissions, and potential options for their reuse or storage. This paper
involves modeling different sections of the EWH nexus and conducting an
economic analysis across scenarios in power plants to determine optimal water
supply methods, suitable chemical products for carbon reuse, and an appropriate
carbon emission penalty to encourage emission reduction through the EWH nexus.
The results indicate that reusing captured carbon emissions emerges as the most
beneficial option across all power plant types. This finding underscores the
potential of carbon reuse as a pivotal strategy within the EWH nexus framework
for addressing carbon emissions.
