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14              Renewable Energy Devices and Systems with Simulations in MATLAB  and ANSYS ®
                                                                                ®


            TABLE 1.1 (Continued )
            Renewable Energy Technologies: Present Status, Research Challenges and Opportunities,
            and Future Trends to 2025
            Renewable                            Research Challenges and
            Energies          Present Status         Opportunities      Trends to 2025 (Prediction)
            Fuel cell—high   •  SOFC and MCFC have   •  Improve durability.  •  SOFC commercial DG
             temperature  majority.            •  Stack sintering of SOFC.  plants.
                         •  Fuel cell–based micro-  •  Improve conversion   •  Degradation: 0.2%/1000
                          Combined Heat and Power   efficiency.         hours.
                          (m-CHP).                                     •  USD 2500/kWe at 1 MWe.
            Batteries    •  Efficiency of 75%–95%.  •  Improve reliability.  •  Reliability and energy
             (storage)   •  Cost near competitive for   •  New materials to enhance   density to be improved.
                          many off-grid and remote   energy density.   •  Growth in on-grid
                          applications.        •  Battery management    applications.
                         •  USD 300–USD 3500/kW   systems.             •  USD 1000/kW for new
                          for distributed or off-grid                   on-grid battery systems.
                          storage.
            Hydrogen     •  Hydrogen FCV       •  Energy efficiency is a   •  Market introduction of
             (storage)    commercialized.        challenge.             hydrogen power plant.
                         •  MW-level plants    •  New methods for hydrogen   •  Hydrogen from renewables.
                          demonstrated.          storage and transport.  •  70% cost reduction for
                         •  Efficiency of 22%–50%.  •  Thermal management.  electric vehicle applications.
                         •  Compressed hydrogen
                          transport.
                         •  USD 500–USD 750/kW.
            Notes:  The LCOE of fossil fuel power plants is typically from USD 0.045 to USD 0.14/kWh.
            Abbreviations: LCOE, levelized cost of energy; MV, medium voltage; USD, U.S. dollars; DFIG, doubly fed induction gen-
            erator; PMSG, permanent magnet synchronous generator; PV, photovoltaic; FCV, fuel cell vehicles; PEMFC, proton
            exchange membrane fuel cells; SOFC, solid oxide fuel cells; MCFC, molten carbonate fuel cells; UPS, uninterruptible power
            supply; DG, distributed generation.


              This book covers topics of
              •  Maximum power point techniques for PV systems
              •  Single-phase and three-phase grid-connected PV systems, respectively
              •  Fuel cells and their power conversion and control
              •  Small and large wind turbine systems, respectively, including power electronics and electric
                 generators
              •  Marine hydrokinetic generators and power plants
              •  Batteries and ultracapacitors used for renewable energy support
              •  Architectures, controls, and other microgrid issues
            The papers on related topics of smart grid published in the double special issue 42(3–4) are also
            recommended for further reading [41].

            REFERENCES

              1. International Energy Agency (IEA), World energy outlook 2004, OECD, Paris, France, 2004, http://www.
               worldenergyoutlook.org/media/weowebsite/2008-1994/weo2004.pdf, Retrieved on October 26, 2016.
              2. International Renewable Energy Agency (IRENA), Renewable energy capacity statistics 2015, June 2015,
               http://www.irena.org/publications, last accessed June 6, 2015.
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