Why should we use seawater electrolysis equipment for fuel cell power generation?
When sterilizing coolant in nuclear and thermal power plant or as byproduct reaction in the Chlor-Alkali chemical plant, there is a reaction which produces sterilization solution of hypo-chlorous acid (HClO+H2O: Strongly acid electrolysis water). In this reaction, sodium chloride (NaCl) and water (H2O) are compounded together, generating sodium hypochlorite (NaOCl) and byproduct hydrogen (H2). We use this hydrogen as a fuel in fuel cell Power Plant and the remaining hydrogen is recycled to produce high value added chemical product.
2. Background : Key principles of technology
The electricity generated in fuel cell Power Plant can be sold in a price of more than three times (0.2$/kWh) higher than normal industrial electric charge (0.07$/kWh) under RPS (Renewable Portfolio Standard) Policy to Korea Electric Power Corporation (KEPCO) or Korea Power Exchange (KPX). In addition, the left hydrogen can be stored in the hydrogen station and sold after refining process or used to produce high value added chemical products , i.e. caustic soda, ammonia, urea and PVC.
3. Benefits and Economic feasiblity
Installation operation of fuel cell power plants and hydrogen charging stations in nuclear power plants and thermal power plants => Provides national wide charging station for fuel cell vehicles when traveling long distances between cities
Securing large-capacity hydrogen purification / storage / generation / operation technology for MW-class seawater electrolytic fuel cell power generation linked with other renewable energy (i.e. offshore wind power) => Accelerating the realization of hydrogen economy
Possible to develop various linked projects such as Hydrogen charging station, EV charging station, CCS technology and microgrid.
Early commercialization is possible by utilizing the existing infrastructure
Use of seawater electrolysis equipment for nuclear power plants / thermal power generation => minimum fuel price, initial investment cost secured
• Net Present Value of this business using DCF method is NPV(3 years)~ 0.8 M$, NPV(5 years)~ 3.6 M$, NPV(20 years)~11.3 M$.